Add dependencies/vendor (whatsapp)

26 files changed, 9679 insertions, 0 deletions

diff --git a/vendor/modernc.org/libc/limits/capi_darwin_amd64.go b/vendor/modernc.org/libc/limits/capi_darwin_amd64.go
new file mode 100644
index 00000000..5f13594d
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_darwin_amd64.go
@@ -0,0 +1,7 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_darwin_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{
+	"__darwin_check_fd_set_overflow": {},
+}
diff --git a/vendor/modernc.org/libc/limits/capi_darwin_arm64.go b/vendor/modernc.org/libc/limits/capi_darwin_arm64.go
new file mode 100644
index 00000000..81c0e802
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_darwin_arm64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_darwin_arm64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_freebsd_386.go b/vendor/modernc.org/libc/limits/capi_freebsd_386.go
new file mode 100644
index 00000000..18fba028
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_freebsd_386.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_freebsd_386.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_freebsd_amd64.go b/vendor/modernc.org/libc/limits/capi_freebsd_amd64.go
new file mode 100644
index 00000000..59d86908
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_freebsd_amd64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_freebsd_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_linux_386.go b/vendor/modernc.org/libc/limits/capi_linux_386.go
new file mode 100644
index 00000000..0f9d360d
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_linux_386.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_386.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_linux_amd64.go b/vendor/modernc.org/libc/limits/capi_linux_amd64.go
new file mode 100644
index 00000000..ebab7361
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_linux_amd64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_linux_arm.go b/vendor/modernc.org/libc/limits/capi_linux_arm.go
new file mode 100644
index 00000000..f9f73992
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_linux_arm.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_arm.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_linux_arm64.go b/vendor/modernc.org/libc/limits/capi_linux_arm64.go
new file mode 100644
index 00000000..75630661
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_linux_arm64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_arm64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_linux_s390x.go b/vendor/modernc.org/libc/limits/capi_linux_s390x.go
new file mode 100644
index 00000000..eca6eefc
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_linux_s390x.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_s390x.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_netbsd_amd64.go b/vendor/modernc.org/libc/limits/capi_netbsd_amd64.go
new file mode 100644
index 00000000..b1512432
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_netbsd_amd64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_netbsd_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_openbsd_amd64.go b/vendor/modernc.org/libc/limits/capi_openbsd_amd64.go
new file mode 100644
index 00000000..bda639df
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_openbsd_amd64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_openbsd_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_windows_386.go b/vendor/modernc.org/libc/limits/capi_windows_386.go
new file mode 100644
index 00000000..30ec29e9
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_windows_386.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_windows_386.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/capi_windows_amd64.go b/vendor/modernc.org/libc/limits/capi_windows_amd64.go
new file mode 100644
index 00000000..f16b0b15
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/capi_windows_amd64.go
@@ -0,0 +1,5 @@
+// Code generated by 'ccgo limits\gen.c -crt-import-path  -export-defines  -export-enums  -export-externs X -export-fields F -export-structs  -export-typedefs  -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits\limits_windows_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+var CAPI = map[string]struct{}{}
diff --git a/vendor/modernc.org/libc/limits/limits_darwin_amd64.go b/vendor/modernc.org/libc/limits/limits_darwin_amd64.go
new file mode 100644
index 00000000..a944a9ec
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_darwin_amd64.go
@@ -0,0 +1,935 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_darwin_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	ARG_MAX                                = 262144
+	BC_BASE_MAX                            = 99
+	BC_DIM_MAX                             = 2048
+	BC_SCALE_MAX                           = 99
+	BC_STRING_MAX                          = 1000
+	CHARCLASS_NAME_MAX                     = 14
+	CHAR_BIT                               = 8
+	CHAR_MAX                               = 127
+	CHAR_MIN                               = -128
+	CHILD_MAX                              = 266
+	CLK_TCK                                = 100
+	COLL_WEIGHTS_MAX                       = 2
+	EQUIV_CLASS_MAX                        = 2
+	EXPR_NEST_MAX                          = 32
+	GID_MAX                                = 2147483647
+	INT_MAX                                = 2147483647
+	INT_MIN                                = -2147483648
+	IOV_MAX                                = 1024
+	LINE_MAX                               = 2048
+	LINK_MAX                               = 32767
+	LLONG_MAX                              = 9223372036854775807
+	LLONG_MIN                              = -9223372036854775808
+	LONG_BIT                               = 64
+	LONG_LONG_MAX                          = 9223372036854775807
+	LONG_LONG_MIN                          = -9223372036854775808
+	LONG_MAX                               = 9223372036854775807
+	LONG_MIN                               = -9223372036854775808
+	MAX_CANON                              = 1024
+	MAX_INPUT                              = 1024
+	MB_LEN_MAX                             = 6
+	NAME_MAX                               = 255
+	NGROUPS_MAX                            = 16
+	NL_ARGMAX                              = 9
+	NL_LANGMAX                             = 14
+	NL_MSGMAX                              = 32767
+	NL_NMAX                                = 1
+	NL_SETMAX                              = 255
+	NL_TEXTMAX                             = 2048
+	NZERO                                  = 20
+	OFF_MAX                                = 9223372036854775807
+	OFF_MIN                                = -9223372036854775808
+	OPEN_MAX                               = 10240
+	PASS_MAX                               = 128
+	PATH_MAX                               = 1024
+	PIPE_BUF                               = 512
+	PTHREAD_DESTRUCTOR_ITERATIONS          = 4
+	PTHREAD_KEYS_MAX                       = 512
+	PTHREAD_STACK_MIN                      = 8192
+	QUAD_MAX                               = 9223372036854775807
+	QUAD_MIN                               = -9223372036854775808
+	RE_DUP_MAX                             = 255
+	SCHAR_MAX                              = 127
+	SCHAR_MIN                              = -128
+	SHRT_MAX                               = 32767
+	SHRT_MIN                               = -32768
+	SIZE_T_MAX                             = 18446744073709551615
+	SSIZE_MAX                              = 9223372036854775807
+	UCHAR_MAX                              = 255
+	UID_MAX                                = 2147483647
+	UINT_MAX                               = 4294967295
+	ULLONG_MAX                             = 18446744073709551615
+	ULONG_LONG_MAX                         = 18446744073709551615
+	ULONG_MAX                              = 18446744073709551615
+	UQUAD_MAX                              = 18446744073709551615
+	USHRT_MAX                              = 65535
+	WORD_BIT                               = 32
+	X_CDEFS_H_                             = 0
+	X_DARWIN_FEATURE_64_BIT_INODE          = 1
+	X_DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE = 1
+	X_DARWIN_FEATURE_UNIX_CONFORMANCE      = 3
+	X_FILE_OFFSET_BITS                     = 64
+	X_GCC_LIMITS_H_                        = 0
+	X_I386_LIMITS_H_                       = 0
+	X_I386__LIMITS_H_                      = 0
+	X_LIMITS_H_                            = 0
+	X_LIMITS_H___                          = 0
+	X_LP64                                 = 1
+	X_Nonnull                              = 0
+	X_Null_unspecified                     = 0
+	X_Nullable                             = 0
+	X_POSIX2_BC_BASE_MAX                   = 99
+	X_POSIX2_BC_DIM_MAX                    = 2048
+	X_POSIX2_BC_SCALE_MAX                  = 99
+	X_POSIX2_BC_STRING_MAX                 = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX            = 14
+	X_POSIX2_COLL_WEIGHTS_MAX              = 2
+	X_POSIX2_EQUIV_CLASS_MAX               = 2
+	X_POSIX2_EXPR_NEST_MAX                 = 32
+	X_POSIX2_LINE_MAX                      = 2048
+	X_POSIX2_RE_DUP_MAX                    = 255
+	X_POSIX_AIO_LISTIO_MAX                 = 2
+	X_POSIX_AIO_MAX                        = 1
+	X_POSIX_ARG_MAX                        = 4096
+	X_POSIX_CHILD_MAX                      = 25
+	X_POSIX_CLOCKRES_MIN                   = 20000000
+	X_POSIX_DELAYTIMER_MAX                 = 32
+	X_POSIX_HOST_NAME_MAX                  = 255
+	X_POSIX_LINK_MAX                       = 8
+	X_POSIX_LOGIN_NAME_MAX                 = 9
+	X_POSIX_MAX_CANON                      = 255
+	X_POSIX_MAX_INPUT                      = 255
+	X_POSIX_MQ_OPEN_MAX                    = 8
+	X_POSIX_MQ_PRIO_MAX                    = 32
+	X_POSIX_NAME_MAX                       = 14
+	X_POSIX_NGROUPS_MAX                    = 8
+	X_POSIX_OPEN_MAX                       = 20
+	X_POSIX_PATH_MAX                       = 256
+	X_POSIX_PIPE_BUF                       = 512
+	X_POSIX_RE_DUP_MAX                     = 255
+	X_POSIX_RTSIG_MAX                      = 8
+	X_POSIX_SEM_NSEMS_MAX                  = 256
+	X_POSIX_SEM_VALUE_MAX                  = 32767
+	X_POSIX_SIGQUEUE_MAX                   = 32
+	X_POSIX_SSIZE_MAX                      = 32767
+	X_POSIX_SS_REPL_MAX                    = 4
+	X_POSIX_STREAM_MAX                     = 8
+	X_POSIX_SYMLINK_MAX                    = 255
+	X_POSIX_SYMLOOP_MAX                    = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS   = 4
+	X_POSIX_THREAD_KEYS_MAX                = 128
+	X_POSIX_THREAD_THREADS_MAX             = 64
+	X_POSIX_TIMER_MAX                      = 32
+	X_POSIX_TRACE_EVENT_NAME_MAX           = 30
+	X_POSIX_TRACE_NAME_MAX                 = 8
+	X_POSIX_TRACE_SYS_MAX                  = 8
+	X_POSIX_TRACE_USER_EVENT_MAX           = 32
+	X_POSIX_TTY_NAME_MAX                   = 9
+	X_POSIX_TZNAME_MAX                     = 6
+	X_SYS_SYSLIMITS_H_                     = 0
+	X_XOPEN_IOV_MAX                        = 16
+	X_XOPEN_NAME_MAX                       = 255
+	X_XOPEN_PATH_MAX                       = 1024
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+var X__darwin_check_fd_set_overflow uintptr /* <builtin>:146:5: */
+
+// Copyright (C) 1992-2021 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (c) 2000, 2004-2007, 2009 Apple Inc. All rights reserved.
+//
+// @APPLE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this
+// file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_LICENSE_HEADER_END@
+//	$NetBSD: limits.h,v 1.8 1996/10/21 05:10:50 jtc Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.2 (Berkeley) 1/4/94
+
+// Copyright (c) 2000-2018 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+// Copyright 1995 NeXT Computer, Inc. All rights reserved.
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+
+// This SDK is designed to work with clang and specific versions of
+// gcc >= 4.0 with Apple's patch sets
+
+// Compatibility with compilers and environments that don't support compiler
+// feature checking function-like macros.
+
+// The __CONCAT macro is used to concatenate parts of symbol names, e.g.
+// with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
+// The __CONCAT macro is a bit tricky -- make sure you don't put spaces
+// in between its arguments.  __CONCAT can also concatenate double-quoted
+// strings produced by the __STRING macro, but this only works with ANSI C.
+
+// __unused denotes variables and functions that may not be used, preventing
+// the compiler from warning about it if not used.
+
+// __used forces variables and functions to be included even if it appears
+// to the compiler that they are not used (and would thust be discarded).
+
+// __cold marks code used for debugging or that is rarely taken
+// and tells the compiler to optimize for size and outline code.
+
+// __deprecated causes the compiler to produce a warning when encountering
+// code using the deprecated functionality.
+// __deprecated_msg() does the same, and compilers that support it will print
+// a message along with the deprecation warning.
+// This may require turning on such warning with the -Wdeprecated flag.
+// __deprecated_enum_msg() should be used on enums, and compilers that support
+// it will print the deprecation warning.
+// __kpi_deprecated() specifically indicates deprecation of kernel programming
+// interfaces in Kernel.framework used by KEXTs.
+
+// __unavailable causes the compiler to error out when encountering
+// code using the tagged function of variable.
+
+// Delete pseudo-keywords wherever they are not available or needed.
+
+// We use `__restrict' as a way to define the `restrict' type qualifier
+// without disturbing older software that is unaware of C99 keywords.
+
+// Compatibility with compilers and environments that don't support the
+// nullability feature.
+
+// __disable_tail_calls causes the compiler to not perform tail call
+// optimization inside the marked function.
+
+// __not_tail_called causes the compiler to prevent tail call optimization
+// on statically bound calls to the function.  It has no effect on indirect
+// calls.  Virtual functions, objective-c methods, and functions marked as
+// "always_inline" cannot be marked as __not_tail_called.
+
+// __result_use_check warns callers of a function that not using the function
+// return value is a bug, i.e. dismissing malloc() return value results in a
+// memory leak.
+
+// __swift_unavailable causes the compiler to mark a symbol as specifically
+// unavailable in Swift, regardless of any other availability in C.
+
+// __abortlike is the attribute to put on functions like abort() that are
+// typically used to mark assertions. These optimize the codegen
+// for outlining while still maintaining debugability.
+
+// Declaring inline functions within headers is error-prone due to differences
+// across various versions of the C language and extensions.  __header_inline
+// can be used to declare inline functions within system headers.  In cases
+// where you want to force inlining instead of letting the compiler make
+// the decision, you can use __header_always_inline.
+//
+// Be aware that using inline for functions which compilers may also provide
+// builtins can behave differently under various compilers.  If you intend to
+// provide an inline version of such a function, you may want to use a macro
+// instead.
+//
+// The check for !__GNUC__ || __clang__ is because gcc doesn't correctly
+// support c99 inline in some cases:
+// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55965
+
+// Compiler-dependent macros that bracket portions of code where the
+// "-Wunreachable-code" warning should be ignored. Please use sparingly.
+
+// Compiler-dependent macros to declare that functions take printf-like
+// or scanf-like arguments.  They are null except for versions of gcc
+// that are known to support the features properly.  Functions declared
+// with these attributes will cause compilation warnings if there is a
+// mismatch between the format string and subsequent function parameter
+// types.
+
+// Source compatibility only, ID string not emitted in object file
+
+// __alloc_size can be used to label function arguments that represent the
+// size of memory that the function allocates and returns. The one-argument
+// form labels a single argument that gives the allocation size (where the
+// arguments are numbered from 1):
+//
+// void	*malloc(size_t __size) __alloc_size(1);
+//
+// The two-argument form handles the case where the size is calculated as the
+// product of two arguments:
+//
+// void	*calloc(size_t __count, size_t __size) __alloc_size(1,2);
+
+// COMPILATION ENVIRONMENTS -- see compat(5) for additional detail
+//
+// DEFAULT	By default newly complied code will get POSIX APIs plus
+//		Apple API extensions in scope.
+//
+//		Most users will use this compilation environment to avoid
+//		behavioral differences between 32 and 64 bit code.
+//
+// LEGACY	Defining _NONSTD_SOURCE will get pre-POSIX APIs plus Apple
+//		API extensions in scope.
+//
+//		This is generally equivalent to the Tiger release compilation
+//		environment, except that it cannot be applied to 64 bit code;
+//		its use is discouraged.
+//
+//		We expect this environment to be deprecated in the future.
+//
+// STRICT	Defining _POSIX_C_SOURCE or _XOPEN_SOURCE restricts the
+//		available APIs to exactly the set of APIs defined by the
+//		corresponding standard, based on the value defined.
+//
+//		A correct, portable definition for _POSIX_C_SOURCE is 200112L.
+//		A correct, portable definition for _XOPEN_SOURCE is 600L.
+//
+//		Apple API extensions are not visible in this environment,
+//		which can cause Apple specific code to fail to compile,
+//		or behave incorrectly if prototypes are not in scope or
+//		warnings about missing prototypes are not enabled or ignored.
+//
+// In any compilation environment, for correct symbol resolution to occur,
+// function prototypes must be in scope.  It is recommended that all Apple
+// tools users add either the "-Wall" or "-Wimplicit-function-declaration"
+// compiler flags to their projects to be warned when a function is being
+// used without a prototype in scope.
+
+// These settings are particular to each product.
+// Platform: MacOSX
+// #undef __DARWIN_ONLY_UNIX_CONFORMANCE (automatically set for 64-bit)
+
+// The __DARWIN_ALIAS macros are used to do symbol renaming; they allow
+// legacy code to use the old symbol, thus maintaining binary compatibility
+// while new code can use a standards compliant version of the same function.
+//
+// __DARWIN_ALIAS is used by itself if the function signature has not
+// changed, it is used along with a #ifdef check for __DARWIN_UNIX03
+// if the signature has changed.  Because the __LP64__ environment
+// only supports UNIX03 semantics it causes __DARWIN_UNIX03 to be
+// defined, but causes __DARWIN_ALIAS to do no symbol mangling.
+//
+// As a special case, when XCode is used to target a specific version of the
+// OS, the manifest constant __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+// will be defined by the compiler, with the digits representing major version
+// time 100 + minor version times 10 (e.g. 10.5 := 1050).  If we are targeting
+// pre-10.5, and it is the default compilation environment, revert the
+// compilation environment to pre-__DARWIN_UNIX03.
+
+// symbol suffixes used for symbol versioning
+
+// symbol versioning macros
+
+// symbol release macros
+// Copyright (c) 2010 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+
+// POSIX.1 requires that the macros we test be defined before any standard
+// header file is included.  This permits us to convert values for feature
+// testing, as necessary, using only _POSIX_C_SOURCE.
+//
+// Here's a quick run-down of the versions:
+//  defined(_POSIX_SOURCE)		1003.1-1988
+//  _POSIX_C_SOURCE == 1L		1003.1-1990
+//  _POSIX_C_SOURCE == 2L		1003.2-1992 C Language Binding Option
+//  _POSIX_C_SOURCE == 199309L		1003.1b-1993
+//  _POSIX_C_SOURCE == 199506L		1003.1c-1995, 1003.1i-1995,
+//					and the omnibus ISO/IEC 9945-1: 1996
+//  _POSIX_C_SOURCE == 200112L		1003.1-2001
+//  _POSIX_C_SOURCE == 200809L		1003.1-2008
+//
+// In addition, the X/Open Portability Guide, which is now the Single UNIX
+// Specification, defines a feature-test macro which indicates the version of
+// that specification, and which subsumes _POSIX_C_SOURCE.
+
+// Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1L.
+
+// Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2L.
+
+// Deal with various X/Open Portability Guides and Single UNIX Spec.
+
+// Deal with all versions of POSIX.  The ordering relative to the tests above is
+// important.
+
+// POSIX C deprecation macros
+// Copyright (c) 2010 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+
+// Set a single macro which will always be defined and can be used to determine
+// the appropriate namespace.  For POSIX, these values will correspond to
+// _POSIX_C_SOURCE value.  Currently there are two additional levels corresponding
+// to ANSI (_ANSI_SOURCE) and Darwin extensions (_DARWIN_C_SOURCE)
+
+// If the developer has neither requested a strict language mode nor a version
+// of POSIX, turn on functionality provided by __STDC_WANT_LIB_EXT1__ as part
+// of __DARWIN_C_FULL.
+
+// long long is not supported in c89 (__STRICT_ANSI__), but g++ -ansi and
+// c99 still want long longs.  While not perfect, we allow long longs for
+// g++.
+
+// ****************************************
+//
+//  Public darwin-specific feature macros
+//
+
+// _DARWIN_FEATURE_64_BIT_INODE indicates that the ino_t type is 64-bit, and
+// structures modified for 64-bit inodes (like struct stat) will be used.
+
+// _DARWIN_FEATURE_64_ONLY_BIT_INODE indicates that the ino_t type may only
+// be 64-bit; there is no support for 32-bit ino_t when this macro is defined
+// (and non-zero).  There is no struct stat64 either, as the regular
+// struct stat will already be the 64-bit version.
+
+// _DARWIN_FEATURE_ONLY_VERS_1050 indicates that only those APIs updated
+// in 10.5 exists; no pre-10.5 variants are available.
+
+// _DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE indicates only UNIX conforming API
+// are available (the legacy BSD APIs are not available)
+
+// _DARWIN_FEATURE_UNIX_CONFORMANCE indicates whether UNIX conformance is on,
+// and specifies the conformance level (3 is SUSv3)
+
+// This macro casts away the qualifier from the variable
+//
+// Note: use at your own risk, removing qualifiers can result in
+// catastrophic run-time failures.
+
+// __XNU_PRIVATE_EXTERN is a linkage decoration indicating that a symbol can be
+// used from other compilation units, but not other libraries or executables.
+
+// Architecture validation for current SDK
+
+// Similar to OS_ENUM/OS_CLOSED_ENUM/OS_OPTIONS/OS_CLOSED_OPTIONS
+//
+// This provides more advanced type checking on compilers supporting
+// the proper extensions, even in C.
+
+// This is the `system' limits.h, independent of any particular
+//  compiler.  GCC provides its own limits.h which can be found in
+//  /usr/lib/gcc, although it is not very informative.
+//  This file is public domain.
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.3 (Berkeley) 1/4/94
+
+// Copyright (c) 2000-2018 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+// Copyright 1995 NeXT Computer, Inc. All rights reserved.
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+
+// Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
+//
+// @APPLE_LICENSE_HEADER_START@
+//
+// The contents of this file constitute Original Code as defined in and
+// are subject to the Apple Public Source License Version 1.1 (the
+// "License").  You may not use this file except in compliance with the
+// License.  Please obtain a copy of the License at
+// http://www.apple.com/publicsource and read it before using this file.
+//
+// This Original Code and all software distributed under the License are
+// distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+// License for the specific language governing rights and limitations
+// under the License.
+//
+// @APPLE_LICENSE_HEADER_END@
+
+// According to ANSI (section 2.2.4.2), the values below must be usable by
+// #if preprocessing directives.  Additionally, the expression must have the
+// same type as would an expression that is an object of the corresponding
+// type converted according to the integral promotions.  The subtraction for
+// INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
+// unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
+// These numbers work for pcc as well.  The UINT_MAX and ULONG_MAX values
+// are written as hex so that GCC will be quiet about large integer constants.
+
+// Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+//	$NetBSD: syslimits.h,v 1.15 1997/06/25 00:48:09 lukem Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
+
+// Copyright (c) 2000-2018 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+// Copyright 1995 NeXT Computer, Inc. All rights reserved.
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+
+// Note: CHILD_MAX *must* be less than hard_maxproc, which is set at
+// compile time; you *cannot* set it higher than the hard limit!!
+
+// = ((PRIO_MAX - PRIO_MIN) / 2) + 1
+// range: 0 - 39 [(2 * NZERO) - 1]
+// 0 is not actually used
+
+// Actually for XSI Visible
+
+// Removed in Issue 6
+
+// NZERO to be defined here. TBD. See also sys/param.h
+
+// Copyright (C) 1991-2021 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_darwin_arm64.go b/vendor/modernc.org/libc/limits/limits_darwin_arm64.go
new file mode 100644
index 00000000..d27a72e2
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_darwin_arm64.go
@@ -0,0 +1,932 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_darwin_arm64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	ARG_MAX                                = 1048576
+	BC_BASE_MAX                            = 99
+	BC_DIM_MAX                             = 2048
+	BC_SCALE_MAX                           = 99
+	BC_STRING_MAX                          = 1000
+	CHARCLASS_NAME_MAX                     = 14
+	CHAR_BIT                               = 8
+	CHAR_MAX                               = 127
+	CHAR_MIN                               = -128
+	CHILD_MAX                              = 266
+	CLK_TCK                                = 100
+	COLL_WEIGHTS_MAX                       = 2
+	EQUIV_CLASS_MAX                        = 2
+	EXPR_NEST_MAX                          = 32
+	GID_MAX                                = 2147483647
+	INT_MAX                                = 2147483647
+	INT_MIN                                = -2147483648
+	IOV_MAX                                = 1024
+	LINE_MAX                               = 2048
+	LINK_MAX                               = 32767
+	LLONG_MAX                              = 9223372036854775807
+	LLONG_MIN                              = -9223372036854775808
+	LONG_BIT                               = 64
+	LONG_LONG_MAX                          = 9223372036854775807
+	LONG_LONG_MIN                          = -9223372036854775808
+	LONG_MAX                               = 9223372036854775807
+	LONG_MIN                               = -9223372036854775808
+	MAX_CANON                              = 1024
+	MAX_INPUT                              = 1024
+	MB_LEN_MAX                             = 6
+	NAME_MAX                               = 255
+	NGROUPS_MAX                            = 16
+	NL_ARGMAX                              = 9
+	NL_LANGMAX                             = 14
+	NL_MSGMAX                              = 32767
+	NL_NMAX                                = 1
+	NL_SETMAX                              = 255
+	NL_TEXTMAX                             = 2048
+	NZERO                                  = 20
+	OFF_MAX                                = 9223372036854775807
+	OFF_MIN                                = -9223372036854775808
+	OPEN_MAX                               = 10240
+	PASS_MAX                               = 128
+	PATH_MAX                               = 1024
+	PIPE_BUF                               = 512
+	PTHREAD_DESTRUCTOR_ITERATIONS          = 4
+	PTHREAD_KEYS_MAX                       = 512
+	PTHREAD_STACK_MIN                      = 16384
+	QUAD_MAX                               = 9223372036854775807
+	QUAD_MIN                               = -9223372036854775808
+	RE_DUP_MAX                             = 255
+	SCHAR_MAX                              = 127
+	SCHAR_MIN                              = -128
+	SHRT_MAX                               = 32767
+	SHRT_MIN                               = -32768
+	SIZE_T_MAX                             = 18446744073709551615
+	SSIZE_MAX                              = 9223372036854775807
+	UCHAR_MAX                              = 255
+	UID_MAX                                = 2147483647
+	UINT_MAX                               = 4294967295
+	ULLONG_MAX                             = 18446744073709551615
+	ULONG_LONG_MAX                         = 18446744073709551615
+	ULONG_MAX                              = 18446744073709551615
+	UQUAD_MAX                              = 18446744073709551615
+	USHRT_MAX                              = 65535
+	WORD_BIT                               = 32
+	X_ARM_LIMITS_H_                        = 0
+	X_ARM__LIMITS_H_                       = 0
+	X_BSD_MACHINE_LIMITS_H_                = 0
+	X_CDEFS_H_                             = 0
+	X_DARWIN_FEATURE_64_BIT_INODE          = 1
+	X_DARWIN_FEATURE_ONLY_64_BIT_INODE     = 1
+	X_DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE = 1
+	X_DARWIN_FEATURE_ONLY_VERS_1050        = 1
+	X_DARWIN_FEATURE_UNIX_CONFORMANCE      = 3
+	X_FILE_OFFSET_BITS                     = 64
+	X_GCC_LIMITS_H_                        = 0
+	X_LIMITS_H_                            = 0
+	X_LIMITS_H___                          = 0
+	X_LP64                                 = 1
+	X_Nonnull                              = 0
+	X_Null_unspecified                     = 0
+	X_Nullable                             = 0
+	X_POSIX2_BC_BASE_MAX                   = 99
+	X_POSIX2_BC_DIM_MAX                    = 2048
+	X_POSIX2_BC_SCALE_MAX                  = 99
+	X_POSIX2_BC_STRING_MAX                 = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX            = 14
+	X_POSIX2_COLL_WEIGHTS_MAX              = 2
+	X_POSIX2_EQUIV_CLASS_MAX               = 2
+	X_POSIX2_EXPR_NEST_MAX                 = 32
+	X_POSIX2_LINE_MAX                      = 2048
+	X_POSIX2_RE_DUP_MAX                    = 255
+	X_POSIX_AIO_LISTIO_MAX                 = 2
+	X_POSIX_AIO_MAX                        = 1
+	X_POSIX_ARG_MAX                        = 4096
+	X_POSIX_CHILD_MAX                      = 25
+	X_POSIX_CLOCKRES_MIN                   = 20000000
+	X_POSIX_DELAYTIMER_MAX                 = 32
+	X_POSIX_HOST_NAME_MAX                  = 255
+	X_POSIX_LINK_MAX                       = 8
+	X_POSIX_LOGIN_NAME_MAX                 = 9
+	X_POSIX_MAX_CANON                      = 255
+	X_POSIX_MAX_INPUT                      = 255
+	X_POSIX_MQ_OPEN_MAX                    = 8
+	X_POSIX_MQ_PRIO_MAX                    = 32
+	X_POSIX_NAME_MAX                       = 14
+	X_POSIX_NGROUPS_MAX                    = 8
+	X_POSIX_OPEN_MAX                       = 20
+	X_POSIX_PATH_MAX                       = 256
+	X_POSIX_PIPE_BUF                       = 512
+	X_POSIX_RE_DUP_MAX                     = 255
+	X_POSIX_RTSIG_MAX                      = 8
+	X_POSIX_SEM_NSEMS_MAX                  = 256
+	X_POSIX_SEM_VALUE_MAX                  = 32767
+	X_POSIX_SIGQUEUE_MAX                   = 32
+	X_POSIX_SSIZE_MAX                      = 32767
+	X_POSIX_SS_REPL_MAX                    = 4
+	X_POSIX_STREAM_MAX                     = 8
+	X_POSIX_SYMLINK_MAX                    = 255
+	X_POSIX_SYMLOOP_MAX                    = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS   = 4
+	X_POSIX_THREAD_KEYS_MAX                = 128
+	X_POSIX_THREAD_THREADS_MAX             = 64
+	X_POSIX_TIMER_MAX                      = 32
+	X_POSIX_TRACE_EVENT_NAME_MAX           = 30
+	X_POSIX_TRACE_NAME_MAX                 = 8
+	X_POSIX_TRACE_SYS_MAX                  = 8
+	X_POSIX_TRACE_USER_EVENT_MAX           = 32
+	X_POSIX_TTY_NAME_MAX                   = 9
+	X_POSIX_TZNAME_MAX                     = 6
+	X_SYS_SYSLIMITS_H_                     = 0
+	X_XOPEN_IOV_MAX                        = 16
+	X_XOPEN_NAME_MAX                       = 255
+	X_XOPEN_PATH_MAX                       = 1024
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// Copyright (C) 1992-2021 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (c) 2000, 2004-2007, 2009 Apple Inc. All rights reserved.
+//
+// @APPLE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this
+// file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_LICENSE_HEADER_END@
+//	$NetBSD: limits.h,v 1.8 1996/10/21 05:10:50 jtc Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.2 (Berkeley) 1/4/94
+
+// Copyright (c) 2000-2018 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+// Copyright 1995 NeXT Computer, Inc. All rights reserved.
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+
+// This SDK is designed to work with clang and specific versions of
+// gcc >= 4.0 with Apple's patch sets
+
+// Compatibility with compilers and environments that don't support compiler
+// feature checking function-like macros.
+
+// The __CONCAT macro is used to concatenate parts of symbol names, e.g.
+// with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
+// The __CONCAT macro is a bit tricky -- make sure you don't put spaces
+// in between its arguments.  __CONCAT can also concatenate double-quoted
+// strings produced by the __STRING macro, but this only works with ANSI C.
+
+// __pure2 can be used for functions that are only a function of their scalar
+// arguments (meaning they can't dereference pointers).
+//
+// __stateful_pure can be used for functions that have no side effects,
+// but depend on the state of the memory.
+
+// __unused denotes variables and functions that may not be used, preventing
+// the compiler from warning about it if not used.
+
+// __used forces variables and functions to be included even if it appears
+// to the compiler that they are not used (and would thust be discarded).
+
+// __cold marks code used for debugging or that is rarely taken
+// and tells the compiler to optimize for size and outline code.
+
+// __exported denotes symbols that should be exported even when symbols
+// are hidden by default.
+// __exported_push/_exported_pop are pragmas used to delimit a range of
+//  symbols that should be exported even when symbols are hidden by default.
+
+// __deprecated causes the compiler to produce a warning when encountering
+// code using the deprecated functionality.
+// __deprecated_msg() does the same, and compilers that support it will print
+// a message along with the deprecation warning.
+// This may require turning on such warning with the -Wdeprecated flag.
+// __deprecated_enum_msg() should be used on enums, and compilers that support
+// it will print the deprecation warning.
+// __kpi_deprecated() specifically indicates deprecation of kernel programming
+// interfaces in Kernel.framework used by KEXTs.
+
+// __unavailable causes the compiler to error out when encountering
+// code using the tagged function
+
+// Delete pseudo-keywords wherever they are not available or needed.
+
+// We use `__restrict' as a way to define the `restrict' type qualifier
+// without disturbing older software that is unaware of C99 keywords.
+
+// Compatibility with compilers and environments that don't support the
+// nullability feature.
+
+// __disable_tail_calls causes the compiler to not perform tail call
+// optimization inside the marked function.
+
+// __not_tail_called causes the compiler to prevent tail call optimization
+// on statically bound calls to the function.  It has no effect on indirect
+// calls.  Virtual functions, objective-c methods, and functions marked as
+// "always_inline" cannot be marked as __not_tail_called.
+
+// __result_use_check warns callers of a function that not using the function
+// return value is a bug, i.e. dismissing malloc() return value results in a
+// memory leak.
+
+// __swift_unavailable causes the compiler to mark a symbol as specifically
+// unavailable in Swift, regardless of any other availability in C.
+
+// __abortlike is the attribute to put on functions like abort() that are
+// typically used to mark assertions. These optimize the codegen
+// for outlining while still maintaining debugability.
+
+// Declaring inline functions within headers is error-prone due to differences
+// across various versions of the C language and extensions.  __header_inline
+// can be used to declare inline functions within system headers.  In cases
+// where you want to force inlining instead of letting the compiler make
+// the decision, you can use __header_always_inline.
+//
+// Be aware that using inline for functions which compilers may also provide
+// builtins can behave differently under various compilers.  If you intend to
+// provide an inline version of such a function, you may want to use a macro
+// instead.
+//
+// The check for !__GNUC__ || __clang__ is because gcc doesn't correctly
+// support c99 inline in some cases:
+// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55965
+
+// Compiler-dependent macros that bracket portions of code where the
+// "-Wunreachable-code" warning should be ignored. Please use sparingly.
+
+// Compiler-dependent macros to declare that functions take printf-like
+// or scanf-like arguments.  They are null except for versions of gcc
+// that are known to support the features properly.  Functions declared
+// with these attributes will cause compilation warnings if there is a
+// mismatch between the format string and subsequent function parameter
+// types.
+
+// Source compatibility only, ID string not emitted in object file
+
+// __alloc_size can be used to label function arguments that represent the
+// size of memory that the function allocates and returns. The one-argument
+// form labels a single argument that gives the allocation size (where the
+// arguments are numbered from 1):
+//
+// void	*malloc(size_t __size) __alloc_size(1);
+//
+// The two-argument form handles the case where the size is calculated as the
+// product of two arguments:
+//
+// void	*calloc(size_t __count, size_t __size) __alloc_size(1,2);
+
+// COMPILATION ENVIRONMENTS -- see compat(5) for additional detail
+//
+// DEFAULT	By default newly complied code will get POSIX APIs plus
+//		Apple API extensions in scope.
+//
+//		Most users will use this compilation environment to avoid
+//		behavioral differences between 32 and 64 bit code.
+//
+// LEGACY	Defining _NONSTD_SOURCE will get pre-POSIX APIs plus Apple
+//		API extensions in scope.
+//
+//		This is generally equivalent to the Tiger release compilation
+//		environment, except that it cannot be applied to 64 bit code;
+//		its use is discouraged.
+//
+//		We expect this environment to be deprecated in the future.
+//
+// STRICT	Defining _POSIX_C_SOURCE or _XOPEN_SOURCE restricts the
+//		available APIs to exactly the set of APIs defined by the
+//		corresponding standard, based on the value defined.
+//
+//		A correct, portable definition for _POSIX_C_SOURCE is 200112L.
+//		A correct, portable definition for _XOPEN_SOURCE is 600L.
+//
+//		Apple API extensions are not visible in this environment,
+//		which can cause Apple specific code to fail to compile,
+//		or behave incorrectly if prototypes are not in scope or
+//		warnings about missing prototypes are not enabled or ignored.
+//
+// In any compilation environment, for correct symbol resolution to occur,
+// function prototypes must be in scope.  It is recommended that all Apple
+// tools users add either the "-Wall" or "-Wimplicit-function-declaration"
+// compiler flags to their projects to be warned when a function is being
+// used without a prototype in scope.
+
+// These settings are particular to each product.
+// Platform: MacOSX
+
+// The __DARWIN_ALIAS macros are used to do symbol renaming; they allow
+// legacy code to use the old symbol, thus maintaining binary compatibility
+// while new code can use a standards compliant version of the same function.
+//
+// __DARWIN_ALIAS is used by itself if the function signature has not
+// changed, it is used along with a #ifdef check for __DARWIN_UNIX03
+// if the signature has changed.  Because the __LP64__ environment
+// only supports UNIX03 semantics it causes __DARWIN_UNIX03 to be
+// defined, but causes __DARWIN_ALIAS to do no symbol mangling.
+//
+// As a special case, when XCode is used to target a specific version of the
+// OS, the manifest constant __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+// will be defined by the compiler, with the digits representing major version
+// time 100 + minor version times 10 (e.g. 10.5 := 1050).  If we are targeting
+// pre-10.5, and it is the default compilation environment, revert the
+// compilation environment to pre-__DARWIN_UNIX03.
+
+// symbol suffixes used for symbol versioning
+
+// symbol versioning macros
+
+// symbol release macros
+// Copyright (c) 2010 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+
+// POSIX.1 requires that the macros we test be defined before any standard
+// header file is included.  This permits us to convert values for feature
+// testing, as necessary, using only _POSIX_C_SOURCE.
+//
+// Here's a quick run-down of the versions:
+//  defined(_POSIX_SOURCE)		1003.1-1988
+//  _POSIX_C_SOURCE == 1L		1003.1-1990
+//  _POSIX_C_SOURCE == 2L		1003.2-1992 C Language Binding Option
+//  _POSIX_C_SOURCE == 199309L		1003.1b-1993
+//  _POSIX_C_SOURCE == 199506L		1003.1c-1995, 1003.1i-1995,
+//					and the omnibus ISO/IEC 9945-1: 1996
+//  _POSIX_C_SOURCE == 200112L		1003.1-2001
+//  _POSIX_C_SOURCE == 200809L		1003.1-2008
+//
+// In addition, the X/Open Portability Guide, which is now the Single UNIX
+// Specification, defines a feature-test macro which indicates the version of
+// that specification, and which subsumes _POSIX_C_SOURCE.
+
+// Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1L.
+
+// Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2L.
+
+// Deal with various X/Open Portability Guides and Single UNIX Spec.
+
+// Deal with all versions of POSIX.  The ordering relative to the tests above is
+// important.
+
+// POSIX C deprecation macros
+// Copyright (c) 2010 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+
+// Set a single macro which will always be defined and can be used to determine
+// the appropriate namespace.  For POSIX, these values will correspond to
+// _POSIX_C_SOURCE value.  Currently there are two additional levels corresponding
+// to ANSI (_ANSI_SOURCE) and Darwin extensions (_DARWIN_C_SOURCE)
+
+// If the developer has neither requested a strict language mode nor a version
+// of POSIX, turn on functionality provided by __STDC_WANT_LIB_EXT1__ as part
+// of __DARWIN_C_FULL.
+
+// long long is not supported in c89 (__STRICT_ANSI__), but g++ -ansi and
+// c99 still want long longs.  While not perfect, we allow long longs for
+// g++.
+
+// ****************************************
+//
+//  Public darwin-specific feature macros
+//
+
+// _DARWIN_FEATURE_64_BIT_INODE indicates that the ino_t type is 64-bit, and
+// structures modified for 64-bit inodes (like struct stat) will be used.
+
+// _DARWIN_FEATURE_64_ONLY_BIT_INODE indicates that the ino_t type may only
+// be 64-bit; there is no support for 32-bit ino_t when this macro is defined
+// (and non-zero).  There is no struct stat64 either, as the regular
+// struct stat will already be the 64-bit version.
+
+// _DARWIN_FEATURE_ONLY_VERS_1050 indicates that only those APIs updated
+// in 10.5 exists; no pre-10.5 variants are available.
+
+// _DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE indicates only UNIX conforming API
+// are available (the legacy BSD APIs are not available)
+
+// _DARWIN_FEATURE_UNIX_CONFORMANCE indicates whether UNIX conformance is on,
+// and specifies the conformance level (3 is SUSv3)
+
+// This macro casts away the qualifier from the variable
+//
+// Note: use at your own risk, removing qualifiers can result in
+// catastrophic run-time failures.
+
+// __XNU_PRIVATE_EXTERN is a linkage decoration indicating that a symbol can be
+// used from other compilation units, but not other libraries or executables.
+
+// Architecture validation for current SDK
+
+// Similar to OS_ENUM/OS_CLOSED_ENUM/OS_OPTIONS/OS_CLOSED_OPTIONS
+//
+// This provides more advanced type checking on compilers supporting
+// the proper extensions, even in C.
+
+// This is the `system' limits.h, independent of any particular
+//  compiler.  GCC provides its own limits.h which can be found in
+//  /usr/lib/gcc, although it is not very informative.
+//  This file is public domain.
+
+// Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.3 (Berkeley) 1/4/94
+
+// Copyright (c) 2000-2018 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+// Copyright 1995 NeXT Computer, Inc. All rights reserved.
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+
+// Copyright (c) 2004-2007 Apple Inc. All rights reserved.
+
+// According to ANSI (section 2.2.4.2), the values below must be usable by
+// #if preprocessing directives.  Additionally, the expression must have the
+// same type as would an expression that is an object of the corresponding
+// type converted according to the integral promotions.  The subtraction for
+// INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
+// unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
+// These numbers work for pcc as well.  The UINT_MAX and ULONG_MAX values
+// are written as hex so that GCC will be quiet about large integer constants.
+
+// Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+//	$NetBSD: syslimits.h,v 1.15 1997/06/25 00:48:09 lukem Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
+
+// Copyright (c) 2000-2018 Apple Inc. All rights reserved.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+//
+// This file contains Original Code and/or Modifications of Original Code
+// as defined in and that are subject to the Apple Public Source License
+// Version 2.0 (the 'License'). You may not use this file except in
+// compliance with the License. The rights granted to you under the License
+// may not be used to create, or enable the creation or redistribution of,
+// unlawful or unlicensed copies of an Apple operating system, or to
+// circumvent, violate, or enable the circumvention or violation of, any
+// terms of an Apple operating system software license agreement.
+//
+// Please obtain a copy of the License at
+// http://www.opensource.apple.com/apsl/ and read it before using this file.
+//
+// The Original Code and all software distributed under the License are
+// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+// EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+// Please see the License for the specific language governing rights and
+// limitations under the License.
+//
+// @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+// Copyright 1995 NeXT Computer, Inc. All rights reserved.
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. All advertising materials mentioning features or use of this software
+//    must display the following acknowledgement:
+//	This product includes software developed by the University of
+//	California, Berkeley and its contributors.
+// 4. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+
+// max bytes for an exec function
+
+// Note: CHILD_MAX *must* be less than hard_maxproc, which is set at
+// compile time; you *cannot* set it higher than the hard limit!!
+
+// = ((PRIO_MAX - PRIO_MIN) / 2) + 1
+// range: 0 - 39 [(2 * NZERO) - 1]
+// 0 is not actually used
+
+// Actually for XSI Visible
+
+// Removed in Issue 6
+
+// NZERO to be defined here. TBD. See also sys/param.h
+
+// Copyright (C) 1991-2021 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_freebsd_386.go b/vendor/modernc.org/libc/limits/limits_freebsd_386.go
new file mode 100644
index 00000000..c8018409
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_freebsd_386.go
@@ -0,0 +1,567 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_freebsd_386.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	ARG_MAX                              = 262144
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 14
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 127
+	CHAR_MIN                             = -128
+	CHILD_MAX                            = 40
+	COLL_WEIGHTS_MAX                     = 10
+	EXPR_NEST_MAX                        = 32
+	GID_MAX                              = 4294967295
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	IOV_MAX                              = 1024
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LONG_BIT                             = 32
+	LONG_MAX                             = 2147483647
+	LONG_MIN                             = -2147483648
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 6
+	MQ_PRIO_MAX                          = 64
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 1023
+	NL_ARGMAX                            = 4096
+	NL_LANGMAX                           = 31
+	NL_MSGMAX                            = 32767
+	NL_NMAX                              = 1
+	NL_SETMAX                            = 255
+	NL_TEXTMAX                           = 2048
+	OFF_MAX                              = 9223372036854775807
+	OFF_MIN                              = -9223372036854775808
+	OPEN_MAX                             = 64
+	PASS_MAX                             = 128
+	PATH_MAX                             = 1024
+	PIPE_BUF                             = 512
+	QUAD_MAX                             = 9223372036854775807
+	QUAD_MIN                             = -9223372036854775808
+	RE_DUP_MAX                           = 255
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SIZE_T_MAX                           = 4294967295
+	SSIZE_MAX                            = 2147483647
+	UCHAR_MAX                            = 255
+	UID_MAX                              = 4294967295
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 4294967295
+	UQUAD_MAX                            = 18446744073709551615
+	USHRT_MAX                            = 65535
+	WORD_BIT                             = 32
+	X_FILE_OFFSET_BITS                   = 64
+	X_ILP32                              = 1
+	X_LIMITS_H_                          = 0
+	X_MACHINE__LIMITS_H_                 = 0
+	X_Nonnull                            = 0
+	X_Null_unspecified                   = 0
+	X_Nullable                           = 0
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EQUIV_CLASS_MAX             = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_SS_REPL_MAX                  = 4
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TRACE_EVENT_NAME_MAX         = 30
+	X_POSIX_TRACE_NAME_MAX               = 8
+	X_POSIX_TRACE_SYS_MAX                = 8
+	X_POSIX_TRACE_USER_EVENT_MAX         = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_SYS_CDEFS_H_                       = 0
+	X_SYS_LIMITS_H_                      = 0
+	X_SYS_SYSLIMITS_H_                   = 0
+	X_XOPEN_IOV_MAX                      = 16
+	X_XOPEN_NAME_MAX                     = 255
+	X_XOPEN_PATH_MAX                     = 1024
+	I386                                 = 1
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int32 /* <builtin>:3:26 */
+
+type Size_t = uint32 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.2 (Berkeley) 1/4/94
+// $FreeBSD$
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+// $FreeBSD$
+
+// Testing against Clang-specific extensions.
+
+// This code has been put in place to help reduce the addition of
+// compiler specific defines in FreeBSD code.  It helps to aid in
+// having a compiler-agnostic source tree.
+
+// Compiler memory barriers, specific to gcc and clang.
+
+// XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced
+
+// Macro to test if we're using a specific version of gcc or later.
+
+// The __CONCAT macro is used to concatenate parts of symbol names, e.g.
+// with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
+// The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
+// mode -- there must be no spaces between its arguments, and for nested
+// __CONCAT's, all the __CONCAT's must be at the left.  __CONCAT can also
+// concatenate double-quoted strings produced by the __STRING macro, but
+// this only works with ANSI C.
+//
+// __XSTRING is like __STRING, but it expands any macros in its argument
+// first.  It is only available with ANSI C.
+
+// Compiler-dependent macros to help declare dead (non-returning) and
+// pure (no side effects) functions, and unused variables.  They are
+// null except for versions of gcc that are known to support the features
+// properly (old versions of gcc-2 supported the dead and pure features
+// in a different (wrong) way).  If we do not provide an implementation
+// for a given compiler, let the compile fail if it is told to use
+// a feature that we cannot live without.
+
+// Keywords added in C11.
+
+// Emulation of C11 _Generic().  Unlike the previously defined C11
+// keywords, it is not possible to implement this using exactly the same
+// syntax.  Therefore implement something similar under the name
+// __generic().  Unlike _Generic(), this macro can only distinguish
+// between a single type, so it requires nested invocations to
+// distinguish multiple cases.
+
+// C99 Static array indices in function parameter declarations.  Syntax such as:
+// void bar(int myArray[static 10]);
+// is allowed in C99 but not in C++.  Define __min_size appropriately so
+// headers using it can be compiled in either language.  Use like this:
+// void bar(int myArray[__min_size(10)]);
+
+// XXX: should use `#if __STDC_VERSION__ < 199901'.
+
+// C++11 exposes a load of C99 stuff
+
+// GCC 2.95 provides `__restrict' as an extension to C90 to support the
+// C99-specific `restrict' type qualifier.  We happen to use `__restrict' as
+// a way to define the `restrict' type qualifier without disturbing older
+// software that is unaware of C99 keywords.
+
+// GNU C version 2.96 adds explicit branch prediction so that
+// the CPU back-end can hint the processor and also so that
+// code blocks can be reordered such that the predicted path
+// sees a more linear flow, thus improving cache behavior, etc.
+//
+// The following two macros provide us with a way to utilize this
+// compiler feature.  Use __predict_true() if you expect the expression
+// to evaluate to true, and __predict_false() if you expect the
+// expression to evaluate to false.
+//
+// A few notes about usage:
+//
+//	* Generally, __predict_false() error condition checks (unless
+//	  you have some _strong_ reason to do otherwise, in which case
+//	  document it), and/or __predict_true() `no-error' condition
+//	  checks, assuming you want to optimize for the no-error case.
+//
+//	* Other than that, if you don't know the likelihood of a test
+//	  succeeding from empirical or other `hard' evidence, don't
+//	  make predictions.
+//
+//	* These are meant to be used in places that are run `a lot'.
+//	  It is wasteful to make predictions in code that is run
+//	  seldomly (e.g. at subsystem initialization time) as the
+//	  basic block reordering that this affects can often generate
+//	  larger code.
+
+// We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
+// require it.
+
+// Given the pointer x to the member m of the struct s, return
+// a pointer to the containing structure.  When using GCC, we first
+// assign pointer x to a local variable, to check that its type is
+// compatible with member m.
+
+// Compiler-dependent macros to declare that functions take printf-like
+// or scanf-like arguments.  They are null except for versions of gcc
+// that are known to support the features properly (old versions of gcc-2
+// didn't permit keeping the keywords out of the application namespace).
+
+// Compiler-dependent macros that rely on FreeBSD-specific extensions.
+
+// Embed the rcs id of a source file in the resulting library.  Note that in
+// more recent ELF binutils, we use .ident allowing the ID to be stripped.
+// Usage:
+//	__FBSDID("$FreeBSD$");
+
+// -
+// The following definitions are an extension of the behavior originally
+// implemented in <sys/_posix.h>, but with a different level of granularity.
+// POSIX.1 requires that the macros we test be defined before any standard
+// header file is included.
+//
+// Here's a quick run-down of the versions:
+//  defined(_POSIX_SOURCE)		1003.1-1988
+//  _POSIX_C_SOURCE == 1		1003.1-1990
+//  _POSIX_C_SOURCE == 2		1003.2-1992 C Language Binding Option
+//  _POSIX_C_SOURCE == 199309		1003.1b-1993
+//  _POSIX_C_SOURCE == 199506		1003.1c-1995, 1003.1i-1995,
+//					and the omnibus ISO/IEC 9945-1: 1996
+//  _POSIX_C_SOURCE == 200112		1003.1-2001
+//  _POSIX_C_SOURCE == 200809		1003.1-2008
+//
+// In addition, the X/Open Portability Guide, which is now the Single UNIX
+// Specification, defines a feature-test macro which indicates the version of
+// that specification, and which subsumes _POSIX_C_SOURCE.
+//
+// Our macros begin with two underscores to avoid namespace screwage.
+
+// Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1.
+
+// Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2.
+
+// Deal with various X/Open Portability Guides and Single UNIX Spec.
+
+// Deal with all versions of POSIX.  The ordering relative to the tests above is
+// important.
+// -
+// Deal with _ANSI_SOURCE:
+// If it is defined, and no other compilation environment is explicitly
+// requested, then define our internal feature-test macros to zero.  This
+// makes no difference to the preprocessor (undefined symbols in preprocessing
+// expressions are defined to have value zero), but makes it more convenient for
+// a test program to print out the values.
+//
+// If a program mistakenly defines _ANSI_SOURCE and some other macro such as
+// _POSIX_C_SOURCE, we will assume that it wants the broader compilation
+// environment (and in fact we will never get here).
+
+// User override __EXT1_VISIBLE
+
+// Old versions of GCC use non-standard ARM arch symbols; acle-compat.h
+// translates them to __ARM_ARCH and the modern feature symbols defined by ARM.
+
+// Nullability qualifiers: currently only supported by Clang.
+
+// Type Safety Checking
+//
+// Clang provides additional attributes to enable checking type safety
+// properties that cannot be enforced by the C type system.
+
+// Lock annotations.
+//
+// Clang provides support for doing basic thread-safety tests at
+// compile-time, by marking which locks will/should be held when
+// entering/leaving a functions.
+//
+// Furthermore, it is also possible to annotate variables and structure
+// members to enforce that they are only accessed when certain locks are
+// held.
+
+// Structure implements a lock.
+
+// Function acquires an exclusive or shared lock.
+
+// Function attempts to acquire an exclusive or shared lock.
+
+// Function releases a lock.
+
+// Function asserts that an exclusive or shared lock is held.
+
+// Function requires that an exclusive or shared lock is or is not held.
+
+// Function should not be analyzed.
+
+// Function or variable should not be sanitized, e.g., by AddressSanitizer.
+// GCC has the nosanitize attribute, but as a function attribute only, and
+// warns on use as a variable attribute.
+
+// Guard variables and structure members by lock.
+
+// Alignment builtins for better type checking and improved code generation.
+// Provide fallback versions for other compilers (GCC/Clang < 10):
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+// $FreeBSD$
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+// $FreeBSD$
+
+// -
+// This file is in the public domain.
+// $FreeBSD$
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.3 (Berkeley) 1/4/94
+// $FreeBSD$
+
+// According to ANSI (section 2.2.4.2), the values below must be usable by
+// #if preprocessing directives.  Additionally, the expression must have the
+// same type as would an expression that is an object of the corresponding
+// type converted according to the integral promotions.  The subtraction for
+// INT_MIN, etc., is so the value is not unsigned; e.g., 0x80000000 is an
+// unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
+
+// max value for an unsigned long long
+
+// Minimum signal stack size.
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
+// $FreeBSD$
+
+// Do not add any new variables here.  (See the comment at the end of
+// the file for why.)
+
+// We leave the following values undefined to force applications to either
+// assume conservative values or call sysconf() to get the current value.
+//
+// HOST_NAME_MAX
+//
+// (We should do this for most of the values currently defined here,
+// but many programs are not prepared to deal with this yet.)
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_freebsd_amd64.go b/vendor/modernc.org/libc/limits/limits_freebsd_amd64.go
new file mode 100644
index 00000000..732fa2a9
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_freebsd_amd64.go
@@ -0,0 +1,574 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_freebsd_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	ARG_MAX                              = 524288
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 14
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 127
+	CHAR_MIN                             = -128
+	CHILD_MAX                            = 40
+	COLL_WEIGHTS_MAX                     = 10
+	EXPR_NEST_MAX                        = 32
+	GID_MAX                              = 4294967295
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	IOV_MAX                              = 1024
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LONG_BIT                             = 64
+	LONG_MAX                             = 9223372036854775807
+	LONG_MIN                             = -9223372036854775808
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 6
+	MQ_PRIO_MAX                          = 64
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 1023
+	NL_ARGMAX                            = 4096
+	NL_LANGMAX                           = 31
+	NL_MSGMAX                            = 32767
+	NL_NMAX                              = 1
+	NL_SETMAX                            = 255
+	NL_TEXTMAX                           = 2048
+	OFF_MAX                              = 9223372036854775807
+	OFF_MIN                              = -9223372036854775808
+	OPEN_MAX                             = 64
+	PASS_MAX                             = 128
+	PATH_MAX                             = 1024
+	PIPE_BUF                             = 512
+	QUAD_MAX                             = 9223372036854775807
+	QUAD_MIN                             = -9223372036854775808
+	RE_DUP_MAX                           = 255
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SIZE_T_MAX                           = 18446744073709551615
+	SSIZE_MAX                            = 9223372036854775807
+	UCHAR_MAX                            = 255
+	UID_MAX                              = 4294967295
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 18446744073709551615
+	UQUAD_MAX                            = 18446744073709551615
+	USHRT_MAX                            = 65535
+	WORD_BIT                             = 32
+	X_FILE_OFFSET_BITS                   = 64
+	X_LIMITS_H_                          = 0
+	X_LP64                               = 1
+	X_MACHINE__LIMITS_H_                 = 0
+	X_Nonnull                            = 0
+	X_Null_unspecified                   = 0
+	X_Nullable                           = 0
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EQUIV_CLASS_MAX             = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_SS_REPL_MAX                  = 4
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TRACE_EVENT_NAME_MAX         = 30
+	X_POSIX_TRACE_NAME_MAX               = 8
+	X_POSIX_TRACE_SYS_MAX                = 8
+	X_POSIX_TRACE_USER_EVENT_MAX         = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_SYS_CDEFS_H_                       = 0
+	X_SYS_LIMITS_H_                      = 0
+	X_SYS_SYSLIMITS_H_                   = 0
+	X_XOPEN_IOV_MAX                      = 16
+	X_XOPEN_NAME_MAX                     = 255
+	X_XOPEN_PATH_MAX                     = 1024
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.2 (Berkeley) 1/4/94
+// $FreeBSD$
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+// $FreeBSD$
+
+// Testing against Clang-specific extensions.
+
+// This code has been put in place to help reduce the addition of
+// compiler specific defines in FreeBSD code.  It helps to aid in
+// having a compiler-agnostic source tree.
+
+// Compiler memory barriers, specific to gcc and clang.
+
+// XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced
+
+// Macro to test if we're using a specific version of gcc or later.
+
+// The __CONCAT macro is used to concatenate parts of symbol names, e.g.
+// with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
+// The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
+// mode -- there must be no spaces between its arguments, and for nested
+// __CONCAT's, all the __CONCAT's must be at the left.  __CONCAT can also
+// concatenate double-quoted strings produced by the __STRING macro, but
+// this only works with ANSI C.
+//
+// __XSTRING is like __STRING, but it expands any macros in its argument
+// first.  It is only available with ANSI C.
+
+// Compiler-dependent macros to help declare dead (non-returning) and
+// pure (no side effects) functions, and unused variables.  They are
+// null except for versions of gcc that are known to support the features
+// properly (old versions of gcc-2 supported the dead and pure features
+// in a different (wrong) way).  If we do not provide an implementation
+// for a given compiler, let the compile fail if it is told to use
+// a feature that we cannot live without.
+
+// Keywords added in C11.
+
+// Emulation of C11 _Generic().  Unlike the previously defined C11
+// keywords, it is not possible to implement this using exactly the same
+// syntax.  Therefore implement something similar under the name
+// __generic().  Unlike _Generic(), this macro can only distinguish
+// between a single type, so it requires nested invocations to
+// distinguish multiple cases.
+
+// C99 Static array indices in function parameter declarations.  Syntax such as:
+// void bar(int myArray[static 10]);
+// is allowed in C99 but not in C++.  Define __min_size appropriately so
+// headers using it can be compiled in either language.  Use like this:
+// void bar(int myArray[__min_size(10)]);
+
+// XXX: should use `#if __STDC_VERSION__ < 199901'.
+
+// C++11 exposes a load of C99 stuff
+
+// GCC 2.95 provides `__restrict' as an extension to C90 to support the
+// C99-specific `restrict' type qualifier.  We happen to use `__restrict' as
+// a way to define the `restrict' type qualifier without disturbing older
+// software that is unaware of C99 keywords.
+
+// GNU C version 2.96 adds explicit branch prediction so that
+// the CPU back-end can hint the processor and also so that
+// code blocks can be reordered such that the predicted path
+// sees a more linear flow, thus improving cache behavior, etc.
+//
+// The following two macros provide us with a way to utilize this
+// compiler feature.  Use __predict_true() if you expect the expression
+// to evaluate to true, and __predict_false() if you expect the
+// expression to evaluate to false.
+//
+// A few notes about usage:
+//
+//	* Generally, __predict_false() error condition checks (unless
+//	  you have some _strong_ reason to do otherwise, in which case
+//	  document it), and/or __predict_true() `no-error' condition
+//	  checks, assuming you want to optimize for the no-error case.
+//
+//	* Other than that, if you don't know the likelihood of a test
+//	  succeeding from empirical or other `hard' evidence, don't
+//	  make predictions.
+//
+//	* These are meant to be used in places that are run `a lot'.
+//	  It is wasteful to make predictions in code that is run
+//	  seldomly (e.g. at subsystem initialization time) as the
+//	  basic block reordering that this affects can often generate
+//	  larger code.
+
+// We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
+// require it.
+
+// Given the pointer x to the member m of the struct s, return
+// a pointer to the containing structure.  When using GCC, we first
+// assign pointer x to a local variable, to check that its type is
+// compatible with member m.
+
+// Compiler-dependent macros to declare that functions take printf-like
+// or scanf-like arguments.  They are null except for versions of gcc
+// that are known to support the features properly (old versions of gcc-2
+// didn't permit keeping the keywords out of the application namespace).
+
+// Compiler-dependent macros that rely on FreeBSD-specific extensions.
+
+// Embed the rcs id of a source file in the resulting library.  Note that in
+// more recent ELF binutils, we use .ident allowing the ID to be stripped.
+// Usage:
+//	__FBSDID("$FreeBSD$");
+
+// -
+// The following definitions are an extension of the behavior originally
+// implemented in <sys/_posix.h>, but with a different level of granularity.
+// POSIX.1 requires that the macros we test be defined before any standard
+// header file is included.
+//
+// Here's a quick run-down of the versions:
+//  defined(_POSIX_SOURCE)		1003.1-1988
+//  _POSIX_C_SOURCE == 1		1003.1-1990
+//  _POSIX_C_SOURCE == 2		1003.2-1992 C Language Binding Option
+//  _POSIX_C_SOURCE == 199309		1003.1b-1993
+//  _POSIX_C_SOURCE == 199506		1003.1c-1995, 1003.1i-1995,
+//					and the omnibus ISO/IEC 9945-1: 1996
+//  _POSIX_C_SOURCE == 200112		1003.1-2001
+//  _POSIX_C_SOURCE == 200809		1003.1-2008
+//
+// In addition, the X/Open Portability Guide, which is now the Single UNIX
+// Specification, defines a feature-test macro which indicates the version of
+// that specification, and which subsumes _POSIX_C_SOURCE.
+//
+// Our macros begin with two underscores to avoid namespace screwage.
+
+// Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1.
+
+// Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2.
+
+// Deal with various X/Open Portability Guides and Single UNIX Spec.
+
+// Deal with all versions of POSIX.  The ordering relative to the tests above is
+// important.
+// -
+// Deal with _ANSI_SOURCE:
+// If it is defined, and no other compilation environment is explicitly
+// requested, then define our internal feature-test macros to zero.  This
+// makes no difference to the preprocessor (undefined symbols in preprocessing
+// expressions are defined to have value zero), but makes it more convenient for
+// a test program to print out the values.
+//
+// If a program mistakenly defines _ANSI_SOURCE and some other macro such as
+// _POSIX_C_SOURCE, we will assume that it wants the broader compilation
+// environment (and in fact we will never get here).
+
+// User override __EXT1_VISIBLE
+
+// Old versions of GCC use non-standard ARM arch symbols; acle-compat.h
+// translates them to __ARM_ARCH and the modern feature symbols defined by ARM.
+
+// Nullability qualifiers: currently only supported by Clang.
+
+// Type Safety Checking
+//
+// Clang provides additional attributes to enable checking type safety
+// properties that cannot be enforced by the C type system.
+
+// Lock annotations.
+//
+// Clang provides support for doing basic thread-safety tests at
+// compile-time, by marking which locks will/should be held when
+// entering/leaving a functions.
+//
+// Furthermore, it is also possible to annotate variables and structure
+// members to enforce that they are only accessed when certain locks are
+// held.
+
+// Structure implements a lock.
+
+// Function acquires an exclusive or shared lock.
+
+// Function attempts to acquire an exclusive or shared lock.
+
+// Function releases a lock.
+
+// Function asserts that an exclusive or shared lock is held.
+
+// Function requires that an exclusive or shared lock is or is not held.
+
+// Function should not be analyzed.
+
+// Function or variable should not be sanitized, i.e. by AddressSanitizer.
+// GCC has the nosanitize attribute, but as a function attribute only, and
+// warns on use as a variable attribute.
+
+// Guard variables and structure members by lock.
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+// $FreeBSD$
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
+// $FreeBSD$
+
+// -
+// This file is in the public domain.
+// $FreeBSD$
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.3 (Berkeley) 1/4/94
+// $FreeBSD$
+
+// According to ANSI (section 2.2.4.2), the values below must be usable by
+// #if preprocessing directives.  Additionally, the expression must have the
+// same type as would an expression that is an object of the corresponding
+// type converted according to the integral promotions.  The subtraction for
+// INT_MIN, etc., is so the value is not unsigned; e.g., 0x80000000 is an
+// unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
+
+// max value for an unsigned long long
+
+// Quads and longs are the same on the amd64.  Ensure they stay in sync.
+
+// Minimum signal stack size.
+
+// -
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
+// $FreeBSD$
+
+// Do not add any new variables here.  (See the comment at the end of
+// the file for why.)
+
+// We leave the following values undefined to force applications to either
+// assume conservative values or call sysconf() to get the current value.
+//
+// HOST_NAME_MAX
+//
+// (We should do this for most of the values currently defined here,
+// but many programs are not prepared to deal with this yet.)
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_linux_386.go b/vendor/modernc.org/libc/limits/limits_linux_386.go
new file mode 100644
index 00000000..ed5d6106
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_linux_386.go
@@ -0,0 +1,932 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_386.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	AIO_PRIO_DELTA_MAX                   = 20
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 2048
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 127
+	CHAR_MIN                             = -128
+	COLL_WEIGHTS_MAX                     = 255
+	DELAYTIMER_MAX                       = 2147483647
+	EXPR_NEST_MAX                        = 32
+	HOST_NAME_MAX                        = 64
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 256
+	LONG_MAX                             = 2147483647
+	LONG_MIN                             = -2147483648
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 16
+	MQ_PRIO_MAX                          = 32768
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 65536
+	PATH_MAX                             = 4096
+	PIPE_BUF                             = 4096
+	PTHREAD_DESTRUCTOR_ITERATIONS        = 4
+	PTHREAD_KEYS_MAX                     = 1024
+	PTHREAD_STACK_MIN                    = 16384
+	RE_DUP_MAX                           = 32767
+	RTSIG_MAX                            = 32
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SEM_VALUE_MAX                        = 2147483647
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SSIZE_MAX                            = 2147483647
+	TTY_NAME_MAX                         = 32
+	UCHAR_MAX                            = 255
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 4294967295
+	USHRT_MAX                            = 65535
+	XATTR_LIST_MAX                       = 65536
+	XATTR_NAME_MAX                       = 255
+	XATTR_SIZE_MAX                       = 65536
+	X_ATFILE_SOURCE                      = 1
+	X_BITS_POSIX1_LIM_H                  = 1
+	X_BITS_POSIX2_LIM_H                  = 1
+	X_DEFAULT_SOURCE                     = 1
+	X_FEATURES_H                         = 1
+	X_FILE_OFFSET_BITS                   = 64
+	X_GCC_LIMITS_H_                      = 0
+	X_ILP32                              = 1
+	X_LIBC_LIMITS_H_                     = 1
+	X_LIMITS_H___                        = 0
+	X_LINUX_LIMITS_H                     = 0
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_C_SOURCE                     = 200809
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SOURCE                       = 1
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_STDC_PREDEF_H                      = 1
+	X_SYS_CDEFS_H                        = 1
+	I386                                 = 1
+	Linux                                = 1
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int32 /* <builtin>:3:26 */
+
+type Size_t = uint32 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types	<limits.h>
+
+// Handle feature test macros at the start of a header.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This header is internal to glibc and should not be included outside
+//    of glibc headers.  Headers including it must define
+//    __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first.  This header
+//    cannot have multiple include guards because ISO C feature test
+//    macros depend on the definition of the macro when an affected
+//    header is included, not when the first system header is
+//    included.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are defined by the user (or the compiler)
+//    to specify the desired environment:
+//
+//    __STRICT_ANSI__	ISO Standard C.
+//    _ISOC99_SOURCE	Extensions to ISO C89 from ISO C99.
+//    _ISOC11_SOURCE	Extensions to ISO C99 from ISO C11.
+//    _ISOC2X_SOURCE	Extensions to ISO C99 from ISO C2X.
+//    __STDC_WANT_LIB_EXT2__
+// 			Extensions to ISO C99 from TR 27431-2:2010.
+//    __STDC_WANT_IEC_60559_BFP_EXT__
+// 			Extensions to ISO C11 from TS 18661-1:2014.
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__
+// 			Extensions to ISO C11 from TS 18661-4:2015.
+//    __STDC_WANT_IEC_60559_TYPES_EXT__
+// 			Extensions to ISO C11 from TS 18661-3:2015.
+//
+//    _POSIX_SOURCE	IEEE Std 1003.1.
+//    _POSIX_C_SOURCE	If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
+// 			if >=199309L, add IEEE Std 1003.1b-1993;
+// 			if >=199506L, add IEEE Std 1003.1c-1995;
+// 			if >=200112L, all of IEEE 1003.1-2004
+// 			if >=200809L, all of IEEE 1003.1-2008
+//    _XOPEN_SOURCE	Includes POSIX and XPG things.  Set to 500 if
+// 			Single Unix conformance is wanted, to 600 for the
+// 			sixth revision, to 700 for the seventh revision.
+//    _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
+//    _LARGEFILE_SOURCE	Some more functions for correct standard I/O.
+//    _LARGEFILE64_SOURCE	Additional functionality from LFS for large files.
+//    _FILE_OFFSET_BITS=N	Select default filesystem interface.
+//    _ATFILE_SOURCE	Additional *at interfaces.
+//    _GNU_SOURCE		All of the above, plus GNU extensions.
+//    _DEFAULT_SOURCE	The default set of features (taking precedence over
+// 			__STRICT_ANSI__).
+//
+//    _FORTIFY_SOURCE	Add security hardening to many library functions.
+// 			Set to 1 or 2; 2 performs stricter checks than 1.
+//
+//    _REENTRANT, _THREAD_SAFE
+// 			Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
+//
+//    The `-ansi' switch to the GNU C compiler, and standards conformance
+//    options such as `-std=c99', define __STRICT_ANSI__.  If none of
+//    these are defined, or if _DEFAULT_SOURCE is defined, the default is
+//    to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
+//    200809L, as well as enabling miscellaneous functions from BSD and
+//    SVID.  If more than one of these are defined, they accumulate.  For
+//    example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
+//    give you ISO C, 1003.1, and 1003.2, but nothing else.
+//
+//    These are defined by this file and are used by the
+//    header files to decide what to declare or define:
+//
+//    __GLIBC_USE (F)	Define things from feature set F.  This is defined
+// 			to 1 or 0; the subsequent macros are either defined
+// 			or undefined, and those tests should be moved to
+// 			__GLIBC_USE.
+//    __USE_ISOC11		Define ISO C11 things.
+//    __USE_ISOC99		Define ISO C99 things.
+//    __USE_ISOC95		Define ISO C90 AMD1 (C95) things.
+//    __USE_ISOCXX11	Define ISO C++11 things.
+//    __USE_POSIX		Define IEEE Std 1003.1 things.
+//    __USE_POSIX2		Define IEEE Std 1003.2 things.
+//    __USE_POSIX199309	Define IEEE Std 1003.1, and .1b things.
+//    __USE_POSIX199506	Define IEEE Std 1003.1, .1b, .1c and .1i things.
+//    __USE_XOPEN		Define XPG things.
+//    __USE_XOPEN_EXTENDED	Define X/Open Unix things.
+//    __USE_UNIX98		Define Single Unix V2 things.
+//    __USE_XOPEN2K        Define XPG6 things.
+//    __USE_XOPEN2KXSI     Define XPG6 XSI things.
+//    __USE_XOPEN2K8       Define XPG7 things.
+//    __USE_XOPEN2K8XSI    Define XPG7 XSI things.
+//    __USE_LARGEFILE	Define correct standard I/O things.
+//    __USE_LARGEFILE64	Define LFS things with separate names.
+//    __USE_FILE_OFFSET64	Define 64bit interface as default.
+//    __USE_MISC		Define things from 4.3BSD or System V Unix.
+//    __USE_ATFILE		Define *at interfaces and AT_* constants for them.
+//    __USE_GNU		Define GNU extensions.
+//    __USE_FORTIFY_LEVEL	Additional security measures used, according to level.
+//
+//    The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
+//    defined by this file unconditionally.  `__GNU_LIBRARY__' is provided
+//    only for compatibility.  All new code should use the other symbols
+//    to test for features.
+//
+//    All macros listed above as possibly being defined by this file are
+//    explicitly undefined if they are not explicitly defined.
+//    Feature-test macros that are not defined by the user or compiler
+//    but are implied by the other feature-test macros defined (or by the
+//    lack of any definitions) are defined by the file.
+//
+//    ISO C feature test macros depend on the definition of the macro
+//    when an affected header is included, not when the first system
+//    header is included, and so they are handled in
+//    <bits/libc-header-start.h>, which does not have a multiple include
+//    guard.  Feature test macros that can be handled from the first
+//    system header included are handled here.
+
+// Undefine everything, so we get a clean slate.
+
+// Suppress kernel-name space pollution unless user expressedly asks
+//    for it.
+
+// Convenience macro to test the version of gcc.
+//    Use like this:
+//    #if __GNUC_PREREQ (2,8)
+//    ... code requiring gcc 2.8 or later ...
+//    #endif
+//    Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
+//    added in 2.0.
+
+// Similarly for clang.  Features added to GCC after version 4.2 may
+//    or may not also be available in clang, and clang's definitions of
+//    __GNUC(_MINOR)__ are fixed at 4 and 2 respectively.  Not all such
+//    features can be queried via __has_extension/__has_feature.
+
+// Whether to use feature set F.
+
+// _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
+//    _DEFAULT_SOURCE.  If _DEFAULT_SOURCE is present we do not
+//    issue a warning; the expectation is that the source is being
+//    transitioned to use the new macro.
+
+// If _GNU_SOURCE was defined by the user, turn on all the other features.
+
+// If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
+//    define _DEFAULT_SOURCE.
+
+// This is to enable the ISO C2X extension.
+
+// This is to enable the ISO C11 extension.
+
+// This is to enable the ISO C99 extension.
+
+// This is to enable the ISO C90 Amendment 1:1995 extension.
+
+// If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
+//    is defined, use POSIX.1-2008 (or another version depending on
+//    _XOPEN_SOURCE).
+
+// Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
+//    defined in all multithreaded code.  GNU libc has not required this
+//    for many years.  We now treat them as compatibility synonyms for
+//    _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
+//    comprehensive support for multithreaded code.  Using them never
+//    lowers the selected level of POSIX conformance, only raises it.
+
+// The function 'gets' existed in C89, but is impossible to use
+//    safely.  It has been removed from ISO C11 and ISO C++14.  Note: for
+//    compatibility with various implementations of <cstdio>, this test
+//    must consider only the value of __cplusplus when compiling C++.
+
+// GNU formerly extended the scanf functions with modified format
+//    specifiers %as, %aS, and %a[...] that allocate a buffer for the
+//    input using malloc.  This extension conflicts with ISO C99, which
+//    defines %a as a standalone format specifier that reads a floating-
+//    point number; moreover, POSIX.1-2008 provides the same feature
+//    using the modifier letter 'm' instead (%ms, %mS, %m[...]).
+//
+//    We now follow C99 unless GNU extensions are active and the compiler
+//    is specifically in C89 or C++98 mode (strict or not).  For
+//    instance, with GCC, -std=gnu11 will have C99-compliant scanf with
+//    or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the
+//    old extension.
+
+// Get definitions of __STDC_* predefined macros, if the compiler has
+//    not preincluded this header automatically.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This macro indicates that the installed library is the GNU C Library.
+//    For historic reasons the value now is 6 and this will stay from now
+//    on.  The use of this variable is deprecated.  Use __GLIBC__ and
+//    __GLIBC_MINOR__ now (see below) when you want to test for a specific
+//    GNU C library version and use the values in <gnu/lib-names.h> to get
+//    the sonames of the shared libraries.
+
+// Major and minor version number of the GNU C library package.  Use
+//    these macros to test for features in specific releases.
+
+// This is here only because every header file already includes this one.
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// We are almost always included from features.h.
+
+// The GNU libc does not support any K&R compilers or the traditional mode
+//    of ISO C compilers anymore.  Check for some of the combinations not
+//    anymore supported.
+
+// Some user header file might have defined this before.
+
+// All functions, except those with callbacks or those that
+//    synchronize memory, are leaf functions.
+
+// GCC can always grok prototypes.  For C++ programs we add throw()
+//    to help it optimize the function calls.  But this works only with
+//    gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
+//    as non-throwing using a function attribute since programs can use
+//    the -fexceptions options for C code as well.
+
+// Compilers that are not clang may object to
+//        #if defined __clang__ && __has_extension(...)
+//    even though they do not need to evaluate the right-hand side of the &&.
+
+// These two macros are not used in glibc anymore.  They are kept here
+//    only because some other projects expect the macros to be defined.
+
+// For these things, GCC behaves the ANSI way normally,
+//    and the non-ANSI way under -traditional.
+
+// This is not a typedef so `const __ptr_t' does the right thing.
+
+// C++ needs to know that types and declarations are C, not C++.
+
+// Fortify support.
+
+// Support for flexible arrays.
+//    Headers that should use flexible arrays only if they're "real"
+//    (e.g. only if they won't affect sizeof()) should test
+//    #if __glibc_c99_flexarr_available.
+
+// __asm__ ("xyz") is used throughout the headers to rename functions
+//    at the assembly language level.  This is wrapped by the __REDIRECT
+//    macro, in order to support compilers that can do this some other
+//    way.  When compilers don't support asm-names at all, we have to do
+//    preprocessor tricks instead (which don't have exactly the right
+//    semantics, but it's the best we can do).
+//
+//    Example:
+//    int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid);
+
+//
+// #elif __SOME_OTHER_COMPILER__
+//
+// # define __REDIRECT(name, proto, alias) name proto; 	_Pragma("let " #name " = " #alias)
+
+// GCC has various useful declarations that can be made with the
+//    `__attribute__' syntax.  All of the ways we use this do fine if
+//    they are omitted for compilers that don't understand it.
+
+// At some point during the gcc 2.96 development the `malloc' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Tell the compiler which arguments to an allocation function
+//    indicate the size of the allocation.
+
+// At some point during the gcc 2.96 development the `pure' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// This declaration tells the compiler that the value is constant.
+
+// At some point during the gcc 3.1 development the `used' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Since version 3.2, gcc allows marking deprecated functions.
+
+// Since version 4.5, gcc also allows one to specify the message printed
+//    when a deprecated function is used.  clang claims to be gcc 4.2, but
+//    may also support this feature.
+
+// At some point during the gcc 2.8 development the `format_arg' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+//    If several `format_arg' attributes are given for the same function, in
+//    gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
+//    all designated arguments are considered.
+
+// At some point during the gcc 2.97 development the `strfmon' format
+//    attribute for functions was introduced.  We don't want to use it
+//    unconditionally (although this would be possible) since it
+//    generates warnings.
+
+// The nonull function attribute allows to mark pointer parameters which
+//    must not be NULL.
+
+// If fortification mode, we warn about unused results of certain
+//    function calls which can lead to problems.
+
+// Forces a function to be always inlined.
+// The Linux kernel defines __always_inline in stddef.h (283d7573), and
+//    it conflicts with this definition.  Therefore undefine it first to
+//    allow either header to be included first.
+
+// Associate error messages with the source location of the call site rather
+//    than with the source location inside the function.
+
+// GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+//    inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__
+//    or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions
+//    older than 4.3 may define these macros and still not guarantee GNU inlining
+//    semantics.
+//
+//    clang++ identifies itself as gcc-4.2, but has support for GNU inlining
+//    semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and
+//    __GNUC_GNU_INLINE__ macro definitions.
+
+// GCC 4.3 and above allow passing all anonymous arguments of an
+//    __extern_always_inline function to some other vararg function.
+
+// It is possible to compile containing GCC extensions even if GCC is
+//    run in pedantic mode if the uses are carefully marked using the
+//    `__extension__' keyword.  But this is not generally available before
+//    version 2.8.
+
+// __restrict is known in EGCS 1.2 and above.
+
+// ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
+//      array_name[restrict]
+//    GCC 3.1 supports this.
+
+// Describes a char array whose address can safely be passed as the first
+//    argument to strncpy and strncat, as the char array is not necessarily
+//    a NUL-terminated string.
+
+// Undefine (also defined in libc-symbols.h).
+// Copies attributes from the declaration or type referenced by
+//    the argument.
+
+// Determine the wordsize from the preprocessor defines.
+
+// Properties of long double type.  ldbl-96 version.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License  published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// long double is distinct from double, so there is nothing to
+//    define here.
+
+// __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is
+//    intended for use in preprocessor macros.
+//
+//    Note: MESSAGE must be a _single_ string; concatenation of string
+//    literals is not supported.
+
+// Generic selection (ISO C11) is a C-only feature, available in GCC
+//    since version 4.9.  Previous versions do not provide generic
+//    selection, even though they might set __STDC_VERSION__ to 201112L,
+//    when in -std=c11 mode.  Thus, we must check for !defined __GNUC__
+//    when testing __STDC_VERSION__ for generic selection support.
+//    On the other hand, Clang also defines __GNUC__, so a clang-specific
+//    check is required to enable the use of generic selection.
+
+// If we don't have __REDIRECT, prototypes will be missing if
+//    __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64].
+
+// Decide whether we can define 'extern inline' functions in headers.
+
+// This is here only because every header file already includes this one.
+//    Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
+//    <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
+//    that will always return failure (and set errno to ENOSYS).
+// This file is automatically generated.
+//    This file selects the right generated file of `__stub_FUNCTION' macros
+//    based on the architecture being compiled for.
+
+// This file is automatically generated.
+//    It defines a symbol `__stub_FUNCTION' for each function
+//    in the C library which is a stub, meaning it will fail
+//    every time called, usually setting errno to ENOSYS.
+
+// ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
+//    macro.
+
+// ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
+//    macro.  Most but not all symbols enabled by that macro in TS
+//    18661-1 are enabled unconditionally in C2X; the symbols in Annex F
+//    still require that macro in C2X.
+
+// ISO/IEC TS 18661-4:2015 defines the
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__ macro.  Other than the reduction
+//    functions, the symbols from this TS are enabled unconditionally in
+//    C2X.
+
+// ISO/IEC TS 18661-3:2015 defines the
+//    __STDC_WANT_IEC_60559_TYPES_EXT__ macro.
+
+// Maximum length of any multibyte character in any locale.
+//    We define this value here since the gcc header does not define
+//    the correct value.
+
+// If we are not using GNU CC we have to define all the symbols ourself.
+//    Otherwise use gcc's definitions (see below).
+
+// Get the compiler's limits.h, which defines almost all the ISO constants.
+//
+//     We put this #include_next outside the double inclusion check because
+//     it should be possible to include this file more than once and still get
+//     the definitions from gcc's header.
+
+// The <limits.h> files in some gcc versions don't define LLONG_MIN,
+//    LLONG_MAX, and ULLONG_MAX.  Instead only the values gcc defined for
+//    ages are available.
+
+// The integer width macros are not defined by GCC's <limits.h> before
+//    GCC 7, or if _GNU_SOURCE rather than
+//    __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature.
+
+// POSIX adds things to <limits.h>.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
+//
+//	Never include this file directly; use <limits.h> instead.
+
+// Determine the wordsize from the preprocessor defines.
+
+// These are the standard-mandated minimum values.
+
+// Minimum number of operations in one list I/O call.
+
+// Minimal number of outstanding asynchronous I/O operations.
+
+// Maximum length of arguments to `execve', including environment.
+
+// Maximum simultaneous processes per real user ID.
+
+// Minimal number of timer expiration overruns.
+
+// Maximum length of a host name (not including the terminating null)
+//    as returned from the GETHOSTNAME function.
+
+// Maximum link count of a file.
+
+// Maximum length of login name.
+
+// Number of bytes in a terminal canonical input queue.
+
+// Number of bytes for which space will be
+//    available in a terminal input queue.
+
+// Maximum number of message queues open for a process.
+
+// Maximum number of supported message priorities.
+
+// Number of bytes in a filename.
+
+// Number of simultaneous supplementary group IDs per process.
+
+// Number of files one process can have open at once.
+
+// Number of bytes in a pathname.
+
+// Number of bytes than can be written atomically to a pipe.
+
+// The number of repeated occurrences of a BRE permitted by the
+//    REGEXEC and REGCOMP functions when using the interval notation.
+
+// Minimal number of realtime signals reserved for the application.
+
+// Number of semaphores a process can have.
+
+// Maximal value of a semaphore.
+
+// Number of pending realtime signals.
+
+// Largest value of a `ssize_t'.
+
+// Number of streams a process can have open at once.
+
+// The number of bytes in a symbolic link.
+
+// The number of symbolic links that can be traversed in the
+//    resolution of a pathname in the absence of a loop.
+
+// Number of timer for a process.
+
+// Maximum number of characters in a tty name.
+
+// Maximum length of a timezone name (element of `tzname').
+
+// Maximum clock resolution in nanoseconds.
+
+// Get the implementation-specific values for the above.
+// Minimum guaranteed maximum values for system limits.  Linux version.
+//    Copyright (C) 1993-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public License as
+//    published by the Free Software Foundation; either version 2.1 of the
+//    License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; see the file COPYING.LIB.  If
+//    not, see <https://www.gnu.org/licenses/>.
+
+// The kernel header pollutes the namespace with the NR_OPEN symbol
+//    and defines LINK_MAX although filesystems have different maxima.  A
+//    similar thing is true for OPEN_MAX: the limit can be changed at
+//    runtime and therefore the macro must not be defined.  Remove this
+//    after including the header if necessary.
+
+// The kernel sources contain a file with all the needed information.
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+// Have to remove NR_OPEN?
+// Have to remove LINK_MAX?
+// Have to remove OPEN_MAX?
+// Have to remove ARG_MAX?
+
+// The number of data keys per process.
+// This is the value this implementation supports.
+
+// Controlling the iterations of destructors for thread-specific data.
+// Number of iterations this implementation does.
+
+// The number of threads per process.
+// We have no predefined limit on the number of threads.
+
+// Maximum amount by which a process can descrease its asynchronous I/O
+//    priority level.
+
+// Minimum size for a thread.  We are free to choose a reasonable value.
+
+// Maximum number of timer expiration overruns.
+
+// Maximum tty name length.
+
+// Maximum login name length.  This is arbitrary.
+
+// Maximum host name length.
+
+// Maximum message queue priority level.
+
+// Maximum value the semaphore can have.
+
+// ssize_t is not formally required to be the signed type
+//    corresponding to size_t, but it is for all configurations supported
+//    by glibc.
+
+// This value is a guaranteed minimum maximum.
+//    The current maximum can be got from `sysconf'.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Never include this file directly; include <limits.h> instead.
+
+// The maximum `ibase' and `obase' values allowed by the `bc' utility.
+
+// The maximum number of elements allowed in an array by the `bc' utility.
+
+// The maximum `scale' value allowed by the `bc' utility.
+
+// The maximum length of a string constant accepted by the `bc' utility.
+
+// The maximum number of weights that can be assigned to an entry of
+//    the LC_COLLATE `order' keyword in the locale definition file.
+
+// The maximum number of expressions that can be nested
+//    within parentheses by the `expr' utility.
+
+// The maximum length, in bytes, of an input line.
+
+// The maximum number of repeated occurrences of a regular expression
+//    permitted when using the interval notation `\{M,N\}'.
+
+// The maximum number of bytes in a character class name.  We have no
+//    fixed limit, 2048 is a high number.
+
+// These values are implementation-specific,
+//    and may vary within the implementation.
+//    Their precise values can be obtained from sysconf.
+
+// This value is defined like this in regex.h.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_linux_amd64.go b/vendor/modernc.org/libc/limits/limits_linux_amd64.go
new file mode 100644
index 00000000..a9a95595
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_linux_amd64.go
@@ -0,0 +1,943 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	AIO_PRIO_DELTA_MAX                   = 20
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 2048
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 127
+	CHAR_MIN                             = -128
+	COLL_WEIGHTS_MAX                     = 255
+	DELAYTIMER_MAX                       = 2147483647
+	EXPR_NEST_MAX                        = 32
+	HOST_NAME_MAX                        = 64
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 256
+	LONG_MAX                             = 9223372036854775807
+	LONG_MIN                             = -9223372036854775808
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 16
+	MQ_PRIO_MAX                          = 32768
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 65536
+	PATH_MAX                             = 4096
+	PIPE_BUF                             = 4096
+	PTHREAD_DESTRUCTOR_ITERATIONS        = 4
+	PTHREAD_KEYS_MAX                     = 1024
+	PTHREAD_STACK_MIN                    = 16384
+	RE_DUP_MAX                           = 32767
+	RTSIG_MAX                            = 32
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SEM_VALUE_MAX                        = 2147483647
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SSIZE_MAX                            = 9223372036854775807
+	TTY_NAME_MAX                         = 32
+	UCHAR_MAX                            = 255
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 18446744073709551615
+	USHRT_MAX                            = 65535
+	XATTR_LIST_MAX                       = 65536
+	XATTR_NAME_MAX                       = 255
+	XATTR_SIZE_MAX                       = 65536
+	X_ATFILE_SOURCE                      = 1
+	X_BITS_POSIX1_LIM_H                  = 1
+	X_BITS_POSIX2_LIM_H                  = 1
+	X_DEFAULT_SOURCE                     = 1
+	X_FEATURES_H                         = 1
+	X_FILE_OFFSET_BITS                   = 64
+	X_GCC_LIMITS_H_                      = 0
+	X_LIBC_LIMITS_H_                     = 1
+	X_LIMITS_H___                        = 0
+	X_LINUX_LIMITS_H                     = 0
+	X_LP64                               = 1
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_C_SOURCE                     = 200809
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SOURCE                       = 1
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_STDC_PREDEF_H                      = 1
+	X_SYS_CDEFS_H                        = 1
+	Linux                                = 1
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types	<limits.h>
+
+// Handle feature test macros at the start of a header.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This header is internal to glibc and should not be included outside
+//    of glibc headers.  Headers including it must define
+//    __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first.  This header
+//    cannot have multiple include guards because ISO C feature test
+//    macros depend on the definition of the macro when an affected
+//    header is included, not when the first system header is
+//    included.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are defined by the user (or the compiler)
+//    to specify the desired environment:
+//
+//    __STRICT_ANSI__	ISO Standard C.
+//    _ISOC99_SOURCE	Extensions to ISO C89 from ISO C99.
+//    _ISOC11_SOURCE	Extensions to ISO C99 from ISO C11.
+//    _ISOC2X_SOURCE	Extensions to ISO C99 from ISO C2X.
+//    __STDC_WANT_LIB_EXT2__
+// 			Extensions to ISO C99 from TR 27431-2:2010.
+//    __STDC_WANT_IEC_60559_BFP_EXT__
+// 			Extensions to ISO C11 from TS 18661-1:2014.
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__
+// 			Extensions to ISO C11 from TS 18661-4:2015.
+//    __STDC_WANT_IEC_60559_TYPES_EXT__
+// 			Extensions to ISO C11 from TS 18661-3:2015.
+//
+//    _POSIX_SOURCE	IEEE Std 1003.1.
+//    _POSIX_C_SOURCE	If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
+// 			if >=199309L, add IEEE Std 1003.1b-1993;
+// 			if >=199506L, add IEEE Std 1003.1c-1995;
+// 			if >=200112L, all of IEEE 1003.1-2004
+// 			if >=200809L, all of IEEE 1003.1-2008
+//    _XOPEN_SOURCE	Includes POSIX and XPG things.  Set to 500 if
+// 			Single Unix conformance is wanted, to 600 for the
+// 			sixth revision, to 700 for the seventh revision.
+//    _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
+//    _LARGEFILE_SOURCE	Some more functions for correct standard I/O.
+//    _LARGEFILE64_SOURCE	Additional functionality from LFS for large files.
+//    _FILE_OFFSET_BITS=N	Select default filesystem interface.
+//    _ATFILE_SOURCE	Additional *at interfaces.
+//    _GNU_SOURCE		All of the above, plus GNU extensions.
+//    _DEFAULT_SOURCE	The default set of features (taking precedence over
+// 			__STRICT_ANSI__).
+//
+//    _FORTIFY_SOURCE	Add security hardening to many library functions.
+// 			Set to 1 or 2; 2 performs stricter checks than 1.
+//
+//    _REENTRANT, _THREAD_SAFE
+// 			Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
+//
+//    The `-ansi' switch to the GNU C compiler, and standards conformance
+//    options such as `-std=c99', define __STRICT_ANSI__.  If none of
+//    these are defined, or if _DEFAULT_SOURCE is defined, the default is
+//    to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
+//    200809L, as well as enabling miscellaneous functions from BSD and
+//    SVID.  If more than one of these are defined, they accumulate.  For
+//    example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
+//    give you ISO C, 1003.1, and 1003.2, but nothing else.
+//
+//    These are defined by this file and are used by the
+//    header files to decide what to declare or define:
+//
+//    __GLIBC_USE (F)	Define things from feature set F.  This is defined
+// 			to 1 or 0; the subsequent macros are either defined
+// 			or undefined, and those tests should be moved to
+// 			__GLIBC_USE.
+//    __USE_ISOC11		Define ISO C11 things.
+//    __USE_ISOC99		Define ISO C99 things.
+//    __USE_ISOC95		Define ISO C90 AMD1 (C95) things.
+//    __USE_ISOCXX11	Define ISO C++11 things.
+//    __USE_POSIX		Define IEEE Std 1003.1 things.
+//    __USE_POSIX2		Define IEEE Std 1003.2 things.
+//    __USE_POSIX199309	Define IEEE Std 1003.1, and .1b things.
+//    __USE_POSIX199506	Define IEEE Std 1003.1, .1b, .1c and .1i things.
+//    __USE_XOPEN		Define XPG things.
+//    __USE_XOPEN_EXTENDED	Define X/Open Unix things.
+//    __USE_UNIX98		Define Single Unix V2 things.
+//    __USE_XOPEN2K        Define XPG6 things.
+//    __USE_XOPEN2KXSI     Define XPG6 XSI things.
+//    __USE_XOPEN2K8       Define XPG7 things.
+//    __USE_XOPEN2K8XSI    Define XPG7 XSI things.
+//    __USE_LARGEFILE	Define correct standard I/O things.
+//    __USE_LARGEFILE64	Define LFS things with separate names.
+//    __USE_FILE_OFFSET64	Define 64bit interface as default.
+//    __USE_MISC		Define things from 4.3BSD or System V Unix.
+//    __USE_ATFILE		Define *at interfaces and AT_* constants for them.
+//    __USE_GNU		Define GNU extensions.
+//    __USE_FORTIFY_LEVEL	Additional security measures used, according to level.
+//
+//    The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
+//    defined by this file unconditionally.  `__GNU_LIBRARY__' is provided
+//    only for compatibility.  All new code should use the other symbols
+//    to test for features.
+//
+//    All macros listed above as possibly being defined by this file are
+//    explicitly undefined if they are not explicitly defined.
+//    Feature-test macros that are not defined by the user or compiler
+//    but are implied by the other feature-test macros defined (or by the
+//    lack of any definitions) are defined by the file.
+//
+//    ISO C feature test macros depend on the definition of the macro
+//    when an affected header is included, not when the first system
+//    header is included, and so they are handled in
+//    <bits/libc-header-start.h>, which does not have a multiple include
+//    guard.  Feature test macros that can be handled from the first
+//    system header included are handled here.
+
+// Undefine everything, so we get a clean slate.
+
+// Suppress kernel-name space pollution unless user expressedly asks
+//    for it.
+
+// Convenience macro to test the version of gcc.
+//    Use like this:
+//    #if __GNUC_PREREQ (2,8)
+//    ... code requiring gcc 2.8 or later ...
+//    #endif
+//    Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
+//    added in 2.0.
+
+// Similarly for clang.  Features added to GCC after version 4.2 may
+//    or may not also be available in clang, and clang's definitions of
+//    __GNUC(_MINOR)__ are fixed at 4 and 2 respectively.  Not all such
+//    features can be queried via __has_extension/__has_feature.
+
+// Whether to use feature set F.
+
+// _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
+//    _DEFAULT_SOURCE.  If _DEFAULT_SOURCE is present we do not
+//    issue a warning; the expectation is that the source is being
+//    transitioned to use the new macro.
+
+// If _GNU_SOURCE was defined by the user, turn on all the other features.
+
+// If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
+//    define _DEFAULT_SOURCE.
+
+// This is to enable the ISO C2X extension.
+
+// This is to enable the ISO C11 extension.
+
+// This is to enable the ISO C99 extension.
+
+// This is to enable the ISO C90 Amendment 1:1995 extension.
+
+// If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
+//    is defined, use POSIX.1-2008 (or another version depending on
+//    _XOPEN_SOURCE).
+
+// Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
+//    defined in all multithreaded code.  GNU libc has not required this
+//    for many years.  We now treat them as compatibility synonyms for
+//    _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
+//    comprehensive support for multithreaded code.  Using them never
+//    lowers the selected level of POSIX conformance, only raises it.
+
+// The function 'gets' existed in C89, but is impossible to use
+//    safely.  It has been removed from ISO C11 and ISO C++14.  Note: for
+//    compatibility with various implementations of <cstdio>, this test
+//    must consider only the value of __cplusplus when compiling C++.
+
+// GNU formerly extended the scanf functions with modified format
+//    specifiers %as, %aS, and %a[...] that allocate a buffer for the
+//    input using malloc.  This extension conflicts with ISO C99, which
+//    defines %a as a standalone format specifier that reads a floating-
+//    point number; moreover, POSIX.1-2008 provides the same feature
+//    using the modifier letter 'm' instead (%ms, %mS, %m[...]).
+//
+//    We now follow C99 unless GNU extensions are active and the compiler
+//    is specifically in C89 or C++98 mode (strict or not).  For
+//    instance, with GCC, -std=gnu11 will have C99-compliant scanf with
+//    or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the
+//    old extension.
+
+// Get definitions of __STDC_* predefined macros, if the compiler has
+//    not preincluded this header automatically.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This macro indicates that the installed library is the GNU C Library.
+//    For historic reasons the value now is 6 and this will stay from now
+//    on.  The use of this variable is deprecated.  Use __GLIBC__ and
+//    __GLIBC_MINOR__ now (see below) when you want to test for a specific
+//    GNU C library version and use the values in <gnu/lib-names.h> to get
+//    the sonames of the shared libraries.
+
+// Major and minor version number of the GNU C library package.  Use
+//    these macros to test for features in specific releases.
+
+// This is here only because every header file already includes this one.
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// We are almost always included from features.h.
+
+// The GNU libc does not support any K&R compilers or the traditional mode
+//    of ISO C compilers anymore.  Check for some of the combinations not
+//    anymore supported.
+
+// Some user header file might have defined this before.
+
+// All functions, except those with callbacks or those that
+//    synchronize memory, are leaf functions.
+
+// GCC can always grok prototypes.  For C++ programs we add throw()
+//    to help it optimize the function calls.  But this works only with
+//    gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
+//    as non-throwing using a function attribute since programs can use
+//    the -fexceptions options for C code as well.
+
+// Compilers that are not clang may object to
+//        #if defined __clang__ && __has_extension(...)
+//    even though they do not need to evaluate the right-hand side of the &&.
+
+// These two macros are not used in glibc anymore.  They are kept here
+//    only because some other projects expect the macros to be defined.
+
+// For these things, GCC behaves the ANSI way normally,
+//    and the non-ANSI way under -traditional.
+
+// This is not a typedef so `const __ptr_t' does the right thing.
+
+// C++ needs to know that types and declarations are C, not C++.
+
+// Fortify support.
+
+// Support for flexible arrays.
+//    Headers that should use flexible arrays only if they're "real"
+//    (e.g. only if they won't affect sizeof()) should test
+//    #if __glibc_c99_flexarr_available.
+
+// __asm__ ("xyz") is used throughout the headers to rename functions
+//    at the assembly language level.  This is wrapped by the __REDIRECT
+//    macro, in order to support compilers that can do this some other
+//    way.  When compilers don't support asm-names at all, we have to do
+//    preprocessor tricks instead (which don't have exactly the right
+//    semantics, but it's the best we can do).
+//
+//    Example:
+//    int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid);
+
+//
+// #elif __SOME_OTHER_COMPILER__
+//
+// # define __REDIRECT(name, proto, alias) name proto; 	_Pragma("let " #name " = " #alias)
+
+// GCC has various useful declarations that can be made with the
+//    `__attribute__' syntax.  All of the ways we use this do fine if
+//    they are omitted for compilers that don't understand it.
+
+// At some point during the gcc 2.96 development the `malloc' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Tell the compiler which arguments to an allocation function
+//    indicate the size of the allocation.
+
+// At some point during the gcc 2.96 development the `pure' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// This declaration tells the compiler that the value is constant.
+
+// At some point during the gcc 3.1 development the `used' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Since version 3.2, gcc allows marking deprecated functions.
+
+// Since version 4.5, gcc also allows one to specify the message printed
+//    when a deprecated function is used.  clang claims to be gcc 4.2, but
+//    may also support this feature.
+
+// At some point during the gcc 2.8 development the `format_arg' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+//    If several `format_arg' attributes are given for the same function, in
+//    gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
+//    all designated arguments are considered.
+
+// At some point during the gcc 2.97 development the `strfmon' format
+//    attribute for functions was introduced.  We don't want to use it
+//    unconditionally (although this would be possible) since it
+//    generates warnings.
+
+// The nonull function attribute allows to mark pointer parameters which
+//    must not be NULL.
+
+// If fortification mode, we warn about unused results of certain
+//    function calls which can lead to problems.
+
+// Forces a function to be always inlined.
+// The Linux kernel defines __always_inline in stddef.h (283d7573), and
+//    it conflicts with this definition.  Therefore undefine it first to
+//    allow either header to be included first.
+
+// Associate error messages with the source location of the call site rather
+//    than with the source location inside the function.
+
+// GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+//    inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__
+//    or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions
+//    older than 4.3 may define these macros and still not guarantee GNU inlining
+//    semantics.
+//
+//    clang++ identifies itself as gcc-4.2, but has support for GNU inlining
+//    semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and
+//    __GNUC_GNU_INLINE__ macro definitions.
+
+// GCC 4.3 and above allow passing all anonymous arguments of an
+//    __extern_always_inline function to some other vararg function.
+
+// It is possible to compile containing GCC extensions even if GCC is
+//    run in pedantic mode if the uses are carefully marked using the
+//    `__extension__' keyword.  But this is not generally available before
+//    version 2.8.
+
+// __restrict is known in EGCS 1.2 and above.
+
+// ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
+//      array_name[restrict]
+//    GCC 3.1 supports this.
+
+// Describes a char array whose address can safely be passed as the first
+//    argument to strncpy and strncat, as the char array is not necessarily
+//    a NUL-terminated string.
+
+// Undefine (also defined in libc-symbols.h).
+// Copies attributes from the declaration or type referenced by
+//    the argument.
+
+// Determine the wordsize from the preprocessor defines.
+
+// Both x86-64 and x32 use the 64-bit system call interface.
+// Properties of long double type.  ldbl-96 version.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License  published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// long double is distinct from double, so there is nothing to
+//    define here.
+
+// __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is
+//    intended for use in preprocessor macros.
+//
+//    Note: MESSAGE must be a _single_ string; concatenation of string
+//    literals is not supported.
+
+// Generic selection (ISO C11) is a C-only feature, available in GCC
+//    since version 4.9.  Previous versions do not provide generic
+//    selection, even though they might set __STDC_VERSION__ to 201112L,
+//    when in -std=c11 mode.  Thus, we must check for !defined __GNUC__
+//    when testing __STDC_VERSION__ for generic selection support.
+//    On the other hand, Clang also defines __GNUC__, so a clang-specific
+//    check is required to enable the use of generic selection.
+
+// If we don't have __REDIRECT, prototypes will be missing if
+//    __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64].
+
+// Decide whether we can define 'extern inline' functions in headers.
+
+// This is here only because every header file already includes this one.
+//    Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
+//    <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
+//    that will always return failure (and set errno to ENOSYS).
+// This file is automatically generated.
+//    This file selects the right generated file of `__stub_FUNCTION' macros
+//    based on the architecture being compiled for.
+
+// This file is automatically generated.
+//    It defines a symbol `__stub_FUNCTION' for each function
+//    in the C library which is a stub, meaning it will fail
+//    every time called, usually setting errno to ENOSYS.
+
+// ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
+//    macro.
+
+// ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
+//    macro.  Most but not all symbols enabled by that macro in TS
+//    18661-1 are enabled unconditionally in C2X; the symbols in Annex F
+//    still require that macro in C2X.
+
+// ISO/IEC TS 18661-4:2015 defines the
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__ macro.  Other than the reduction
+//    functions, the symbols from this TS are enabled unconditionally in
+//    C2X.
+
+// ISO/IEC TS 18661-3:2015 defines the
+//    __STDC_WANT_IEC_60559_TYPES_EXT__ macro.
+
+// Maximum length of any multibyte character in any locale.
+//    We define this value here since the gcc header does not define
+//    the correct value.
+
+// If we are not using GNU CC we have to define all the symbols ourself.
+//    Otherwise use gcc's definitions (see below).
+
+// Get the compiler's limits.h, which defines almost all the ISO constants.
+//
+//     We put this #include_next outside the double inclusion check because
+//     it should be possible to include this file more than once and still get
+//     the definitions from gcc's header.
+
+// The <limits.h> files in some gcc versions don't define LLONG_MIN,
+//    LLONG_MAX, and ULLONG_MAX.  Instead only the values gcc defined for
+//    ages are available.
+
+// The integer width macros are not defined by GCC's <limits.h> before
+//    GCC 7, or if _GNU_SOURCE rather than
+//    __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature.
+
+// POSIX adds things to <limits.h>.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
+//
+//	Never include this file directly; use <limits.h> instead.
+
+// Determine the wordsize from the preprocessor defines.
+
+// Both x86-64 and x32 use the 64-bit system call interface.
+
+// These are the standard-mandated minimum values.
+
+// Minimum number of operations in one list I/O call.
+
+// Minimal number of outstanding asynchronous I/O operations.
+
+// Maximum length of arguments to `execve', including environment.
+
+// Maximum simultaneous processes per real user ID.
+
+// Minimal number of timer expiration overruns.
+
+// Maximum length of a host name (not including the terminating null)
+//    as returned from the GETHOSTNAME function.
+
+// Maximum link count of a file.
+
+// Maximum length of login name.
+
+// Number of bytes in a terminal canonical input queue.
+
+// Number of bytes for which space will be
+//    available in a terminal input queue.
+
+// Maximum number of message queues open for a process.
+
+// Maximum number of supported message priorities.
+
+// Number of bytes in a filename.
+
+// Number of simultaneous supplementary group IDs per process.
+
+// Number of files one process can have open at once.
+
+// Number of bytes in a pathname.
+
+// Number of bytes than can be written atomically to a pipe.
+
+// The number of repeated occurrences of a BRE permitted by the
+//    REGEXEC and REGCOMP functions when using the interval notation.
+
+// Minimal number of realtime signals reserved for the application.
+
+// Number of semaphores a process can have.
+
+// Maximal value of a semaphore.
+
+// Number of pending realtime signals.
+
+// Largest value of a `ssize_t'.
+
+// Number of streams a process can have open at once.
+
+// The number of bytes in a symbolic link.
+
+// The number of symbolic links that can be traversed in the
+//    resolution of a pathname in the absence of a loop.
+
+// Number of timer for a process.
+
+// Maximum number of characters in a tty name.
+
+// Maximum length of a timezone name (element of `tzname').
+
+// Maximum clock resolution in nanoseconds.
+
+// Get the implementation-specific values for the above.
+// Minimum guaranteed maximum values for system limits.  Linux version.
+//    Copyright (C) 1993-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public License as
+//    published by the Free Software Foundation; either version 2.1 of the
+//    License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; see the file COPYING.LIB.  If
+//    not, see <https://www.gnu.org/licenses/>.
+
+// The kernel header pollutes the namespace with the NR_OPEN symbol
+//    and defines LINK_MAX although filesystems have different maxima.  A
+//    similar thing is true for OPEN_MAX: the limit can be changed at
+//    runtime and therefore the macro must not be defined.  Remove this
+//    after including the header if necessary.
+
+// The kernel sources contain a file with all the needed information.
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+// Have to remove NR_OPEN?
+// Have to remove LINK_MAX?
+// Have to remove OPEN_MAX?
+// Have to remove ARG_MAX?
+
+// The number of data keys per process.
+// This is the value this implementation supports.
+
+// Controlling the iterations of destructors for thread-specific data.
+// Number of iterations this implementation does.
+
+// The number of threads per process.
+// We have no predefined limit on the number of threads.
+
+// Maximum amount by which a process can descrease its asynchronous I/O
+//    priority level.
+
+// Minimum size for a thread.  We are free to choose a reasonable value.
+
+// Maximum number of timer expiration overruns.
+
+// Maximum tty name length.
+
+// Maximum login name length.  This is arbitrary.
+
+// Maximum host name length.
+
+// Maximum message queue priority level.
+
+// Maximum value the semaphore can have.
+
+// ssize_t is not formally required to be the signed type
+//    corresponding to size_t, but it is for all configurations supported
+//    by glibc.
+
+// This value is a guaranteed minimum maximum.
+//    The current maximum can be got from `sysconf'.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Never include this file directly; include <limits.h> instead.
+
+// The maximum `ibase' and `obase' values allowed by the `bc' utility.
+
+// The maximum number of elements allowed in an array by the `bc' utility.
+
+// The maximum `scale' value allowed by the `bc' utility.
+
+// The maximum length of a string constant accepted by the `bc' utility.
+
+// The maximum number of weights that can be assigned to an entry of
+//    the LC_COLLATE `order' keyword in the locale definition file.
+
+// The maximum number of expressions that can be nested
+//    within parentheses by the `expr' utility.
+
+// The maximum length, in bytes, of an input line.
+
+// The maximum number of repeated occurrences of a regular expression
+//    permitted when using the interval notation `\{M,N\}'.
+
+// The maximum number of bytes in a character class name.  We have no
+//    fixed limit, 2048 is a high number.
+
+// These values are implementation-specific,
+//    and may vary within the implementation.
+//    Their precise values can be obtained from sysconf.
+
+// This value is defined like this in regex.h.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_linux_arm.go b/vendor/modernc.org/libc/limits/limits_linux_arm.go
new file mode 100644
index 00000000..cb71184c
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_linux_arm.go
@@ -0,0 +1,976 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_arm.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	AIO_PRIO_DELTA_MAX                   = 20
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 2048
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 255
+	CHAR_MIN                             = 0
+	COLL_WEIGHTS_MAX                     = 255
+	DELAYTIMER_MAX                       = 2147483647
+	EXPR_NEST_MAX                        = 32
+	HOST_NAME_MAX                        = 64
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 256
+	LONG_MAX                             = 2147483647
+	LONG_MIN                             = -2147483648
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 16
+	MQ_PRIO_MAX                          = 32768
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 65536
+	PATH_MAX                             = 4096
+	PIPE_BUF                             = 4096
+	PTHREAD_DESTRUCTOR_ITERATIONS        = 4
+	PTHREAD_KEYS_MAX                     = 1024
+	PTHREAD_STACK_MIN                    = 16384
+	RE_DUP_MAX                           = 32767
+	RTSIG_MAX                            = 32
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SEM_VALUE_MAX                        = 2147483647
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SSIZE_MAX                            = 2147483647
+	TTY_NAME_MAX                         = 32
+	UCHAR_MAX                            = 255
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 4294967295
+	USHRT_MAX                            = 65535
+	XATTR_LIST_MAX                       = 65536
+	XATTR_NAME_MAX                       = 255
+	XATTR_SIZE_MAX                       = 65536
+	X_ATFILE_SOURCE                      = 1
+	X_BITS_POSIX1_LIM_H                  = 1
+	X_BITS_POSIX2_LIM_H                  = 1
+	X_DEFAULT_SOURCE                     = 1
+	X_FEATURES_H                         = 1
+	X_FILE_OFFSET_BITS                   = 64
+	X_GCC_LIMITS_H_                      = 0
+	X_LIBC_LIMITS_H_                     = 1
+	X_LIMITS_H___                        = 0
+	X_LINUX_LIMITS_H                     = 0
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_C_SOURCE                     = 200809
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SOURCE                       = 1
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_STDC_PREDEF_H                      = 1
+	X_SYS_CDEFS_H                        = 1
+	Linux                                = 1
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int32 /* <builtin>:3:26 */
+
+type Size_t = uint32 /* <builtin>:9:23 */
+
+type Wchar_t = uint32 /* <builtin>:15:24 */
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types	<limits.h>
+
+// Handle feature test macros at the start of a header.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This header is internal to glibc and should not be included outside
+//    of glibc headers.  Headers including it must define
+//    __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first.  This header
+//    cannot have multiple include guards because ISO C feature test
+//    macros depend on the definition of the macro when an affected
+//    header is included, not when the first system header is
+//    included.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are defined by the user (or the compiler)
+//    to specify the desired environment:
+//
+//    __STRICT_ANSI__	ISO Standard C.
+//    _ISOC99_SOURCE	Extensions to ISO C89 from ISO C99.
+//    _ISOC11_SOURCE	Extensions to ISO C99 from ISO C11.
+//    _ISOC2X_SOURCE	Extensions to ISO C99 from ISO C2X.
+//    __STDC_WANT_LIB_EXT2__
+// 			Extensions to ISO C99 from TR 27431-2:2010.
+//    __STDC_WANT_IEC_60559_BFP_EXT__
+// 			Extensions to ISO C11 from TS 18661-1:2014.
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__
+// 			Extensions to ISO C11 from TS 18661-4:2015.
+//    __STDC_WANT_IEC_60559_TYPES_EXT__
+// 			Extensions to ISO C11 from TS 18661-3:2015.
+//
+//    _POSIX_SOURCE	IEEE Std 1003.1.
+//    _POSIX_C_SOURCE	If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
+// 			if >=199309L, add IEEE Std 1003.1b-1993;
+// 			if >=199506L, add IEEE Std 1003.1c-1995;
+// 			if >=200112L, all of IEEE 1003.1-2004
+// 			if >=200809L, all of IEEE 1003.1-2008
+//    _XOPEN_SOURCE	Includes POSIX and XPG things.  Set to 500 if
+// 			Single Unix conformance is wanted, to 600 for the
+// 			sixth revision, to 700 for the seventh revision.
+//    _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
+//    _LARGEFILE_SOURCE	Some more functions for correct standard I/O.
+//    _LARGEFILE64_SOURCE	Additional functionality from LFS for large files.
+//    _FILE_OFFSET_BITS=N	Select default filesystem interface.
+//    _ATFILE_SOURCE	Additional *at interfaces.
+//    _GNU_SOURCE		All of the above, plus GNU extensions.
+//    _DEFAULT_SOURCE	The default set of features (taking precedence over
+// 			__STRICT_ANSI__).
+//
+//    _FORTIFY_SOURCE	Add security hardening to many library functions.
+// 			Set to 1 or 2; 2 performs stricter checks than 1.
+//
+//    _REENTRANT, _THREAD_SAFE
+// 			Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
+//
+//    The `-ansi' switch to the GNU C compiler, and standards conformance
+//    options such as `-std=c99', define __STRICT_ANSI__.  If none of
+//    these are defined, or if _DEFAULT_SOURCE is defined, the default is
+//    to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
+//    200809L, as well as enabling miscellaneous functions from BSD and
+//    SVID.  If more than one of these are defined, they accumulate.  For
+//    example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
+//    give you ISO C, 1003.1, and 1003.2, but nothing else.
+//
+//    These are defined by this file and are used by the
+//    header files to decide what to declare or define:
+//
+//    __GLIBC_USE (F)	Define things from feature set F.  This is defined
+// 			to 1 or 0; the subsequent macros are either defined
+// 			or undefined, and those tests should be moved to
+// 			__GLIBC_USE.
+//    __USE_ISOC11		Define ISO C11 things.
+//    __USE_ISOC99		Define ISO C99 things.
+//    __USE_ISOC95		Define ISO C90 AMD1 (C95) things.
+//    __USE_ISOCXX11	Define ISO C++11 things.
+//    __USE_POSIX		Define IEEE Std 1003.1 things.
+//    __USE_POSIX2		Define IEEE Std 1003.2 things.
+//    __USE_POSIX199309	Define IEEE Std 1003.1, and .1b things.
+//    __USE_POSIX199506	Define IEEE Std 1003.1, .1b, .1c and .1i things.
+//    __USE_XOPEN		Define XPG things.
+//    __USE_XOPEN_EXTENDED	Define X/Open Unix things.
+//    __USE_UNIX98		Define Single Unix V2 things.
+//    __USE_XOPEN2K        Define XPG6 things.
+//    __USE_XOPEN2KXSI     Define XPG6 XSI things.
+//    __USE_XOPEN2K8       Define XPG7 things.
+//    __USE_XOPEN2K8XSI    Define XPG7 XSI things.
+//    __USE_LARGEFILE	Define correct standard I/O things.
+//    __USE_LARGEFILE64	Define LFS things with separate names.
+//    __USE_FILE_OFFSET64	Define 64bit interface as default.
+//    __USE_MISC		Define things from 4.3BSD or System V Unix.
+//    __USE_ATFILE		Define *at interfaces and AT_* constants for them.
+//    __USE_GNU		Define GNU extensions.
+//    __USE_FORTIFY_LEVEL	Additional security measures used, according to level.
+//
+//    The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
+//    defined by this file unconditionally.  `__GNU_LIBRARY__' is provided
+//    only for compatibility.  All new code should use the other symbols
+//    to test for features.
+//
+//    All macros listed above as possibly being defined by this file are
+//    explicitly undefined if they are not explicitly defined.
+//    Feature-test macros that are not defined by the user or compiler
+//    but are implied by the other feature-test macros defined (or by the
+//    lack of any definitions) are defined by the file.
+//
+//    ISO C feature test macros depend on the definition of the macro
+//    when an affected header is included, not when the first system
+//    header is included, and so they are handled in
+//    <bits/libc-header-start.h>, which does not have a multiple include
+//    guard.  Feature test macros that can be handled from the first
+//    system header included are handled here.
+
+// Undefine everything, so we get a clean slate.
+
+// Suppress kernel-name space pollution unless user expressedly asks
+//    for it.
+
+// Convenience macro to test the version of gcc.
+//    Use like this:
+//    #if __GNUC_PREREQ (2,8)
+//    ... code requiring gcc 2.8 or later ...
+//    #endif
+//    Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
+//    added in 2.0.
+
+// Similarly for clang.  Features added to GCC after version 4.2 may
+//    or may not also be available in clang, and clang's definitions of
+//    __GNUC(_MINOR)__ are fixed at 4 and 2 respectively.  Not all such
+//    features can be queried via __has_extension/__has_feature.
+
+// Whether to use feature set F.
+
+// _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
+//    _DEFAULT_SOURCE.  If _DEFAULT_SOURCE is present we do not
+//    issue a warning; the expectation is that the source is being
+//    transitioned to use the new macro.
+
+// If _GNU_SOURCE was defined by the user, turn on all the other features.
+
+// If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
+//    define _DEFAULT_SOURCE.
+
+// This is to enable the ISO C2X extension.
+
+// This is to enable the ISO C11 extension.
+
+// This is to enable the ISO C99 extension.
+
+// This is to enable the ISO C90 Amendment 1:1995 extension.
+
+// If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
+//    is defined, use POSIX.1-2008 (or another version depending on
+//    _XOPEN_SOURCE).
+
+// Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
+//    defined in all multithreaded code.  GNU libc has not required this
+//    for many years.  We now treat them as compatibility synonyms for
+//    _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
+//    comprehensive support for multithreaded code.  Using them never
+//    lowers the selected level of POSIX conformance, only raises it.
+
+// The function 'gets' existed in C89, but is impossible to use
+//    safely.  It has been removed from ISO C11 and ISO C++14.  Note: for
+//    compatibility with various implementations of <cstdio>, this test
+//    must consider only the value of __cplusplus when compiling C++.
+
+// GNU formerly extended the scanf functions with modified format
+//    specifiers %as, %aS, and %a[...] that allocate a buffer for the
+//    input using malloc.  This extension conflicts with ISO C99, which
+//    defines %a as a standalone format specifier that reads a floating-
+//    point number; moreover, POSIX.1-2008 provides the same feature
+//    using the modifier letter 'm' instead (%ms, %mS, %m[...]).
+//
+//    We now follow C99 unless GNU extensions are active and the compiler
+//    is specifically in C89 or C++98 mode (strict or not).  For
+//    instance, with GCC, -std=gnu11 will have C99-compliant scanf with
+//    or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the
+//    old extension.
+
+// Get definitions of __STDC_* predefined macros, if the compiler has
+//    not preincluded this header automatically.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This macro indicates that the installed library is the GNU C Library.
+//    For historic reasons the value now is 6 and this will stay from now
+//    on.  The use of this variable is deprecated.  Use __GLIBC__ and
+//    __GLIBC_MINOR__ now (see below) when you want to test for a specific
+//    GNU C library version and use the values in <gnu/lib-names.h> to get
+//    the sonames of the shared libraries.
+
+// Major and minor version number of the GNU C library package.  Use
+//    these macros to test for features in specific releases.
+
+// This is here only because every header file already includes this one.
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// We are almost always included from features.h.
+
+// The GNU libc does not support any K&R compilers or the traditional mode
+//    of ISO C compilers anymore.  Check for some of the combinations not
+//    anymore supported.
+
+// Some user header file might have defined this before.
+
+// All functions, except those with callbacks or those that
+//    synchronize memory, are leaf functions.
+
+// GCC can always grok prototypes.  For C++ programs we add throw()
+//    to help it optimize the function calls.  But this works only with
+//    gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
+//    as non-throwing using a function attribute since programs can use
+//    the -fexceptions options for C code as well.
+
+// Compilers that are not clang may object to
+//        #if defined __clang__ && __has_extension(...)
+//    even though they do not need to evaluate the right-hand side of the &&.
+
+// These two macros are not used in glibc anymore.  They are kept here
+//    only because some other projects expect the macros to be defined.
+
+// For these things, GCC behaves the ANSI way normally,
+//    and the non-ANSI way under -traditional.
+
+// This is not a typedef so `const __ptr_t' does the right thing.
+
+// C++ needs to know that types and declarations are C, not C++.
+
+// Fortify support.
+
+// Support for flexible arrays.
+//    Headers that should use flexible arrays only if they're "real"
+//    (e.g. only if they won't affect sizeof()) should test
+//    #if __glibc_c99_flexarr_available.
+
+// __asm__ ("xyz") is used throughout the headers to rename functions
+//    at the assembly language level.  This is wrapped by the __REDIRECT
+//    macro, in order to support compilers that can do this some other
+//    way.  When compilers don't support asm-names at all, we have to do
+//    preprocessor tricks instead (which don't have exactly the right
+//    semantics, but it's the best we can do).
+//
+//    Example:
+//    int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid);
+
+//
+// #elif __SOME_OTHER_COMPILER__
+//
+// # define __REDIRECT(name, proto, alias) name proto; 	_Pragma("let " #name " = " #alias)
+
+// GCC has various useful declarations that can be made with the
+//    `__attribute__' syntax.  All of the ways we use this do fine if
+//    they are omitted for compilers that don't understand it.
+
+// At some point during the gcc 2.96 development the `malloc' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Tell the compiler which arguments to an allocation function
+//    indicate the size of the allocation.
+
+// At some point during the gcc 2.96 development the `pure' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// This declaration tells the compiler that the value is constant.
+
+// At some point during the gcc 3.1 development the `used' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Since version 3.2, gcc allows marking deprecated functions.
+
+// Since version 4.5, gcc also allows one to specify the message printed
+//    when a deprecated function is used.  clang claims to be gcc 4.2, but
+//    may also support this feature.
+
+// At some point during the gcc 2.8 development the `format_arg' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+//    If several `format_arg' attributes are given for the same function, in
+//    gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
+//    all designated arguments are considered.
+
+// At some point during the gcc 2.97 development the `strfmon' format
+//    attribute for functions was introduced.  We don't want to use it
+//    unconditionally (although this would be possible) since it
+//    generates warnings.
+
+// The nonull function attribute allows to mark pointer parameters which
+//    must not be NULL.
+
+// If fortification mode, we warn about unused results of certain
+//    function calls which can lead to problems.
+
+// Forces a function to be always inlined.
+// The Linux kernel defines __always_inline in stddef.h (283d7573), and
+//    it conflicts with this definition.  Therefore undefine it first to
+//    allow either header to be included first.
+
+// Associate error messages with the source location of the call site rather
+//    than with the source location inside the function.
+
+// GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+//    inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__
+//    or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions
+//    older than 4.3 may define these macros and still not guarantee GNU inlining
+//    semantics.
+//
+//    clang++ identifies itself as gcc-4.2, but has support for GNU inlining
+//    semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and
+//    __GNUC_GNU_INLINE__ macro definitions.
+
+// GCC 4.3 and above allow passing all anonymous arguments of an
+//    __extern_always_inline function to some other vararg function.
+
+// It is possible to compile containing GCC extensions even if GCC is
+//    run in pedantic mode if the uses are carefully marked using the
+//    `__extension__' keyword.  But this is not generally available before
+//    version 2.8.
+
+// __restrict is known in EGCS 1.2 and above.
+
+// ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
+//      array_name[restrict]
+//    GCC 3.1 supports this.
+
+// Describes a char array whose address can safely be passed as the first
+//    argument to strncpy and strncat, as the char array is not necessarily
+//    a NUL-terminated string.
+
+// Undefine (also defined in libc-symbols.h).
+// Copies attributes from the declaration or type referenced by
+//    the argument.
+
+// Copyright (C) 1999-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Properties of long double type.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License  published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This header is included by <sys/cdefs.h>.
+//
+//    If long double is ABI-compatible with double, it should define
+//    __NO_LONG_DOUBLE_MATH to 1; otherwise, it should leave
+//    __NO_LONG_DOUBLE_MATH undefined.
+//
+//    If this build of the GNU C Library supports both long double
+//    ABI-compatible with double and some other long double format not
+//    ABI-compatible with double, it should define
+//    __LONG_DOUBLE_MATH_OPTIONAL to 1; otherwise, it should leave
+//    __LONG_DOUBLE_MATH_OPTIONAL undefined.
+//
+//    If __NO_LONG_DOUBLE_MATH is already defined, this header must not
+//    define anything; this is needed to work with the definition of
+//    __NO_LONG_DOUBLE_MATH in nldbl-compat.h.
+
+// In the default version of this header, long double is
+//    ABI-compatible with double.
+
+// __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is
+//    intended for use in preprocessor macros.
+//
+//    Note: MESSAGE must be a _single_ string; concatenation of string
+//    literals is not supported.
+
+// Generic selection (ISO C11) is a C-only feature, available in GCC
+//    since version 4.9.  Previous versions do not provide generic
+//    selection, even though they might set __STDC_VERSION__ to 201112L,
+//    when in -std=c11 mode.  Thus, we must check for !defined __GNUC__
+//    when testing __STDC_VERSION__ for generic selection support.
+//    On the other hand, Clang also defines __GNUC__, so a clang-specific
+//    check is required to enable the use of generic selection.
+
+// If we don't have __REDIRECT, prototypes will be missing if
+//    __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64].
+
+// Decide whether we can define 'extern inline' functions in headers.
+
+// This is here only because every header file already includes this one.
+//    Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
+//    <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
+//    that will always return failure (and set errno to ENOSYS).
+// This file is automatically generated.
+//    This file selects the right generated file of `__stub_FUNCTION' macros
+//    based on the architecture being compiled for.
+
+// This file is automatically generated.
+//    It defines a symbol `__stub_FUNCTION' for each function
+//    in the C library which is a stub, meaning it will fail
+//    every time called, usually setting errno to ENOSYS.
+
+// ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
+//    macro.
+
+// ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
+//    macro.  Most but not all symbols enabled by that macro in TS
+//    18661-1 are enabled unconditionally in C2X; the symbols in Annex F
+//    still require that macro in C2X.
+
+// ISO/IEC TS 18661-4:2015 defines the
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__ macro.  Other than the reduction
+//    functions, the symbols from this TS are enabled unconditionally in
+//    C2X.
+
+// ISO/IEC TS 18661-3:2015 defines the
+//    __STDC_WANT_IEC_60559_TYPES_EXT__ macro.
+
+// Maximum length of any multibyte character in any locale.
+//    We define this value here since the gcc header does not define
+//    the correct value.
+
+// If we are not using GNU CC we have to define all the symbols ourself.
+//    Otherwise use gcc's definitions (see below).
+
+// Get the compiler's limits.h, which defines almost all the ISO constants.
+//
+//     We put this #include_next outside the double inclusion check because
+//     it should be possible to include this file more than once and still get
+//     the definitions from gcc's header.
+
+// The <limits.h> files in some gcc versions don't define LLONG_MIN,
+//    LLONG_MAX, and ULLONG_MAX.  Instead only the values gcc defined for
+//    ages are available.
+
+// The integer width macros are not defined by GCC's <limits.h> before
+//    GCC 7, or if _GNU_SOURCE rather than
+//    __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature.
+
+// POSIX adds things to <limits.h>.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
+//
+//	Never include this file directly; use <limits.h> instead.
+
+// Copyright (C) 1999-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are the standard-mandated minimum values.
+
+// Minimum number of operations in one list I/O call.
+
+// Minimal number of outstanding asynchronous I/O operations.
+
+// Maximum length of arguments to `execve', including environment.
+
+// Maximum simultaneous processes per real user ID.
+
+// Minimal number of timer expiration overruns.
+
+// Maximum length of a host name (not including the terminating null)
+//    as returned from the GETHOSTNAME function.
+
+// Maximum link count of a file.
+
+// Maximum length of login name.
+
+// Number of bytes in a terminal canonical input queue.
+
+// Number of bytes for which space will be
+//    available in a terminal input queue.
+
+// Maximum number of message queues open for a process.
+
+// Maximum number of supported message priorities.
+
+// Number of bytes in a filename.
+
+// Number of simultaneous supplementary group IDs per process.
+
+// Number of files one process can have open at once.
+
+// Number of bytes in a pathname.
+
+// Number of bytes than can be written atomically to a pipe.
+
+// The number of repeated occurrences of a BRE permitted by the
+//    REGEXEC and REGCOMP functions when using the interval notation.
+
+// Minimal number of realtime signals reserved for the application.
+
+// Number of semaphores a process can have.
+
+// Maximal value of a semaphore.
+
+// Number of pending realtime signals.
+
+// Largest value of a `ssize_t'.
+
+// Number of streams a process can have open at once.
+
+// The number of bytes in a symbolic link.
+
+// The number of symbolic links that can be traversed in the
+//    resolution of a pathname in the absence of a loop.
+
+// Number of timer for a process.
+
+// Maximum number of characters in a tty name.
+
+// Maximum length of a timezone name (element of `tzname').
+
+// Maximum clock resolution in nanoseconds.
+
+// Get the implementation-specific values for the above.
+// Minimum guaranteed maximum values for system limits.  Linux version.
+//    Copyright (C) 1993-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public License as
+//    published by the Free Software Foundation; either version 2.1 of the
+//    License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; see the file COPYING.LIB.  If
+//    not, see <https://www.gnu.org/licenses/>.
+
+// The kernel header pollutes the namespace with the NR_OPEN symbol
+//    and defines LINK_MAX although filesystems have different maxima.  A
+//    similar thing is true for OPEN_MAX: the limit can be changed at
+//    runtime and therefore the macro must not be defined.  Remove this
+//    after including the header if necessary.
+
+// The kernel sources contain a file with all the needed information.
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+// Have to remove NR_OPEN?
+// Have to remove LINK_MAX?
+// Have to remove OPEN_MAX?
+// Have to remove ARG_MAX?
+
+// The number of data keys per process.
+// This is the value this implementation supports.
+
+// Controlling the iterations of destructors for thread-specific data.
+// Number of iterations this implementation does.
+
+// The number of threads per process.
+// We have no predefined limit on the number of threads.
+
+// Maximum amount by which a process can descrease its asynchronous I/O
+//    priority level.
+
+// Minimum size for a thread.  We are free to choose a reasonable value.
+
+// Maximum number of timer expiration overruns.
+
+// Maximum tty name length.
+
+// Maximum login name length.  This is arbitrary.
+
+// Maximum host name length.
+
+// Maximum message queue priority level.
+
+// Maximum value the semaphore can have.
+
+// ssize_t is not formally required to be the signed type
+//    corresponding to size_t, but it is for all configurations supported
+//    by glibc.
+
+// This value is a guaranteed minimum maximum.
+//    The current maximum can be got from `sysconf'.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Never include this file directly; include <limits.h> instead.
+
+// The maximum `ibase' and `obase' values allowed by the `bc' utility.
+
+// The maximum number of elements allowed in an array by the `bc' utility.
+
+// The maximum `scale' value allowed by the `bc' utility.
+
+// The maximum length of a string constant accepted by the `bc' utility.
+
+// The maximum number of weights that can be assigned to an entry of
+//    the LC_COLLATE `order' keyword in the locale definition file.
+
+// The maximum number of expressions that can be nested
+//    within parentheses by the `expr' utility.
+
+// The maximum length, in bytes, of an input line.
+
+// The maximum number of repeated occurrences of a regular expression
+//    permitted when using the interval notation `\{M,N\}'.
+
+// The maximum number of bytes in a character class name.  We have no
+//    fixed limit, 2048 is a high number.
+
+// These values are implementation-specific,
+//    and may vary within the implementation.
+//    Their precise values can be obtained from sysconf.
+
+// This value is defined like this in regex.h.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ uint8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_linux_arm64.go b/vendor/modernc.org/libc/limits/limits_linux_arm64.go
new file mode 100644
index 00000000..c1f0aa10
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_linux_arm64.go
@@ -0,0 +1,995 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_arm64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	AIO_PRIO_DELTA_MAX                   = 20
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 2048
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 255
+	CHAR_MIN                             = 0
+	COLL_WEIGHTS_MAX                     = 255
+	DELAYTIMER_MAX                       = 2147483647
+	EXPR_NEST_MAX                        = 32
+	HOST_NAME_MAX                        = 64
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 256
+	LONG_MAX                             = 9223372036854775807
+	LONG_MIN                             = -9223372036854775808
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 16
+	MQ_PRIO_MAX                          = 32768
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 65536
+	PATH_MAX                             = 4096
+	PIPE_BUF                             = 4096
+	PTHREAD_DESTRUCTOR_ITERATIONS        = 4
+	PTHREAD_KEYS_MAX                     = 1024
+	PTHREAD_STACK_MIN                    = 131072
+	RE_DUP_MAX                           = 32767
+	RTSIG_MAX                            = 32
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SEM_VALUE_MAX                        = 2147483647
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SSIZE_MAX                            = 9223372036854775807
+	TTY_NAME_MAX                         = 32
+	UCHAR_MAX                            = 255
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 18446744073709551615
+	USHRT_MAX                            = 65535
+	XATTR_LIST_MAX                       = 65536
+	XATTR_NAME_MAX                       = 255
+	XATTR_SIZE_MAX                       = 65536
+	X_ATFILE_SOURCE                      = 1
+	X_BITS_POSIX1_LIM_H                  = 1
+	X_BITS_POSIX2_LIM_H                  = 1
+	X_DEFAULT_SOURCE                     = 1
+	X_FEATURES_H                         = 1
+	X_FILE_OFFSET_BITS                   = 64
+	X_GCC_LIMITS_H_                      = 0
+	X_LIBC_LIMITS_H_                     = 1
+	X_LIMITS_H___                        = 0
+	X_LINUX_LIMITS_H                     = 0
+	X_LP64                               = 1
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_C_SOURCE                     = 200809
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SOURCE                       = 1
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_STDC_PREDEF_H                      = 1
+	X_SYS_CDEFS_H                        = 1
+	Linux                                = 1
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = uint32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types	<limits.h>
+
+// Handle feature test macros at the start of a header.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This header is internal to glibc and should not be included outside
+//    of glibc headers.  Headers including it must define
+//    __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first.  This header
+//    cannot have multiple include guards because ISO C feature test
+//    macros depend on the definition of the macro when an affected
+//    header is included, not when the first system header is
+//    included.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are defined by the user (or the compiler)
+//    to specify the desired environment:
+//
+//    __STRICT_ANSI__	ISO Standard C.
+//    _ISOC99_SOURCE	Extensions to ISO C89 from ISO C99.
+//    _ISOC11_SOURCE	Extensions to ISO C99 from ISO C11.
+//    _ISOC2X_SOURCE	Extensions to ISO C99 from ISO C2X.
+//    __STDC_WANT_LIB_EXT2__
+// 			Extensions to ISO C99 from TR 27431-2:2010.
+//    __STDC_WANT_IEC_60559_BFP_EXT__
+// 			Extensions to ISO C11 from TS 18661-1:2014.
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__
+// 			Extensions to ISO C11 from TS 18661-4:2015.
+//    __STDC_WANT_IEC_60559_TYPES_EXT__
+// 			Extensions to ISO C11 from TS 18661-3:2015.
+//
+//    _POSIX_SOURCE	IEEE Std 1003.1.
+//    _POSIX_C_SOURCE	If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
+// 			if >=199309L, add IEEE Std 1003.1b-1993;
+// 			if >=199506L, add IEEE Std 1003.1c-1995;
+// 			if >=200112L, all of IEEE 1003.1-2004
+// 			if >=200809L, all of IEEE 1003.1-2008
+//    _XOPEN_SOURCE	Includes POSIX and XPG things.  Set to 500 if
+// 			Single Unix conformance is wanted, to 600 for the
+// 			sixth revision, to 700 for the seventh revision.
+//    _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
+//    _LARGEFILE_SOURCE	Some more functions for correct standard I/O.
+//    _LARGEFILE64_SOURCE	Additional functionality from LFS for large files.
+//    _FILE_OFFSET_BITS=N	Select default filesystem interface.
+//    _ATFILE_SOURCE	Additional *at interfaces.
+//    _GNU_SOURCE		All of the above, plus GNU extensions.
+//    _DEFAULT_SOURCE	The default set of features (taking precedence over
+// 			__STRICT_ANSI__).
+//
+//    _FORTIFY_SOURCE	Add security hardening to many library functions.
+// 			Set to 1 or 2; 2 performs stricter checks than 1.
+//
+//    _REENTRANT, _THREAD_SAFE
+// 			Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
+//
+//    The `-ansi' switch to the GNU C compiler, and standards conformance
+//    options such as `-std=c99', define __STRICT_ANSI__.  If none of
+//    these are defined, or if _DEFAULT_SOURCE is defined, the default is
+//    to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
+//    200809L, as well as enabling miscellaneous functions from BSD and
+//    SVID.  If more than one of these are defined, they accumulate.  For
+//    example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
+//    give you ISO C, 1003.1, and 1003.2, but nothing else.
+//
+//    These are defined by this file and are used by the
+//    header files to decide what to declare or define:
+//
+//    __GLIBC_USE (F)	Define things from feature set F.  This is defined
+// 			to 1 or 0; the subsequent macros are either defined
+// 			or undefined, and those tests should be moved to
+// 			__GLIBC_USE.
+//    __USE_ISOC11		Define ISO C11 things.
+//    __USE_ISOC99		Define ISO C99 things.
+//    __USE_ISOC95		Define ISO C90 AMD1 (C95) things.
+//    __USE_ISOCXX11	Define ISO C++11 things.
+//    __USE_POSIX		Define IEEE Std 1003.1 things.
+//    __USE_POSIX2		Define IEEE Std 1003.2 things.
+//    __USE_POSIX199309	Define IEEE Std 1003.1, and .1b things.
+//    __USE_POSIX199506	Define IEEE Std 1003.1, .1b, .1c and .1i things.
+//    __USE_XOPEN		Define XPG things.
+//    __USE_XOPEN_EXTENDED	Define X/Open Unix things.
+//    __USE_UNIX98		Define Single Unix V2 things.
+//    __USE_XOPEN2K        Define XPG6 things.
+//    __USE_XOPEN2KXSI     Define XPG6 XSI things.
+//    __USE_XOPEN2K8       Define XPG7 things.
+//    __USE_XOPEN2K8XSI    Define XPG7 XSI things.
+//    __USE_LARGEFILE	Define correct standard I/O things.
+//    __USE_LARGEFILE64	Define LFS things with separate names.
+//    __USE_FILE_OFFSET64	Define 64bit interface as default.
+//    __USE_MISC		Define things from 4.3BSD or System V Unix.
+//    __USE_ATFILE		Define *at interfaces and AT_* constants for them.
+//    __USE_GNU		Define GNU extensions.
+//    __USE_FORTIFY_LEVEL	Additional security measures used, according to level.
+//
+//    The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
+//    defined by this file unconditionally.  `__GNU_LIBRARY__' is provided
+//    only for compatibility.  All new code should use the other symbols
+//    to test for features.
+//
+//    All macros listed above as possibly being defined by this file are
+//    explicitly undefined if they are not explicitly defined.
+//    Feature-test macros that are not defined by the user or compiler
+//    but are implied by the other feature-test macros defined (or by the
+//    lack of any definitions) are defined by the file.
+//
+//    ISO C feature test macros depend on the definition of the macro
+//    when an affected header is included, not when the first system
+//    header is included, and so they are handled in
+//    <bits/libc-header-start.h>, which does not have a multiple include
+//    guard.  Feature test macros that can be handled from the first
+//    system header included are handled here.
+
+// Undefine everything, so we get a clean slate.
+
+// Suppress kernel-name space pollution unless user expressedly asks
+//    for it.
+
+// Convenience macro to test the version of gcc.
+//    Use like this:
+//    #if __GNUC_PREREQ (2,8)
+//    ... code requiring gcc 2.8 or later ...
+//    #endif
+//    Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
+//    added in 2.0.
+
+// Similarly for clang.  Features added to GCC after version 4.2 may
+//    or may not also be available in clang, and clang's definitions of
+//    __GNUC(_MINOR)__ are fixed at 4 and 2 respectively.  Not all such
+//    features can be queried via __has_extension/__has_feature.
+
+// Whether to use feature set F.
+
+// _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
+//    _DEFAULT_SOURCE.  If _DEFAULT_SOURCE is present we do not
+//    issue a warning; the expectation is that the source is being
+//    transitioned to use the new macro.
+
+// If _GNU_SOURCE was defined by the user, turn on all the other features.
+
+// If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
+//    define _DEFAULT_SOURCE.
+
+// This is to enable the ISO C2X extension.
+
+// This is to enable the ISO C11 extension.
+
+// This is to enable the ISO C99 extension.
+
+// This is to enable the ISO C90 Amendment 1:1995 extension.
+
+// If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
+//    is defined, use POSIX.1-2008 (or another version depending on
+//    _XOPEN_SOURCE).
+
+// Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
+//    defined in all multithreaded code.  GNU libc has not required this
+//    for many years.  We now treat them as compatibility synonyms for
+//    _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
+//    comprehensive support for multithreaded code.  Using them never
+//    lowers the selected level of POSIX conformance, only raises it.
+
+// The function 'gets' existed in C89, but is impossible to use
+//    safely.  It has been removed from ISO C11 and ISO C++14.  Note: for
+//    compatibility with various implementations of <cstdio>, this test
+//    must consider only the value of __cplusplus when compiling C++.
+
+// GNU formerly extended the scanf functions with modified format
+//    specifiers %as, %aS, and %a[...] that allocate a buffer for the
+//    input using malloc.  This extension conflicts with ISO C99, which
+//    defines %a as a standalone format specifier that reads a floating-
+//    point number; moreover, POSIX.1-2008 provides the same feature
+//    using the modifier letter 'm' instead (%ms, %mS, %m[...]).
+//
+//    We now follow C99 unless GNU extensions are active and the compiler
+//    is specifically in C89 or C++98 mode (strict or not).  For
+//    instance, with GCC, -std=gnu11 will have C99-compliant scanf with
+//    or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the
+//    old extension.
+
+// Get definitions of __STDC_* predefined macros, if the compiler has
+//    not preincluded this header automatically.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This macro indicates that the installed library is the GNU C Library.
+//    For historic reasons the value now is 6 and this will stay from now
+//    on.  The use of this variable is deprecated.  Use __GLIBC__ and
+//    __GLIBC_MINOR__ now (see below) when you want to test for a specific
+//    GNU C library version and use the values in <gnu/lib-names.h> to get
+//    the sonames of the shared libraries.
+
+// Major and minor version number of the GNU C library package.  Use
+//    these macros to test for features in specific releases.
+
+// This is here only because every header file already includes this one.
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// We are almost always included from features.h.
+
+// The GNU libc does not support any K&R compilers or the traditional mode
+//    of ISO C compilers anymore.  Check for some of the combinations not
+//    anymore supported.
+
+// Some user header file might have defined this before.
+
+// All functions, except those with callbacks or those that
+//    synchronize memory, are leaf functions.
+
+// GCC can always grok prototypes.  For C++ programs we add throw()
+//    to help it optimize the function calls.  But this works only with
+//    gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
+//    as non-throwing using a function attribute since programs can use
+//    the -fexceptions options for C code as well.
+
+// Compilers that are not clang may object to
+//        #if defined __clang__ && __has_extension(...)
+//    even though they do not need to evaluate the right-hand side of the &&.
+
+// These two macros are not used in glibc anymore.  They are kept here
+//    only because some other projects expect the macros to be defined.
+
+// For these things, GCC behaves the ANSI way normally,
+//    and the non-ANSI way under -traditional.
+
+// This is not a typedef so `const __ptr_t' does the right thing.
+
+// C++ needs to know that types and declarations are C, not C++.
+
+// Fortify support.
+
+// Support for flexible arrays.
+//    Headers that should use flexible arrays only if they're "real"
+//    (e.g. only if they won't affect sizeof()) should test
+//    #if __glibc_c99_flexarr_available.
+
+// __asm__ ("xyz") is used throughout the headers to rename functions
+//    at the assembly language level.  This is wrapped by the __REDIRECT
+//    macro, in order to support compilers that can do this some other
+//    way.  When compilers don't support asm-names at all, we have to do
+//    preprocessor tricks instead (which don't have exactly the right
+//    semantics, but it's the best we can do).
+//
+//    Example:
+//    int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid);
+
+//
+// #elif __SOME_OTHER_COMPILER__
+//
+// # define __REDIRECT(name, proto, alias) name proto; 	_Pragma("let " #name " = " #alias)
+
+// GCC has various useful declarations that can be made with the
+//    `__attribute__' syntax.  All of the ways we use this do fine if
+//    they are omitted for compilers that don't understand it.
+
+// At some point during the gcc 2.96 development the `malloc' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Tell the compiler which arguments to an allocation function
+//    indicate the size of the allocation.
+
+// At some point during the gcc 2.96 development the `pure' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// This declaration tells the compiler that the value is constant.
+
+// At some point during the gcc 3.1 development the `used' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Since version 3.2, gcc allows marking deprecated functions.
+
+// Since version 4.5, gcc also allows one to specify the message printed
+//    when a deprecated function is used.  clang claims to be gcc 4.2, but
+//    may also support this feature.
+
+// At some point during the gcc 2.8 development the `format_arg' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+//    If several `format_arg' attributes are given for the same function, in
+//    gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
+//    all designated arguments are considered.
+
+// At some point during the gcc 2.97 development the `strfmon' format
+//    attribute for functions was introduced.  We don't want to use it
+//    unconditionally (although this would be possible) since it
+//    generates warnings.
+
+// The nonull function attribute allows to mark pointer parameters which
+//    must not be NULL.
+
+// If fortification mode, we warn about unused results of certain
+//    function calls which can lead to problems.
+
+// Forces a function to be always inlined.
+// The Linux kernel defines __always_inline in stddef.h (283d7573), and
+//    it conflicts with this definition.  Therefore undefine it first to
+//    allow either header to be included first.
+
+// Associate error messages with the source location of the call site rather
+//    than with the source location inside the function.
+
+// GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+//    inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__
+//    or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions
+//    older than 4.3 may define these macros and still not guarantee GNU inlining
+//    semantics.
+//
+//    clang++ identifies itself as gcc-4.2, but has support for GNU inlining
+//    semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and
+//    __GNUC_GNU_INLINE__ macro definitions.
+
+// GCC 4.3 and above allow passing all anonymous arguments of an
+//    __extern_always_inline function to some other vararg function.
+
+// It is possible to compile containing GCC extensions even if GCC is
+//    run in pedantic mode if the uses are carefully marked using the
+//    `__extension__' keyword.  But this is not generally available before
+//    version 2.8.
+
+// __restrict is known in EGCS 1.2 and above.
+
+// ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
+//      array_name[restrict]
+//    GCC 3.1 supports this.
+
+// Describes a char array whose address can safely be passed as the first
+//    argument to strncpy and strncat, as the char array is not necessarily
+//    a NUL-terminated string.
+
+// Undefine (also defined in libc-symbols.h).
+// Copies attributes from the declaration or type referenced by
+//    the argument.
+
+// Determine the wordsize from the preprocessor defines.
+//
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Properties of long double type.  ldbl-128 version.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License  published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// long double is distinct from double, so there is nothing to
+//    define here.
+
+// __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is
+//    intended for use in preprocessor macros.
+//
+//    Note: MESSAGE must be a _single_ string; concatenation of string
+//    literals is not supported.
+
+// Generic selection (ISO C11) is a C-only feature, available in GCC
+//    since version 4.9.  Previous versions do not provide generic
+//    selection, even though they might set __STDC_VERSION__ to 201112L,
+//    when in -std=c11 mode.  Thus, we must check for !defined __GNUC__
+//    when testing __STDC_VERSION__ for generic selection support.
+//    On the other hand, Clang also defines __GNUC__, so a clang-specific
+//    check is required to enable the use of generic selection.
+
+// If we don't have __REDIRECT, prototypes will be missing if
+//    __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64].
+
+// Decide whether we can define 'extern inline' functions in headers.
+
+// This is here only because every header file already includes this one.
+//    Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
+//    <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
+//    that will always return failure (and set errno to ENOSYS).
+// This file is automatically generated.
+//    This file selects the right generated file of `__stub_FUNCTION' macros
+//    based on the architecture being compiled for.
+
+// Determine the wordsize from the preprocessor defines.
+//
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This file is automatically generated.
+//    It defines a symbol `__stub_FUNCTION' for each function
+//    in the C library which is a stub, meaning it will fail
+//    every time called, usually setting errno to ENOSYS.
+
+// ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
+//    macro.
+
+// ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
+//    macro.  Most but not all symbols enabled by that macro in TS
+//    18661-1 are enabled unconditionally in C2X; the symbols in Annex F
+//    still require that macro in C2X.
+
+// ISO/IEC TS 18661-4:2015 defines the
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__ macro.  Other than the reduction
+//    functions, the symbols from this TS are enabled unconditionally in
+//    C2X.
+
+// ISO/IEC TS 18661-3:2015 defines the
+//    __STDC_WANT_IEC_60559_TYPES_EXT__ macro.
+
+// Maximum length of any multibyte character in any locale.
+//    We define this value here since the gcc header does not define
+//    the correct value.
+
+// If we are not using GNU CC we have to define all the symbols ourself.
+//    Otherwise use gcc's definitions (see below).
+
+// Get the compiler's limits.h, which defines almost all the ISO constants.
+//
+//     We put this #include_next outside the double inclusion check because
+//     it should be possible to include this file more than once and still get
+//     the definitions from gcc's header.
+
+// The <limits.h> files in some gcc versions don't define LLONG_MIN,
+//    LLONG_MAX, and ULLONG_MAX.  Instead only the values gcc defined for
+//    ages are available.
+
+// The integer width macros are not defined by GCC's <limits.h> before
+//    GCC 7, or if _GNU_SOURCE rather than
+//    __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature.
+
+// POSIX adds things to <limits.h>.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
+//
+//	Never include this file directly; use <limits.h> instead.
+
+// Determine the wordsize from the preprocessor defines.
+//
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are the standard-mandated minimum values.
+
+// Minimum number of operations in one list I/O call.
+
+// Minimal number of outstanding asynchronous I/O operations.
+
+// Maximum length of arguments to `execve', including environment.
+
+// Maximum simultaneous processes per real user ID.
+
+// Minimal number of timer expiration overruns.
+
+// Maximum length of a host name (not including the terminating null)
+//    as returned from the GETHOSTNAME function.
+
+// Maximum link count of a file.
+
+// Maximum length of login name.
+
+// Number of bytes in a terminal canonical input queue.
+
+// Number of bytes for which space will be
+//    available in a terminal input queue.
+
+// Maximum number of message queues open for a process.
+
+// Maximum number of supported message priorities.
+
+// Number of bytes in a filename.
+
+// Number of simultaneous supplementary group IDs per process.
+
+// Number of files one process can have open at once.
+
+// Number of bytes in a pathname.
+
+// Number of bytes than can be written atomically to a pipe.
+
+// The number of repeated occurrences of a BRE permitted by the
+//    REGEXEC and REGCOMP functions when using the interval notation.
+
+// Minimal number of realtime signals reserved for the application.
+
+// Number of semaphores a process can have.
+
+// Maximal value of a semaphore.
+
+// Number of pending realtime signals.
+
+// Largest value of a `ssize_t'.
+
+// Number of streams a process can have open at once.
+
+// The number of bytes in a symbolic link.
+
+// The number of symbolic links that can be traversed in the
+//    resolution of a pathname in the absence of a loop.
+
+// Number of timer for a process.
+
+// Maximum number of characters in a tty name.
+
+// Maximum length of a timezone name (element of `tzname').
+
+// Maximum clock resolution in nanoseconds.
+
+// Get the implementation-specific values for the above.
+// Minimum guaranteed maximum values for system limits.  Linux version.
+//    Copyright (C) 1993-2020 Free Software Foundation, Inc.
+//
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public License as
+//    published by the Free Software Foundation; either version 2.1 of the
+//    License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library.  If not, see
+//    <https://www.gnu.org/licenses/>.
+
+// The kernel header pollutes the namespace with the NR_OPEN symbol
+//    and defines LINK_MAX although filesystems have different maxima.  A
+//    similar thing is true for OPEN_MAX: the limit can be changed at
+//    runtime and therefore the macro must not be defined.  Remove this
+//    after including the header if necessary.
+
+// The kernel sources contain a file with all the needed information.
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+// Have to remove NR_OPEN?
+// Have to remove LINK_MAX?
+// Have to remove OPEN_MAX?
+// Have to remove ARG_MAX?
+
+// The number of data keys per process.
+// This is the value this implementation supports.
+
+// Controlling the iterations of destructors for thread-specific data.
+// Number of iterations this implementation does.
+
+// The number of threads per process.
+// We have no predefined limit on the number of threads.
+
+// Maximum amount by which a process can descrease its asynchronous I/O
+//    priority level.
+
+// Minimum size for a thread.  At least two pages for systems with 64k
+//    pages.
+
+// Maximum number of timer expiration overruns.
+
+// Maximum tty name length.
+
+// Maximum login name length.  This is arbitrary.
+
+// Maximum host name length.
+
+// Maximum message queue priority level.
+
+// Maximum value the semaphore can have.
+
+// ssize_t is not formally required to be the signed type
+//    corresponding to size_t, but it is for all configurations supported
+//    by glibc.
+
+// This value is a guaranteed minimum maximum.
+//    The current maximum can be got from `sysconf'.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Never include this file directly; include <limits.h> instead.
+
+// The maximum `ibase' and `obase' values allowed by the `bc' utility.
+
+// The maximum number of elements allowed in an array by the `bc' utility.
+
+// The maximum `scale' value allowed by the `bc' utility.
+
+// The maximum length of a string constant accepted by the `bc' utility.
+
+// The maximum number of weights that can be assigned to an entry of
+//    the LC_COLLATE `order' keyword in the locale definition file.
+
+// The maximum number of expressions that can be nested
+//    within parentheses by the `expr' utility.
+
+// The maximum length, in bytes, of an input line.
+
+// The maximum number of repeated occurrences of a regular expression
+//    permitted when using the interval notation `\{M,N\}'.
+
+// The maximum number of bytes in a character class name.  We have no
+//    fixed limit, 2048 is a high number.
+
+// These values are implementation-specific,
+//    and may vary within the implementation.
+//    Their precise values can be obtained from sysconf.
+
+// This value is defined like this in regex.h.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ uint8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_linux_s390x.go b/vendor/modernc.org/libc/limits/limits_linux_s390x.go
new file mode 100644
index 00000000..4e0c0045
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_linux_s390x.go
@@ -0,0 +1,939 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_linux_s390x.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	AIO_PRIO_DELTA_MAX                   = 20
+	BC_BASE_MAX                          = 99
+	BC_DIM_MAX                           = 2048
+	BC_SCALE_MAX                         = 99
+	BC_STRING_MAX                        = 1000
+	CHARCLASS_NAME_MAX                   = 2048
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 255
+	CHAR_MIN                             = 0
+	COLL_WEIGHTS_MAX                     = 255
+	DELAYTIMER_MAX                       = 2147483647
+	EXPR_NEST_MAX                        = 32
+	HOST_NAME_MAX                        = 64
+	INT_MAX                              = 2147483647
+	INT_MIN                              = -2147483648
+	LINE_MAX                             = 2048
+	LLONG_MAX                            = 9223372036854775807
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 256
+	LONG_MAX                             = 9223372036854775807
+	LONG_MIN                             = -9223372036854775808
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 16
+	MQ_PRIO_MAX                          = 32768
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 65536
+	PATH_MAX                             = 4096
+	PIPE_BUF                             = 4096
+	PTHREAD_DESTRUCTOR_ITERATIONS        = 4
+	PTHREAD_KEYS_MAX                     = 1024
+	PTHREAD_STACK_MIN                    = 16384
+	RE_DUP_MAX                           = 32767
+	RTSIG_MAX                            = 32
+	SCHAR_MAX                            = 127
+	SCHAR_MIN                            = -128
+	SEM_VALUE_MAX                        = 2147483647
+	SHRT_MAX                             = 32767
+	SHRT_MIN                             = -32768
+	SSIZE_MAX                            = 9223372036854775807
+	TTY_NAME_MAX                         = 32
+	UCHAR_MAX                            = 255
+	UINT_MAX                             = 4294967295
+	ULLONG_MAX                           = 18446744073709551615
+	ULONG_MAX                            = 18446744073709551615
+	USHRT_MAX                            = 65535
+	XATTR_LIST_MAX                       = 65536
+	XATTR_NAME_MAX                       = 255
+	XATTR_SIZE_MAX                       = 65536
+	X_ATFILE_SOURCE                      = 1
+	X_BITS_POSIX1_LIM_H                  = 1
+	X_BITS_POSIX2_LIM_H                  = 1
+	X_DEFAULT_SOURCE                     = 1
+	X_FEATURES_H                         = 1
+	X_FILE_OFFSET_BITS                   = 64
+	X_GCC_LIMITS_H_                      = 0
+	X_LIBC_LIMITS_H_                     = 1
+	X_LIMITS_H___                        = 0
+	X_LINUX_LIMITS_H                     = 0
+	X_LP64                               = 1
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_C_SOURCE                     = 200809
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_RTSIG_MAX                    = 8
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SOURCE                       = 1
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_STDC_PREDEF_H                      = 1
+	X_SYS_CDEFS_H                        = 1
+	Linux                                = 1
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types	<limits.h>
+
+// Handle feature test macros at the start of a header.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This header is internal to glibc and should not be included outside
+//    of glibc headers.  Headers including it must define
+//    __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first.  This header
+//    cannot have multiple include guards because ISO C feature test
+//    macros depend on the definition of the macro when an affected
+//    header is included, not when the first system header is
+//    included.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// These are defined by the user (or the compiler)
+//    to specify the desired environment:
+//
+//    __STRICT_ANSI__	ISO Standard C.
+//    _ISOC99_SOURCE	Extensions to ISO C89 from ISO C99.
+//    _ISOC11_SOURCE	Extensions to ISO C99 from ISO C11.
+//    _ISOC2X_SOURCE	Extensions to ISO C99 from ISO C2X.
+//    __STDC_WANT_LIB_EXT2__
+// 			Extensions to ISO C99 from TR 27431-2:2010.
+//    __STDC_WANT_IEC_60559_BFP_EXT__
+// 			Extensions to ISO C11 from TS 18661-1:2014.
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__
+// 			Extensions to ISO C11 from TS 18661-4:2015.
+//    __STDC_WANT_IEC_60559_TYPES_EXT__
+// 			Extensions to ISO C11 from TS 18661-3:2015.
+//
+//    _POSIX_SOURCE	IEEE Std 1003.1.
+//    _POSIX_C_SOURCE	If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
+// 			if >=199309L, add IEEE Std 1003.1b-1993;
+// 			if >=199506L, add IEEE Std 1003.1c-1995;
+// 			if >=200112L, all of IEEE 1003.1-2004
+// 			if >=200809L, all of IEEE 1003.1-2008
+//    _XOPEN_SOURCE	Includes POSIX and XPG things.  Set to 500 if
+// 			Single Unix conformance is wanted, to 600 for the
+// 			sixth revision, to 700 for the seventh revision.
+//    _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
+//    _LARGEFILE_SOURCE	Some more functions for correct standard I/O.
+//    _LARGEFILE64_SOURCE	Additional functionality from LFS for large files.
+//    _FILE_OFFSET_BITS=N	Select default filesystem interface.
+//    _ATFILE_SOURCE	Additional *at interfaces.
+//    _GNU_SOURCE		All of the above, plus GNU extensions.
+//    _DEFAULT_SOURCE	The default set of features (taking precedence over
+// 			__STRICT_ANSI__).
+//
+//    _FORTIFY_SOURCE	Add security hardening to many library functions.
+// 			Set to 1 or 2; 2 performs stricter checks than 1.
+//
+//    _REENTRANT, _THREAD_SAFE
+// 			Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
+//
+//    The `-ansi' switch to the GNU C compiler, and standards conformance
+//    options such as `-std=c99', define __STRICT_ANSI__.  If none of
+//    these are defined, or if _DEFAULT_SOURCE is defined, the default is
+//    to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
+//    200809L, as well as enabling miscellaneous functions from BSD and
+//    SVID.  If more than one of these are defined, they accumulate.  For
+//    example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
+//    give you ISO C, 1003.1, and 1003.2, but nothing else.
+//
+//    These are defined by this file and are used by the
+//    header files to decide what to declare or define:
+//
+//    __GLIBC_USE (F)	Define things from feature set F.  This is defined
+// 			to 1 or 0; the subsequent macros are either defined
+// 			or undefined, and those tests should be moved to
+// 			__GLIBC_USE.
+//    __USE_ISOC11		Define ISO C11 things.
+//    __USE_ISOC99		Define ISO C99 things.
+//    __USE_ISOC95		Define ISO C90 AMD1 (C95) things.
+//    __USE_ISOCXX11	Define ISO C++11 things.
+//    __USE_POSIX		Define IEEE Std 1003.1 things.
+//    __USE_POSIX2		Define IEEE Std 1003.2 things.
+//    __USE_POSIX199309	Define IEEE Std 1003.1, and .1b things.
+//    __USE_POSIX199506	Define IEEE Std 1003.1, .1b, .1c and .1i things.
+//    __USE_XOPEN		Define XPG things.
+//    __USE_XOPEN_EXTENDED	Define X/Open Unix things.
+//    __USE_UNIX98		Define Single Unix V2 things.
+//    __USE_XOPEN2K        Define XPG6 things.
+//    __USE_XOPEN2KXSI     Define XPG6 XSI things.
+//    __USE_XOPEN2K8       Define XPG7 things.
+//    __USE_XOPEN2K8XSI    Define XPG7 XSI things.
+//    __USE_LARGEFILE	Define correct standard I/O things.
+//    __USE_LARGEFILE64	Define LFS things with separate names.
+//    __USE_FILE_OFFSET64	Define 64bit interface as default.
+//    __USE_MISC		Define things from 4.3BSD or System V Unix.
+//    __USE_ATFILE		Define *at interfaces and AT_* constants for them.
+//    __USE_GNU		Define GNU extensions.
+//    __USE_FORTIFY_LEVEL	Additional security measures used, according to level.
+//
+//    The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
+//    defined by this file unconditionally.  `__GNU_LIBRARY__' is provided
+//    only for compatibility.  All new code should use the other symbols
+//    to test for features.
+//
+//    All macros listed above as possibly being defined by this file are
+//    explicitly undefined if they are not explicitly defined.
+//    Feature-test macros that are not defined by the user or compiler
+//    but are implied by the other feature-test macros defined (or by the
+//    lack of any definitions) are defined by the file.
+//
+//    ISO C feature test macros depend on the definition of the macro
+//    when an affected header is included, not when the first system
+//    header is included, and so they are handled in
+//    <bits/libc-header-start.h>, which does not have a multiple include
+//    guard.  Feature test macros that can be handled from the first
+//    system header included are handled here.
+
+// Undefine everything, so we get a clean slate.
+
+// Suppress kernel-name space pollution unless user expressedly asks
+//    for it.
+
+// Convenience macro to test the version of gcc.
+//    Use like this:
+//    #if __GNUC_PREREQ (2,8)
+//    ... code requiring gcc 2.8 or later ...
+//    #endif
+//    Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
+//    added in 2.0.
+
+// Similarly for clang.  Features added to GCC after version 4.2 may
+//    or may not also be available in clang, and clang's definitions of
+//    __GNUC(_MINOR)__ are fixed at 4 and 2 respectively.  Not all such
+//    features can be queried via __has_extension/__has_feature.
+
+// Whether to use feature set F.
+
+// _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
+//    _DEFAULT_SOURCE.  If _DEFAULT_SOURCE is present we do not
+//    issue a warning; the expectation is that the source is being
+//    transitioned to use the new macro.
+
+// If _GNU_SOURCE was defined by the user, turn on all the other features.
+
+// If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
+//    define _DEFAULT_SOURCE.
+
+// This is to enable the ISO C2X extension.
+
+// This is to enable the ISO C11 extension.
+
+// This is to enable the ISO C99 extension.
+
+// This is to enable the ISO C90 Amendment 1:1995 extension.
+
+// If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
+//    is defined, use POSIX.1-2008 (or another version depending on
+//    _XOPEN_SOURCE).
+
+// Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
+//    defined in all multithreaded code.  GNU libc has not required this
+//    for many years.  We now treat them as compatibility synonyms for
+//    _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
+//    comprehensive support for multithreaded code.  Using them never
+//    lowers the selected level of POSIX conformance, only raises it.
+
+// The function 'gets' existed in C89, but is impossible to use
+//    safely.  It has been removed from ISO C11 and ISO C++14.  Note: for
+//    compatibility with various implementations of <cstdio>, this test
+//    must consider only the value of __cplusplus when compiling C++.
+
+// GNU formerly extended the scanf functions with modified format
+//    specifiers %as, %aS, and %a[...] that allocate a buffer for the
+//    input using malloc.  This extension conflicts with ISO C99, which
+//    defines %a as a standalone format specifier that reads a floating-
+//    point number; moreover, POSIX.1-2008 provides the same feature
+//    using the modifier letter 'm' instead (%ms, %mS, %m[...]).
+//
+//    We now follow C99 unless GNU extensions are active and the compiler
+//    is specifically in C89 or C++98 mode (strict or not).  For
+//    instance, with GCC, -std=gnu11 will have C99-compliant scanf with
+//    or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the
+//    old extension.
+
+// Get definitions of __STDC_* predefined macros, if the compiler has
+//    not preincluded this header automatically.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// This macro indicates that the installed library is the GNU C Library.
+//    For historic reasons the value now is 6 and this will stay from now
+//    on.  The use of this variable is deprecated.  Use __GLIBC__ and
+//    __GLIBC_MINOR__ now (see below) when you want to test for a specific
+//    GNU C library version and use the values in <gnu/lib-names.h> to get
+//    the sonames of the shared libraries.
+
+// Major and minor version number of the GNU C library package.  Use
+//    these macros to test for features in specific releases.
+
+// This is here only because every header file already includes this one.
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// We are almost always included from features.h.
+
+// The GNU libc does not support any K&R compilers or the traditional mode
+//    of ISO C compilers anymore.  Check for some of the combinations not
+//    anymore supported.
+
+// Some user header file might have defined this before.
+
+// All functions, except those with callbacks or those that
+//    synchronize memory, are leaf functions.
+
+// GCC can always grok prototypes.  For C++ programs we add throw()
+//    to help it optimize the function calls.  But this works only with
+//    gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
+//    as non-throwing using a function attribute since programs can use
+//    the -fexceptions options for C code as well.
+
+// Compilers that are not clang may object to
+//        #if defined __clang__ && __has_extension(...)
+//    even though they do not need to evaluate the right-hand side of the &&.
+
+// These two macros are not used in glibc anymore.  They are kept here
+//    only because some other projects expect the macros to be defined.
+
+// For these things, GCC behaves the ANSI way normally,
+//    and the non-ANSI way under -traditional.
+
+// This is not a typedef so `const __ptr_t' does the right thing.
+
+// C++ needs to know that types and declarations are C, not C++.
+
+// Fortify support.
+
+// Support for flexible arrays.
+//    Headers that should use flexible arrays only if they're "real"
+//    (e.g. only if they won't affect sizeof()) should test
+//    #if __glibc_c99_flexarr_available.
+
+// __asm__ ("xyz") is used throughout the headers to rename functions
+//    at the assembly language level.  This is wrapped by the __REDIRECT
+//    macro, in order to support compilers that can do this some other
+//    way.  When compilers don't support asm-names at all, we have to do
+//    preprocessor tricks instead (which don't have exactly the right
+//    semantics, but it's the best we can do).
+//
+//    Example:
+//    int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid);
+
+//
+// #elif __SOME_OTHER_COMPILER__
+//
+// # define __REDIRECT(name, proto, alias) name proto; 	_Pragma("let " #name " = " #alias)
+
+// GCC has various useful declarations that can be made with the
+//    `__attribute__' syntax.  All of the ways we use this do fine if
+//    they are omitted for compilers that don't understand it.
+
+// At some point during the gcc 2.96 development the `malloc' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Tell the compiler which arguments to an allocation function
+//    indicate the size of the allocation.
+
+// At some point during the gcc 2.96 development the `pure' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// This declaration tells the compiler that the value is constant.
+
+// At some point during the gcc 3.1 development the `used' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+
+// Since version 3.2, gcc allows marking deprecated functions.
+
+// Since version 4.5, gcc also allows one to specify the message printed
+//    when a deprecated function is used.  clang claims to be gcc 4.2, but
+//    may also support this feature.
+
+// At some point during the gcc 2.8 development the `format_arg' attribute
+//    for functions was introduced.  We don't want to use it unconditionally
+//    (although this would be possible) since it generates warnings.
+//    If several `format_arg' attributes are given for the same function, in
+//    gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
+//    all designated arguments are considered.
+
+// At some point during the gcc 2.97 development the `strfmon' format
+//    attribute for functions was introduced.  We don't want to use it
+//    unconditionally (although this would be possible) since it
+//    generates warnings.
+
+// The nonull function attribute allows to mark pointer parameters which
+//    must not be NULL.
+
+// If fortification mode, we warn about unused results of certain
+//    function calls which can lead to problems.
+
+// Forces a function to be always inlined.
+// The Linux kernel defines __always_inline in stddef.h (283d7573), and
+//    it conflicts with this definition.  Therefore undefine it first to
+//    allow either header to be included first.
+
+// Associate error messages with the source location of the call site rather
+//    than with the source location inside the function.
+
+// GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+//    inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__
+//    or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions
+//    older than 4.3 may define these macros and still not guarantee GNU inlining
+//    semantics.
+//
+//    clang++ identifies itself as gcc-4.2, but has support for GNU inlining
+//    semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and
+//    __GNUC_GNU_INLINE__ macro definitions.
+
+// GCC 4.3 and above allow passing all anonymous arguments of an
+//    __extern_always_inline function to some other vararg function.
+
+// It is possible to compile containing GCC extensions even if GCC is
+//    run in pedantic mode if the uses are carefully marked using the
+//    `__extension__' keyword.  But this is not generally available before
+//    version 2.8.
+
+// __restrict is known in EGCS 1.2 and above.
+
+// ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
+//      array_name[restrict]
+//    GCC 3.1 supports this.
+
+// Describes a char array whose address can safely be passed as the first
+//    argument to strncpy and strncat, as the char array is not necessarily
+//    a NUL-terminated string.
+
+// Undefine (also defined in libc-symbols.h).
+// Copies attributes from the declaration or type referenced by
+//    the argument.
+
+// Determine the wordsize from the preprocessor defines.
+
+// Properties of long double type.  ldbl-opt version.
+//    Copyright (C) 2016-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License  published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is
+//    intended for use in preprocessor macros.
+//
+//    Note: MESSAGE must be a _single_ string; concatenation of string
+//    literals is not supported.
+
+// Generic selection (ISO C11) is a C-only feature, available in GCC
+//    since version 4.9.  Previous versions do not provide generic
+//    selection, even though they might set __STDC_VERSION__ to 201112L,
+//    when in -std=c11 mode.  Thus, we must check for !defined __GNUC__
+//    when testing __STDC_VERSION__ for generic selection support.
+//    On the other hand, Clang also defines __GNUC__, so a clang-specific
+//    check is required to enable the use of generic selection.
+
+// If we don't have __REDIRECT, prototypes will be missing if
+//    __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64].
+
+// Decide whether we can define 'extern inline' functions in headers.
+
+// This is here only because every header file already includes this one.
+//    Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
+//    <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
+//    that will always return failure (and set errno to ENOSYS).
+// This file is automatically generated.
+//    This file selects the right generated file of `__stub_FUNCTION' macros
+//    based on the architecture being compiled for.
+
+// Determine the wordsize from the preprocessor defines.
+
+// This file is automatically generated.
+//    It defines a symbol `__stub_FUNCTION' for each function
+//    in the C library which is a stub, meaning it will fail
+//    every time called, usually setting errno to ENOSYS.
+
+// ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
+//    macro.
+
+// ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
+//    macro.  Most but not all symbols enabled by that macro in TS
+//    18661-1 are enabled unconditionally in C2X; the symbols in Annex F
+//    still require that macro in C2X.
+
+// ISO/IEC TS 18661-4:2015 defines the
+//    __STDC_WANT_IEC_60559_FUNCS_EXT__ macro.  Other than the reduction
+//    functions, the symbols from this TS are enabled unconditionally in
+//    C2X.
+
+// ISO/IEC TS 18661-3:2015 defines the
+//    __STDC_WANT_IEC_60559_TYPES_EXT__ macro.
+
+// Maximum length of any multibyte character in any locale.
+//    We define this value here since the gcc header does not define
+//    the correct value.
+
+// If we are not using GNU CC we have to define all the symbols ourself.
+//    Otherwise use gcc's definitions (see below).
+
+// Get the compiler's limits.h, which defines almost all the ISO constants.
+//
+//     We put this #include_next outside the double inclusion check because
+//     it should be possible to include this file more than once and still get
+//     the definitions from gcc's header.
+
+// The <limits.h> files in some gcc versions don't define LLONG_MIN,
+//    LLONG_MAX, and ULLONG_MAX.  Instead only the values gcc defined for
+//    ages are available.
+
+// The integer width macros are not defined by GCC's <limits.h> before
+//    GCC 7, or if _GNU_SOURCE rather than
+//    __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature.
+
+// POSIX adds things to <limits.h>.
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+//	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
+//
+//	Never include this file directly; use <limits.h> instead.
+
+// Determine the wordsize from the preprocessor defines.
+
+// These are the standard-mandated minimum values.
+
+// Minimum number of operations in one list I/O call.
+
+// Minimal number of outstanding asynchronous I/O operations.
+
+// Maximum length of arguments to `execve', including environment.
+
+// Maximum simultaneous processes per real user ID.
+
+// Minimal number of timer expiration overruns.
+
+// Maximum length of a host name (not including the terminating null)
+//    as returned from the GETHOSTNAME function.
+
+// Maximum link count of a file.
+
+// Maximum length of login name.
+
+// Number of bytes in a terminal canonical input queue.
+
+// Number of bytes for which space will be
+//    available in a terminal input queue.
+
+// Maximum number of message queues open for a process.
+
+// Maximum number of supported message priorities.
+
+// Number of bytes in a filename.
+
+// Number of simultaneous supplementary group IDs per process.
+
+// Number of files one process can have open at once.
+
+// Number of bytes in a pathname.
+
+// Number of bytes than can be written atomically to a pipe.
+
+// The number of repeated occurrences of a BRE permitted by the
+//    REGEXEC and REGCOMP functions when using the interval notation.
+
+// Minimal number of realtime signals reserved for the application.
+
+// Number of semaphores a process can have.
+
+// Maximal value of a semaphore.
+
+// Number of pending realtime signals.
+
+// Largest value of a `ssize_t'.
+
+// Number of streams a process can have open at once.
+
+// The number of bytes in a symbolic link.
+
+// The number of symbolic links that can be traversed in the
+//    resolution of a pathname in the absence of a loop.
+
+// Number of timer for a process.
+
+// Maximum number of characters in a tty name.
+
+// Maximum length of a timezone name (element of `tzname').
+
+// Maximum clock resolution in nanoseconds.
+
+// Get the implementation-specific values for the above.
+// Minimum guaranteed maximum values for system limits.  Linux version.
+//    Copyright (C) 1993-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public License as
+//    published by the Free Software Foundation; either version 2.1 of the
+//    License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; see the file COPYING.LIB.  If
+//    not, see <https://www.gnu.org/licenses/>.
+
+// The kernel header pollutes the namespace with the NR_OPEN symbol
+//    and defines LINK_MAX although filesystems have different maxima.  A
+//    similar thing is true for OPEN_MAX: the limit can be changed at
+//    runtime and therefore the macro must not be defined.  Remove this
+//    after including the header if necessary.
+
+// The kernel sources contain a file with all the needed information.
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+// Have to remove NR_OPEN?
+// Have to remove LINK_MAX?
+// Have to remove OPEN_MAX?
+// Have to remove ARG_MAX?
+
+// The number of data keys per process.
+// This is the value this implementation supports.
+
+// Controlling the iterations of destructors for thread-specific data.
+// Number of iterations this implementation does.
+
+// The number of threads per process.
+// We have no predefined limit on the number of threads.
+
+// Maximum amount by which a process can descrease its asynchronous I/O
+//    priority level.
+
+// Minimum size for a thread.  We are free to choose a reasonable value.
+
+// Maximum number of timer expiration overruns.
+
+// Maximum tty name length.
+
+// Maximum login name length.  This is arbitrary.
+
+// Maximum host name length.
+
+// Maximum message queue priority level.
+
+// Maximum value the semaphore can have.
+
+// ssize_t is not formally required to be the signed type
+//    corresponding to size_t, but it is for all configurations supported
+//    by glibc.
+
+// This value is a guaranteed minimum maximum.
+//    The current maximum can be got from `sysconf'.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//    This file is part of the GNU C Library.
+//
+//    The GNU C Library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    The GNU C Library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with the GNU C Library; if not, see
+//    <https://www.gnu.org/licenses/>.
+
+// Never include this file directly; include <limits.h> instead.
+
+// The maximum `ibase' and `obase' values allowed by the `bc' utility.
+
+// The maximum number of elements allowed in an array by the `bc' utility.
+
+// The maximum `scale' value allowed by the `bc' utility.
+
+// The maximum length of a string constant accepted by the `bc' utility.
+
+// The maximum number of weights that can be assigned to an entry of
+//    the LC_COLLATE `order' keyword in the locale definition file.
+
+// The maximum number of expressions that can be nested
+//    within parentheses by the `expr' utility.
+
+// The maximum length, in bytes, of an input line.
+
+// The maximum number of repeated occurrences of a regular expression
+//    permitted when using the interval notation `\{M,N\}'.
+
+// The maximum number of bytes in a character class name.  We have no
+//    fixed limit, 2048 is a high number.
+
+// These values are implementation-specific,
+//    and may vary within the implementation.
+//    Their precise values can be obtained from sysconf.
+
+// This value is defined like this in regex.h.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ uint8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_netbsd_amd64.go b/vendor/modernc.org/libc/limits/limits_netbsd_amd64.go
new file mode 100644
index 00000000..7166a522
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_netbsd_amd64.go
@@ -0,0 +1,460 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_netbsd_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	ARG_MAX                              = 262144
+	BC_BASE_MAX                          = 2147483647
+	BC_DIM_MAX                           = 65535
+	BC_SCALE_MAX                         = 2147483647
+	BC_STRING_MAX                        = 2147483647
+	CHARCLASS_NAME_MAX                   = 14
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 127
+	CHAR_MIN                             = -128
+	CHILD_MAX                            = 160
+	COLL_WEIGHTS_MAX                     = 2
+	DBL_DIG                              = 15
+	EXPR_NEST_MAX                        = 32
+	FLT_DIG                              = 6
+	GID_MAX                              = 2147483647
+	INT_MAX                              = 0x7fffffff
+	INT_MIN                              = -2147483648
+	IOV_MAX                              = 1024
+	LINE_MAX                             = 2048
+	LINK_MAX                             = 32767
+	LLONG_MAX                            = 0x7fffffffffffffff
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 17
+	LONG_BIT                             = 64
+	LONG_MAX                             = 0x7fffffffffffffff
+	LONG_MIN                             = -9223372036854775808
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 32
+	NAME_MAX                             = 511
+	NGROUPS_MAX                          = 16
+	NL_ARGMAX                            = 9
+	NL_LANGMAX                           = 14
+	NL_MSGMAX                            = 32767
+	NL_NMAX                              = 1
+	NL_SETMAX                            = 255
+	NL_TEXTMAX                           = 2048
+	NZERO                                = 20
+	OPEN_MAX                             = 128
+	PASS_MAX                             = 128
+	PATH_MAX                             = 1024
+	PIPE_BUF                             = 512
+	PTHREAD_DESTRUCTOR_ITERATIONS        = 4
+	PTHREAD_KEYS_MAX                     = 256
+	PTHREAD_THREADS_MAX                  = 64
+	QUAD_MAX                             = 0x7fffffffffffffff
+	QUAD_MIN                             = -9223372036854775808
+	RE_DUP_MAX                           = 255
+	SCHAR_MAX                            = 0x7f
+	SCHAR_MIN                            = -128
+	SHRT_MAX                             = 0x7fff
+	SHRT_MIN                             = -32768
+	SIZE_T_MAX                           = 18446744073709551615
+	SSIZE_MAX                            = 9223372036854775807
+	SSIZE_MIN                            = -9223372036854775808
+	TMP_MAX                              = 308915776
+	UCHAR_MAX                            = 0xff
+	UID_MAX                              = 2147483647
+	UINT_MAX                             = 0xffffffff
+	ULLONG_MAX                           = 0xffffffffffffffff
+	ULONG_MAX                            = 0xffffffffffffffff
+	UQUAD_MAX                            = 0xffffffffffffffff
+	USHRT_MAX                            = 0xffff
+	WORD_BIT                             = 32
+	X_FILE_OFFSET_BITS                   = 64
+	X_GETGR_R_SIZE_MAX                   = 1024
+	X_GETPW_R_SIZE_MAX                   = 1024
+	X_LIMITS_H_                          = 0
+	X_LP64                               = 1
+	X_NETBSD_SOURCE                      = 1
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_AIO_LISTIO_MAX               = 2
+	X_POSIX_AIO_MAX                      = 1
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_DELAYTIMER_MAX               = 32
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_MQ_OPEN_MAX                  = 8
+	X_POSIX_MQ_PRIO_MAX                  = 32
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_REALTIME_SIGNALS             = 200112
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SIGQUEUE_MAX                 = 32
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 64
+	X_POSIX_TIMER_MAX                    = 32
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_SYS_SYSLIMITS_H_                   = 0
+	X_X86_64_LIMITS_H_                   = 0
+	X_XOPEN_IOV_MAX                      = 16
+	X_XOPEN_NAME_MAX                     = 256
+	X_XOPEN_PATH_MAX                     = 1024
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+//	$NetBSD: limits.h,v 1.40 2016/08/04 06:43:43 christos Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	8.2 (Berkeley) 1/4/94
+
+//	$NetBSD: featuretest.h,v 1.10 2013/04/26 18:29:06 christos Exp $
+
+// Written by Klaus Klein <kleink@NetBSD.org>, February 2, 1998.
+// Public domain.
+//
+// NOTE: Do not protect this header against multiple inclusion.  Doing
+// so can have subtle side-effects due to header file inclusion order
+// and testing of e.g. _POSIX_SOURCE vs. _POSIX_C_SOURCE.  Instead,
+// protect each CPP macro that we want to supply.
+
+// Feature-test macros are defined by several standards, and allow an
+// application to specify what symbols they want the system headers to
+// expose, and hence what standard they want them to conform to.
+// There are two classes of feature-test macros.  The first class
+// specify complete standards, and if one of these is defined, header
+// files will try to conform to the relevant standard.  They are:
+//
+// ANSI macros:
+// _ANSI_SOURCE			ANSI C89
+//
+// POSIX macros:
+// _POSIX_SOURCE == 1		IEEE Std 1003.1 (version?)
+// _POSIX_C_SOURCE == 1		IEEE Std 1003.1-1990
+// _POSIX_C_SOURCE == 2		IEEE Std 1003.2-1992
+// _POSIX_C_SOURCE == 199309L	IEEE Std 1003.1b-1993
+// _POSIX_C_SOURCE == 199506L	ISO/IEC 9945-1:1996
+// _POSIX_C_SOURCE == 200112L	IEEE Std 1003.1-2001
+// _POSIX_C_SOURCE == 200809L   IEEE Std 1003.1-2008
+//
+// X/Open macros:
+// _XOPEN_SOURCE		System Interfaces and Headers, Issue 4, Ver 2
+// _XOPEN_SOURCE_EXTENDED == 1	XSH4.2 UNIX extensions
+// _XOPEN_SOURCE == 500		System Interfaces and Headers, Issue 5
+// _XOPEN_SOURCE == 520		Networking Services (XNS), Issue 5.2
+// _XOPEN_SOURCE == 600		IEEE Std 1003.1-2001, XSI option
+// _XOPEN_SOURCE == 700		IEEE Std 1003.1-2008, XSI option
+//
+// NetBSD macros:
+// _NETBSD_SOURCE == 1		Make all NetBSD features available.
+//
+// If more than one of these "major" feature-test macros is defined,
+// then the set of facilities provided (and namespace used) is the
+// union of that specified by the relevant standards, and in case of
+// conflict, the earlier standard in the above list has precedence (so
+// if both _POSIX_C_SOURCE and _NETBSD_SOURCE are defined, the version
+// of rename() that's used is the POSIX one).  If none of the "major"
+// feature-test macros is defined, _NETBSD_SOURCE is assumed.
+//
+// There are also "minor" feature-test macros, which enable extra
+// functionality in addition to some base standard.  They should be
+// defined along with one of the "major" macros.  The "minor" macros
+// are:
+//
+// _REENTRANT
+// _ISOC99_SOURCE
+// _ISOC11_SOURCE
+// _LARGEFILE_SOURCE		Large File Support
+//		<http://ftp.sas.com/standards/large.file/x_open.20Mar96.html>
+
+// We have not implemented these yet
+//
+// _POSIX_THREAD_ATTR_STACKADDR
+// _POSIX_THREAD_ATTR_STACKSIZE
+// _POSIX_THREAD_CPUTIME
+// _POSIX_THREAD_PRIORITY_SCHEDULING
+// _POSIX_THREAD_PRIO_INHERIT
+// _POSIX_THREAD_PRIO_PROTECT
+// _POSIX_THREAD_PROCESS_SHARED
+// _POSIX_THREAD_SAFE_FUNCTIONS
+// _POSIX_THREAD_SPORADIC_SERVER
+
+// The following 3 are defined in
+// Open Group Base Specifications Issue 7
+
+// These are the correct names, defined in terms of the above
+// except for PTHREAD_KEYS_MAX which is bigger than standard
+// mandated minimum value _POSIX_THREAD_KEYS_MAX.
+// Not yet: PTHREAD_STACK_MIN
+
+// X/Open CAE Specifications,
+// adopted in IEEE Std 1003.1-2001 XSI.
+
+// IEEE Std 1003.1-2001 TSF
+
+// Always ensure that this is consistent with <stdio.h>
+
+// X/Open Extended API set 2 (a.k.a. C063)
+// This hides unimplemented functions from GNU configure until
+// we are done implementing them.
+
+//	$NetBSD: limits.h,v 1.15 2019/01/21 20:22:48 dholland Exp $
+
+// Copyright (c) 1988 The Regents of the University of California.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	7.2 (Berkeley) 6/28/90
+
+//	$NetBSD: featuretest.h,v 1.10 2013/04/26 18:29:06 christos Exp $
+
+// Written by Klaus Klein <kleink@NetBSD.org>, February 2, 1998.
+// Public domain.
+//
+// NOTE: Do not protect this header against multiple inclusion.  Doing
+// so can have subtle side-effects due to header file inclusion order
+// and testing of e.g. _POSIX_SOURCE vs. _POSIX_C_SOURCE.  Instead,
+// protect each CPP macro that we want to supply.
+
+// Feature-test macros are defined by several standards, and allow an
+// application to specify what symbols they want the system headers to
+// expose, and hence what standard they want them to conform to.
+// There are two classes of feature-test macros.  The first class
+// specify complete standards, and if one of these is defined, header
+// files will try to conform to the relevant standard.  They are:
+//
+// ANSI macros:
+// _ANSI_SOURCE			ANSI C89
+//
+// POSIX macros:
+// _POSIX_SOURCE == 1		IEEE Std 1003.1 (version?)
+// _POSIX_C_SOURCE == 1		IEEE Std 1003.1-1990
+// _POSIX_C_SOURCE == 2		IEEE Std 1003.2-1992
+// _POSIX_C_SOURCE == 199309L	IEEE Std 1003.1b-1993
+// _POSIX_C_SOURCE == 199506L	ISO/IEC 9945-1:1996
+// _POSIX_C_SOURCE == 200112L	IEEE Std 1003.1-2001
+// _POSIX_C_SOURCE == 200809L   IEEE Std 1003.1-2008
+//
+// X/Open macros:
+// _XOPEN_SOURCE		System Interfaces and Headers, Issue 4, Ver 2
+// _XOPEN_SOURCE_EXTENDED == 1	XSH4.2 UNIX extensions
+// _XOPEN_SOURCE == 500		System Interfaces and Headers, Issue 5
+// _XOPEN_SOURCE == 520		Networking Services (XNS), Issue 5.2
+// _XOPEN_SOURCE == 600		IEEE Std 1003.1-2001, XSI option
+// _XOPEN_SOURCE == 700		IEEE Std 1003.1-2008, XSI option
+//
+// NetBSD macros:
+// _NETBSD_SOURCE == 1		Make all NetBSD features available.
+//
+// If more than one of these "major" feature-test macros is defined,
+// then the set of facilities provided (and namespace used) is the
+// union of that specified by the relevant standards, and in case of
+// conflict, the earlier standard in the above list has precedence (so
+// if both _POSIX_C_SOURCE and _NETBSD_SOURCE are defined, the version
+// of rename() that's used is the POSIX one).  If none of the "major"
+// feature-test macros is defined, _NETBSD_SOURCE is assumed.
+//
+// There are also "minor" feature-test macros, which enable extra
+// functionality in addition to some base standard.  They should be
+// defined along with one of the "major" macros.  The "minor" macros
+// are:
+//
+// _REENTRANT
+// _ISOC99_SOURCE
+// _ISOC11_SOURCE
+// _LARGEFILE_SOURCE		Large File Support
+//		<http://ftp.sas.com/standards/large.file/x_open.20Mar96.html>
+
+//	$NetBSD: syslimits.h,v 1.28 2015/08/21 07:19:39 uebayasi Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
+
+//	$NetBSD: featuretest.h,v 1.10 2013/04/26 18:29:06 christos Exp $
+
+// Written by Klaus Klein <kleink@NetBSD.org>, February 2, 1998.
+// Public domain.
+//
+// NOTE: Do not protect this header against multiple inclusion.  Doing
+// so can have subtle side-effects due to header file inclusion order
+// and testing of e.g. _POSIX_SOURCE vs. _POSIX_C_SOURCE.  Instead,
+// protect each CPP macro that we want to supply.
+
+// Feature-test macros are defined by several standards, and allow an
+// application to specify what symbols they want the system headers to
+// expose, and hence what standard they want them to conform to.
+// There are two classes of feature-test macros.  The first class
+// specify complete standards, and if one of these is defined, header
+// files will try to conform to the relevant standard.  They are:
+//
+// ANSI macros:
+// _ANSI_SOURCE			ANSI C89
+//
+// POSIX macros:
+// _POSIX_SOURCE == 1		IEEE Std 1003.1 (version?)
+// _POSIX_C_SOURCE == 1		IEEE Std 1003.1-1990
+// _POSIX_C_SOURCE == 2		IEEE Std 1003.2-1992
+// _POSIX_C_SOURCE == 199309L	IEEE Std 1003.1b-1993
+// _POSIX_C_SOURCE == 199506L	ISO/IEC 9945-1:1996
+// _POSIX_C_SOURCE == 200112L	IEEE Std 1003.1-2001
+// _POSIX_C_SOURCE == 200809L   IEEE Std 1003.1-2008
+//
+// X/Open macros:
+// _XOPEN_SOURCE		System Interfaces and Headers, Issue 4, Ver 2
+// _XOPEN_SOURCE_EXTENDED == 1	XSH4.2 UNIX extensions
+// _XOPEN_SOURCE == 500		System Interfaces and Headers, Issue 5
+// _XOPEN_SOURCE == 520		Networking Services (XNS), Issue 5.2
+// _XOPEN_SOURCE == 600		IEEE Std 1003.1-2001, XSI option
+// _XOPEN_SOURCE == 700		IEEE Std 1003.1-2008, XSI option
+//
+// NetBSD macros:
+// _NETBSD_SOURCE == 1		Make all NetBSD features available.
+//
+// If more than one of these "major" feature-test macros is defined,
+// then the set of facilities provided (and namespace used) is the
+// union of that specified by the relevant standards, and in case of
+// conflict, the earlier standard in the above list has precedence (so
+// if both _POSIX_C_SOURCE and _NETBSD_SOURCE are defined, the version
+// of rename() that's used is the POSIX one).  If none of the "major"
+// feature-test macros is defined, _NETBSD_SOURCE is assumed.
+//
+// There are also "minor" feature-test macros, which enable extra
+// functionality in addition to some base standard.  They should be
+// defined along with one of the "major" macros.  The "minor" macros
+// are:
+//
+// _REENTRANT
+// _ISOC99_SOURCE
+// _ISOC11_SOURCE
+// _LARGEFILE_SOURCE		Large File Support
+//		<http://ftp.sas.com/standards/large.file/x_open.20Mar96.html>
+
+// kept in sync with MAXNAMLEN
+
+// IEEE Std 1003.1c-95, adopted in X/Open CAE Specification Issue 5 Version 2
+
+// X/Open CAE Specification Issue 5 Version 2
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_openbsd_amd64.go b/vendor/modernc.org/libc/limits/limits_openbsd_amd64.go
new file mode 100644
index 00000000..f98757d4
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_openbsd_amd64.go
@@ -0,0 +1,540 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_openbsd_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	ARG_MAX                              = 524288
+	BC_BASE_MAX                          = 2147483647
+	BC_DIM_MAX                           = 65535
+	BC_SCALE_MAX                         = 2147483647
+	BC_STRING_MAX                        = 2147483647
+	CHAR_BIT                             = 8
+	CHAR_MAX                             = 0x7f
+	CHAR_MIN                             = -128
+	CHILD_MAX                            = 80
+	COLL_WEIGHTS_MAX                     = 2
+	EXPR_NEST_MAX                        = 32
+	GID_MAX                              = 4294967295
+	HOST_NAME_MAX                        = 255
+	INT_MAX                              = 0x7fffffff
+	INT_MIN                              = -2147483648
+	IOV_MAX                              = 1024
+	LINE_MAX                             = 2048
+	LINK_MAX                             = 32767
+	LLONG_MAX                            = 0x7fffffffffffffff
+	LLONG_MIN                            = -9223372036854775808
+	LOGIN_NAME_MAX                       = 32
+	LONG_BIT                             = 64
+	LONG_MAX                             = 0x7fffffffffffffff
+	LONG_MIN                             = -9223372036854775808
+	MAX_CANON                            = 255
+	MAX_INPUT                            = 255
+	MB_LEN_MAX                           = 4
+	NAME_MAX                             = 255
+	NGROUPS_MAX                          = 16
+	NL_ARGMAX                            = 9
+	NL_LANGMAX                           = 14
+	NL_MSGMAX                            = 32767
+	NL_SETMAX                            = 255
+	NL_TEXTMAX                           = 255
+	NZERO                                = 20
+	OPEN_MAX                             = 64
+	PATH_MAX                             = 1024
+	PIPE_BUF                             = 512
+	QUAD_MAX                             = 0x7fffffffffffffff
+	QUAD_MIN                             = -9223372036854775808
+	RE_DUP_MAX                           = 255
+	SCHAR_MAX                            = 0x7f
+	SCHAR_MIN                            = -128
+	SEM_VALUE_MAX                        = 4294967295
+	SHRT_MAX                             = 0x7fff
+	SHRT_MIN                             = -32768
+	SIZE_T_MAX                           = 18446744073709551615
+	SSIZE_MAX                            = 9223372036854775807
+	SYMLINK_MAX                          = 1024
+	SYMLOOP_MAX                          = 32
+	TTY_NAME_MAX                         = 260
+	UCHAR_MAX                            = 0xff
+	UID_MAX                              = 4294967295
+	UINT_MAX                             = 0xffffffff
+	ULLONG_MAX                           = 0xffffffffffffffff
+	ULONG_MAX                            = 0xffffffffffffffff
+	UQUAD_MAX                            = 0xffffffffffffffff
+	USHRT_MAX                            = 0xffff
+	WORD_BIT                             = 32
+	X_FILE_OFFSET_BITS                   = 64
+	X_LIMITS_H_                          = 0
+	X_LP64                               = 1
+	X_MACHINE_CDEFS_H_                   = 0
+	X_MACHINE_LIMITS_H_                  = 0
+	X_POSIX2_BC_BASE_MAX                 = 99
+	X_POSIX2_BC_DIM_MAX                  = 2048
+	X_POSIX2_BC_SCALE_MAX                = 99
+	X_POSIX2_BC_STRING_MAX               = 1000
+	X_POSIX2_CHARCLASS_NAME_MAX          = 14
+	X_POSIX2_COLL_WEIGHTS_MAX            = 2
+	X_POSIX2_EXPR_NEST_MAX               = 32
+	X_POSIX2_LINE_MAX                    = 2048
+	X_POSIX2_RE_DUP_MAX                  = 255
+	X_POSIX_ARG_MAX                      = 4096
+	X_POSIX_CHILD_MAX                    = 25
+	X_POSIX_CLOCKRES_MIN                 = 20000000
+	X_POSIX_HOST_NAME_MAX                = 255
+	X_POSIX_LINK_MAX                     = 8
+	X_POSIX_LOGIN_NAME_MAX               = 9
+	X_POSIX_MAX_CANON                    = 255
+	X_POSIX_MAX_INPUT                    = 255
+	X_POSIX_NAME_MAX                     = 14
+	X_POSIX_NGROUPS_MAX                  = 8
+	X_POSIX_OPEN_MAX                     = 20
+	X_POSIX_PATH_MAX                     = 256
+	X_POSIX_PIPE_BUF                     = 512
+	X_POSIX_RE_DUP_MAX                   = 255
+	X_POSIX_SEM_NSEMS_MAX                = 256
+	X_POSIX_SEM_VALUE_MAX                = 32767
+	X_POSIX_SSIZE_MAX                    = 32767
+	X_POSIX_STREAM_MAX                   = 8
+	X_POSIX_SYMLINK_MAX                  = 255
+	X_POSIX_SYMLOOP_MAX                  = 8
+	X_POSIX_THREAD_DESTRUCTOR_ITERATIONS = 4
+	X_POSIX_THREAD_KEYS_MAX              = 128
+	X_POSIX_THREAD_THREADS_MAX           = 4
+	X_POSIX_TTY_NAME_MAX                 = 9
+	X_POSIX_TZNAME_MAX                   = 6
+	X_RET_PROTECTOR                      = 1
+	X_SYS_CDEFS_H_                       = 0
+	X_SYS_LIMITS_H_                      = 0
+	X_XOPEN_IOV_MAX                      = 16
+	X_XOPEN_NAME_MAX                     = 255
+	X_XOPEN_PATH_MAX                     = 1024
+	Unix                                 = 1
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = int32 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+//	$OpenBSD: limits.h,v 1.19 2015/01/20 22:09:50 tedu Exp $
+//	$NetBSD: limits.h,v 1.7 1994/10/26 00:56:00 cgd Exp $
+
+// Copyright (c) 1988 The Regents of the University of California.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	5.9 (Berkeley) 4/3/91
+
+//	$OpenBSD: cdefs.h,v 1.43 2018/10/29 17:10:40 guenther Exp $
+//	$NetBSD: cdefs.h,v 1.16 1996/04/03 20:46:39 christos Exp $
+
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.7 (Berkeley) 1/21/94
+
+//	$OpenBSD: cdefs.h,v 1.3 2013/03/28 17:30:45 martynas Exp $
+
+// Written by J.T. Conklin <jtc@wimsey.com> 01/17/95.
+// Public domain.
+
+// Macro to test if we're using a specific version of gcc or later.
+
+// The __CONCAT macro is used to concatenate parts of symbol names, e.g.
+// with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
+// The __CONCAT macro is a bit tricky -- make sure you don't put spaces
+// in between its arguments.  Do not use __CONCAT on double-quoted strings,
+// such as those from the __STRING macro: to concatenate strings just put
+// them next to each other.
+
+// GCC1 and some versions of GCC2 declare dead (non-returning) and
+// pure (no side effects) functions using "volatile" and "const";
+// unfortunately, these then cause warnings under "-ansi -pedantic".
+// GCC >= 2.5 uses the __attribute__((attrs)) style.  All of these
+// work for GNU C++ (modulo a slight glitch in the C++ grammar in
+// the distribution version of 2.5.5).
+
+// __returns_twice makes the compiler not assume the function
+// only returns once.  This affects registerisation of variables:
+// even local variables need to be in memory across such a call.
+// Example: setjmp()
+
+// __only_inline makes the compiler only use this function definition
+// for inlining; references that can't be inlined will be left as
+// external references instead of generating a local copy.  The
+// matching library should include a simple extern definition for
+// the function to handle those references.  c.f. ctype.h
+
+// GNU C version 2.96 adds explicit branch prediction so that
+// the CPU back-end can hint the processor and also so that
+// code blocks can be reordered such that the predicted path
+// sees a more linear flow, thus improving cache behavior, etc.
+//
+// The following two macros provide us with a way to utilize this
+// compiler feature.  Use __predict_true() if you expect the expression
+// to evaluate to true, and __predict_false() if you expect the
+// expression to evaluate to false.
+//
+// A few notes about usage:
+//
+//	* Generally, __predict_false() error condition checks (unless
+//	  you have some _strong_ reason to do otherwise, in which case
+//	  document it), and/or __predict_true() `no-error' condition
+//	  checks, assuming you want to optimize for the no-error case.
+//
+//	* Other than that, if you don't know the likelihood of a test
+//	  succeeding from empirical or other `hard' evidence, don't
+//	  make predictions.
+//
+//	* These are meant to be used in places that are run `a lot'.
+//	  It is wasteful to make predictions in code that is run
+//	  seldomly (e.g. at subsystem initialization time) as the
+//	  basic block reordering that this affects can often generate
+//	  larger code.
+
+// Delete pseudo-keywords wherever they are not available or needed.
+
+// The __packed macro indicates that a variable or structure members
+// should have the smallest possible alignment, despite any host CPU
+// alignment requirements.
+//
+// The __aligned(x) macro specifies the minimum alignment of a
+// variable or structure.
+//
+// These macros together are useful for describing the layout and
+// alignment of messages exchanged with hardware or other systems.
+
+// "The nice thing about standards is that there are so many to choose from."
+// There are a number of "feature test macros" specified by (different)
+// standards that determine which interfaces and types the header files
+// should expose.
+//
+// Because of inconsistencies in these macros, we define our own
+// set in the private name space that end in _VISIBLE.  These are
+// always defined and so headers can test their values easily.
+// Things can get tricky when multiple feature macros are defined.
+// We try to take the union of all the features requested.
+//
+// The following macros are guaranteed to have a value after cdefs.h
+// has been included:
+//	__POSIX_VISIBLE
+//	__XPG_VISIBLE
+//	__ISO_C_VISIBLE
+//	__BSD_VISIBLE
+
+// X/Open Portability Guides and Single Unix Specifications.
+// _XOPEN_SOURCE				XPG3
+// _XOPEN_SOURCE && _XOPEN_VERSION = 4		XPG4
+// _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED = 1	XPG4v2
+// _XOPEN_SOURCE == 500				XPG5
+// _XOPEN_SOURCE == 520				XPG5v2
+// _XOPEN_SOURCE == 600				POSIX 1003.1-2001 with XSI
+// _XOPEN_SOURCE == 700				POSIX 1003.1-2008 with XSI
+//
+// The XPG spec implies a specific value for _POSIX_C_SOURCE.
+
+// POSIX macros, these checks must follow the XOPEN ones above.
+//
+// _POSIX_SOURCE == 1		1003.1-1988 (superseded by _POSIX_C_SOURCE)
+// _POSIX_C_SOURCE == 1		1003.1-1990
+// _POSIX_C_SOURCE == 2		1003.2-1992
+// _POSIX_C_SOURCE == 199309L	1003.1b-1993
+// _POSIX_C_SOURCE == 199506L   1003.1c-1995, 1003.1i-1995,
+//				and the omnibus ISO/IEC 9945-1:1996
+// _POSIX_C_SOURCE == 200112L   1003.1-2001
+// _POSIX_C_SOURCE == 200809L   1003.1-2008
+//
+// The POSIX spec implies a specific value for __ISO_C_VISIBLE, though
+// this may be overridden by the _ISOC99_SOURCE macro later.
+
+// _ANSI_SOURCE means to expose ANSI C89 interfaces only.
+// If the user defines it in addition to one of the POSIX or XOPEN
+// macros, assume the POSIX/XOPEN macro(s) should take precedence.
+
+// _ISOC99_SOURCE, _ISOC11_SOURCE, __STDC_VERSION__, and __cplusplus
+// override any of the other macros since they are non-exclusive.
+
+// Finally deal with BSD-specific interfaces that are not covered
+// by any standards.  We expose these when none of the POSIX or XPG
+// macros is defined or if the user explicitly asks for them.
+
+// Default values.
+
+// $OpenBSD: limits.h,v 1.10 2012/06/30 20:21:10 guenther Exp $
+// Copyright (c) 2002 Marc Espie.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
+// ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OPENBSD
+// PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//	$OpenBSD: cdefs.h,v 1.43 2018/10/29 17:10:40 guenther Exp $
+//	$NetBSD: cdefs.h,v 1.16 1996/04/03 20:46:39 christos Exp $
+
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.7 (Berkeley) 1/21/94
+
+// Common definitions for limits.h.
+
+// Legacy
+//	$OpenBSD: limits.h,v 1.6 2015/04/30 13:42:08 millert Exp $
+
+// Copyright (c) 1988 The Regents of the University of California.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)limits.h	7.2 (Berkeley) 6/28/90
+
+//	$OpenBSD: cdefs.h,v 1.43 2018/10/29 17:10:40 guenther Exp $
+//	$NetBSD: cdefs.h,v 1.16 1996/04/03 20:46:39 christos Exp $
+
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.7 (Berkeley) 1/21/94
+
+// max value for unsigned long
+// max value for a signed long
+// min value for a signed long
+
+// max value for unsigned long long
+// max value for a signed long long
+// min value for a signed long long
+
+//	$OpenBSD: syslimits.h,v 1.14 2020/04/02 18:00:00 deraadt Exp $
+//	$NetBSD: syslimits.h,v 1.12 1995/10/05 05:26:19 thorpej Exp $
+
+// Copyright (c) 1988, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
+
+//	$OpenBSD: cdefs.h,v 1.43 2018/10/29 17:10:40 guenther Exp $
+//	$NetBSD: cdefs.h,v 1.16 1996/04/03 20:46:39 christos Exp $
+
+// Copyright (c) 1991, 1993
+//	The Regents of the University of California.  All rights reserved.
+//
+// This code is derived from software contributed to Berkeley by
+// Berkeley Software Design, Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the University nor the names of its contributors
+//    may be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+//	@(#)cdefs.h	8.7 (Berkeley) 1/21/94
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_windows_386.go b/vendor/modernc.org/libc/limits/limits_windows_386.go
new file mode 100644
index 00000000..7a68f646
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_windows_386.go
@@ -0,0 +1,410 @@
+// Code generated by 'ccgo limits/gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits/limits_windows_386.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	CHAR_BIT                                        = 8
+	CHAR_MAX                                        = 127
+	CHAR_MIN                                        = -128
+	DUMMYSTRUCTNAME                                 = 0
+	DUMMYSTRUCTNAME1                                = 0
+	DUMMYSTRUCTNAME2                                = 0
+	DUMMYSTRUCTNAME3                                = 0
+	DUMMYSTRUCTNAME4                                = 0
+	DUMMYSTRUCTNAME5                                = 0
+	DUMMYUNIONNAME                                  = 0
+	DUMMYUNIONNAME1                                 = 0
+	DUMMYUNIONNAME2                                 = 0
+	DUMMYUNIONNAME3                                 = 0
+	DUMMYUNIONNAME4                                 = 0
+	DUMMYUNIONNAME5                                 = 0
+	DUMMYUNIONNAME6                                 = 0
+	DUMMYUNIONNAME7                                 = 0
+	DUMMYUNIONNAME8                                 = 0
+	DUMMYUNIONNAME9                                 = 0
+	INT_MAX                                         = 2147483647
+	INT_MIN                                         = -2147483648
+	LLONG_MAX                                       = 9223372036854775807
+	LLONG_MIN                                       = -9223372036854775808
+	LONG_LONG_MAX                                   = 9223372036854775807
+	LONG_LONG_MIN                                   = -9223372036854775808
+	LONG_MAX                                        = 2147483647
+	LONG_MIN                                        = -2147483648
+	MB_LEN_MAX                                      = 5
+	MINGW_DDK_H                                     = 0
+	MINGW_HAS_DDK_H                                 = 1
+	MINGW_HAS_SECURE_API                            = 1
+	MINGW_SDK_INIT                                  = 0
+	PATH_MAX                                        = 260
+	SCHAR_MAX                                       = 127
+	SCHAR_MIN                                       = -128
+	SHRT_MAX                                        = 32767
+	SHRT_MIN                                        = -32768
+	SIZE_MAX                                        = 4294967295
+	SSIZE_MAX                                       = 2147483647
+	UCHAR_MAX                                       = 255
+	UINT_MAX                                        = 4294967295
+	ULLONG_MAX                                      = 18446744073709551615
+	ULONG_LONG_MAX                                  = 18446744073709551615
+	ULONG_MAX                                       = 4294967295
+	UNALIGNED                                       = 0
+	USE___UUIDOF                                    = 0
+	USHRT_MAX                                       = 65535
+	WIN32                                           = 1
+	WINNT                                           = 1
+	X_AGLOBAL                                       = 0
+	X_ANONYMOUS_STRUCT                              = 0
+	X_ANONYMOUS_UNION                               = 0
+	X_ARGMAX                                        = 100
+	X_CONST_RETURN                                  = 0
+	X_CRTNOALIAS                                    = 0
+	X_CRTRESTRICT                                   = 0
+	X_CRT_ALTERNATIVE_IMPORTED                      = 0
+	X_CRT_MANAGED_HEAP_DEPRECATE                    = 0
+	X_CRT_PACKING                                   = 8
+	X_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES          = 0
+	X_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES_MEMORY   = 0
+	X_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES        = 0
+	X_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_COUNT  = 0
+	X_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_MEMORY = 0
+	X_CRT_USE_WINAPI_FAMILY_DESKTOP_APP             = 0
+	X_DLL                                           = 0
+	X_ERRCODE_DEFINED                               = 0
+	X_FILE_OFFSET_BITS                              = 64
+	X_GCC_LIMITS_H_                                 = 0
+	X_I16_MAX                                       = 32767
+	X_I16_MIN                                       = -32768
+	X_I32_MAX                                       = 2147483647
+	X_I32_MIN                                       = -2147483648
+	X_I64_MAX                                       = 9223372036854775807
+	X_I64_MIN                                       = -9223372036854775808
+	X_I8_MAX                                        = 127
+	X_I8_MIN                                        = -128
+	X_ILP32                                         = 1
+	X_INC_CORECRT                                   = 0
+	X_INC_CRTDEFS                                   = 0
+	X_INC_CRTDEFS_MACRO                             = 0
+	X_INC_LIMITS                                    = 0
+	X_INC_MINGW_SECAPI                              = 0
+	X_INC_VADEFS                                    = 0
+	X_INC__MINGW_H                                  = 0
+	X_INT128_DEFINED                                = 0
+	X_INTEGRAL_MAX_BITS                             = 64
+	X_INTPTR_T_DEFINED                              = 0
+	X_LIMITS_H___                                   = 0
+	X_MT                                            = 0
+	X_M_IX86                                        = 600
+	X_PGLOBAL                                       = 0
+	X_PTRDIFF_T_                                    = 0
+	X_PTRDIFF_T_DEFINED                             = 0
+	X_RSIZE_T_DEFINED                               = 0
+	X_SECURECRT_FILL_BUFFER_PATTERN                 = 0xFD
+	X_SIZE_T_DEFINED                                = 0
+	X_SSIZE_T_DEFINED                               = 0
+	X_TAGLC_ID_DEFINED                              = 0
+	X_THREADLOCALEINFO                              = 0
+	X_TIME32_T_DEFINED                              = 0
+	X_TIME64_T_DEFINED                              = 0
+	X_TIME_T_DEFINED                                = 0
+	X_UI16_MAX                                      = 0xffff
+	X_UI32_MAX                                      = 0xffffffff
+	X_UI64_MAX                                      = 0xffffffffffffffff
+	X_UI8_MAX                                       = 0xff
+	X_UINTPTR_T_DEFINED                             = 0
+	X_USE_32BIT_TIME_T                              = 0
+	X_VA_LIST_DEFINED                               = 0
+	X_W64                                           = 0
+	X_WCHAR_T_DEFINED                               = 0
+	X_WCTYPE_T_DEFINED                              = 0
+	X_WIN32                                         = 1
+	X_WIN32_WINNT                                   = 0x502
+	X_WINT_T                                        = 0
+	X_X86_                                          = 1
+	I386                                            = 1
+)
+
+type Ptrdiff_t = int32 /* <builtin>:3:26 */
+
+type Size_t = uint32 /* <builtin>:9:23 */
+
+type Wchar_t = uint16 /* <builtin>:15:24 */
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+type Va_list = X__builtin_va_list /* <builtin>:50:27 */
+
+// Copyright (C) 1992-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// This macro holds an monotonic increasing value, which indicates
+//    a specific fix/patch is present on trunk.  This value isn't related to
+//    minor/major version-macros.  It is increased on demand, if a big
+//    fix was applied to trunk.  This macro gets just increased on trunk.  For
+//    other branches its value won't be modified.
+
+// mingw.org's version macros: these make gcc to define
+//    MINGW32_SUPPORTS_MT_EH and to use the _CRT_MT global
+//    and the __mingwthr_key_dtor() function from the MinGW
+//    CRT in its private gthr-win32.h header.
+
+// Set VC specific compiler target macros.
+
+// For x86 we have always to prefix by underscore.
+
+// Special case nameless struct/union.
+
+// MinGW-w64 has some additional C99 printf/scanf feature support.
+//    So we add some helper macros to ease recognition of them.
+
+// If _FORTIFY_SOURCE is enabled, some inline functions may use
+//    __builtin_va_arg_pack().  GCC may report an error if the address
+//    of such a function is used.  Set _FORTIFY_VA_ARG=0 in this case.
+
+// Enable workaround for ABI incompatibility on affected platforms
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// http://msdn.microsoft.com/en-us/library/ms175759%28v=VS.100%29.aspx
+// Templates won't work in C, will break if secure API is not enabled, disabled
+
+// https://blogs.msdn.com/b/sdl/archive/2010/02/16/vc-2010-and-memcpy.aspx?Redirected=true
+// fallback on default implementation if we can't know the size of the destination
+
+// Include _cygwin.h if we're building a Cygwin application.
+
+// Target specific macro replacement for type "long".  In the Windows API,
+//    the type long is always 32 bit, even if the target is 64 bit (LLP64).
+//    On 64 bit Cygwin, the type long is 64 bit (LP64).  So, to get the right
+//    sized definitions and declarations, all usage of type long in the Windows
+//    headers have to be replaced by the below defined macro __LONG32.
+
+// C/C++ specific language defines.
+
+// Note the extern. This is needed to work around GCC's
+// limitations in handling dllimport attribute.
+
+// Attribute `nonnull' was valid as of gcc 3.3.  We don't use GCC's
+//    variadiac macro facility, because variadic macros cause syntax
+//    errors with  --traditional-cpp.
+
+//  High byte is the major version, low byte is the minor.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// for backward compatibility
+
+type X__gnuc_va_list = X__builtin_va_list /* vadefs.h:24:29 */
+
+type Ssize_t = int32 /* corecrt.h:52:13 */
+
+type Rsize_t = Size_t /* corecrt.h:57:16 */
+
+type Intptr_t = int32 /* corecrt.h:69:13 */
+
+type Uintptr_t = uint32 /* corecrt.h:82:22 */
+
+type Wint_t = uint16   /* corecrt.h:111:24 */
+type Wctype_t = uint16 /* corecrt.h:112:24 */
+
+type Errno_t = int32 /* corecrt.h:118:13 */
+
+type X__time32_t = int32 /* corecrt.h:123:14 */
+
+type X__time64_t = int64 /* corecrt.h:128:35 */
+
+type Time_t = X__time32_t /* corecrt.h:141:20 */
+
+type Threadlocaleinfostruct = struct {
+	Frefcount      int32
+	Flc_codepage   uint32
+	Flc_collate_cp uint32
+	Flc_handle     [6]uint32
+	Flc_id         [6]LC_ID
+	Flc_category   [6]struct {
+		Flocale    uintptr
+		Fwlocale   uintptr
+		Frefcount  uintptr
+		Fwrefcount uintptr
+	}
+	Flc_clike            int32
+	Fmb_cur_max          int32
+	Flconv_intl_refcount uintptr
+	Flconv_num_refcount  uintptr
+	Flconv_mon_refcount  uintptr
+	Flconv               uintptr
+	Fctype1_refcount     uintptr
+	Fctype1              uintptr
+	Fpctype              uintptr
+	Fpclmap              uintptr
+	Fpcumap              uintptr
+	Flc_time_curr        uintptr
+} /* corecrt.h:435:1 */
+
+type Pthreadlocinfo = uintptr /* corecrt.h:437:39 */
+type Pthreadmbcinfo = uintptr /* corecrt.h:438:36 */
+
+type Localeinfo_struct = struct {
+	Flocinfo Pthreadlocinfo
+	Fmbcinfo Pthreadmbcinfo
+} /* corecrt.h:441:9 */
+
+type X_locale_tstruct = Localeinfo_struct /* corecrt.h:444:3 */
+type X_locale_t = uintptr                 /* corecrt.h:444:19 */
+
+type TagLC_ID = struct {
+	FwLanguage uint16
+	FwCountry  uint16
+	FwCodePage uint16
+} /* corecrt.h:435:1 */
+
+type LC_ID = TagLC_ID  /* corecrt.h:452:3 */
+type LPLC_ID = uintptr /* corecrt.h:452:9 */
+
+type Threadlocinfo = Threadlocaleinfostruct /* corecrt.h:487:3 */
+
+// File system limits
+//
+// NOTE: Apparently the actual size of PATH_MAX is 260, but a space is
+//       required for the NUL. TODO: Test?
+// NOTE: PATH_MAX is the POSIX equivalent for Microsoft's MAX_PATH; the two
+//       are semantically identical, with a limit of 259 characters for the
+//       path name, plus one for a terminating NUL, for a total of 260.
+
+// Copyright (C) 1991-2020 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ int8 /* gen.c:2:13: */
diff --git a/vendor/modernc.org/libc/limits/limits_windows_amd64.go b/vendor/modernc.org/libc/limits/limits_windows_amd64.go
new file mode 100644
index 00000000..de7ff717
--- /dev/null
+++ b/vendor/modernc.org/libc/limits/limits_windows_amd64.go
@@ -0,0 +1,409 @@
+// Code generated by 'ccgo limits\gen.c -crt-import-path "" -export-defines "" -export-enums "" -export-externs X -export-fields F -export-structs "" -export-typedefs "" -header -hide _OSSwapInt16,_OSSwapInt32,_OSSwapInt64 -o limits\limits_windows_amd64.go -pkgname limits', DO NOT EDIT.
+
+package limits
+
+import (
+	"math"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+)
+
+var _ = math.Pi
+var _ reflect.Kind
+var _ atomic.Value
+var _ unsafe.Pointer
+
+const (
+	CHAR_BIT                                        = 8
+	CHAR_MAX                                        = 127
+	CHAR_MIN                                        = -128
+	DUMMYSTRUCTNAME                                 = 0
+	DUMMYSTRUCTNAME1                                = 0
+	DUMMYSTRUCTNAME2                                = 0
+	DUMMYSTRUCTNAME3                                = 0
+	DUMMYSTRUCTNAME4                                = 0
+	DUMMYSTRUCTNAME5                                = 0
+	DUMMYUNIONNAME                                  = 0
+	DUMMYUNIONNAME1                                 = 0
+	DUMMYUNIONNAME2                                 = 0
+	DUMMYUNIONNAME3                                 = 0
+	DUMMYUNIONNAME4                                 = 0
+	DUMMYUNIONNAME5                                 = 0
+	DUMMYUNIONNAME6                                 = 0
+	DUMMYUNIONNAME7                                 = 0
+	DUMMYUNIONNAME8                                 = 0
+	DUMMYUNIONNAME9                                 = 0
+	INT_MAX                                         = 2147483647
+	INT_MIN                                         = -2147483648
+	LLONG_MAX                                       = 9223372036854775807
+	LLONG_MIN                                       = -9223372036854775808
+	LONG_LONG_MAX                                   = 9223372036854775807
+	LONG_LONG_MIN                                   = -9223372036854775808
+	LONG_MAX                                        = 2147483647
+	LONG_MIN                                        = -2147483648
+	MB_LEN_MAX                                      = 5
+	MINGW_DDK_H                                     = 0
+	MINGW_DDRAW_VERSION                             = 7
+	MINGW_HAS_DDK_H                                 = 1
+	MINGW_HAS_DDRAW_H                               = 1
+	MINGW_HAS_SECURE_API                            = 1
+	MINGW_SDK_INIT                                  = 0
+	PATH_MAX                                        = 260
+	SCHAR_MAX                                       = 127
+	SCHAR_MIN                                       = -128
+	SHRT_MAX                                        = 32767
+	SHRT_MIN                                        = -32768
+	SIZE_MAX                                        = 18446744073709551615
+	SSIZE_MAX                                       = 9223372036854775807
+	UCHAR_MAX                                       = 255
+	UINT_MAX                                        = 4294967295
+	ULLONG_MAX                                      = 18446744073709551615
+	ULONG_LONG_MAX                                  = 18446744073709551615
+	ULONG_MAX                                       = 4294967295
+	UNALIGNED                                       = 0
+	USE___UUIDOF                                    = 0
+	USHRT_MAX                                       = 65535
+	WIN32                                           = 1
+	WIN64                                           = 1
+	WINNT                                           = 1
+	X_AGLOBAL                                       = 0
+	X_ANONYMOUS_STRUCT                              = 0
+	X_ANONYMOUS_UNION                               = 0
+	X_ARGMAX                                        = 100
+	X_CONST_RETURN                                  = 0
+	X_CRTNOALIAS                                    = 0
+	X_CRTRESTRICT                                   = 0
+	X_CRT_ALTERNATIVE_IMPORTED                      = 0
+	X_CRT_MANAGED_HEAP_DEPRECATE                    = 0
+	X_CRT_PACKING                                   = 8
+	X_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES          = 0
+	X_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES_MEMORY   = 0
+	X_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES        = 0
+	X_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_COUNT  = 0
+	X_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_MEMORY = 0
+	X_DLL                                           = 0
+	X_ERRCODE_DEFINED                               = 0
+	X_FILE_OFFSET_BITS                              = 64
+	X_GCC_LIMITS_H_                                 = 0
+	X_I16_MAX                                       = 32767
+	X_I16_MIN                                       = -32768
+	X_I32_MAX                                       = 2147483647
+	X_I32_MIN                                       = -2147483648
+	X_I64_MAX                                       = 9223372036854775807
+	X_I64_MIN                                       = -9223372036854775808
+	X_I8_MAX                                        = 127
+	X_I8_MIN                                        = -128
+	X_INC_CRTDEFS                                   = 0
+	X_INC_CRTDEFS_MACRO                             = 0
+	X_INC_LIMITS                                    = 0
+	X_INC_MINGW_SECAPI                              = 0
+	X_INC_VADEFS                                    = 0
+	X_INC__MINGW_H                                  = 0
+	X_INT128_DEFINED                                = 0
+	X_INTEGRAL_MAX_BITS                             = 64
+	X_INTPTR_T_DEFINED                              = 0
+	X_LIMITS_H___                                   = 0
+	X_MT                                            = 0
+	X_M_AMD64                                       = 100
+	X_M_X64                                         = 100
+	X_PGLOBAL                                       = 0
+	X_PTRDIFF_T_                                    = 0
+	X_PTRDIFF_T_DEFINED                             = 0
+	X_REENTRANT                                     = 1
+	X_RSIZE_T_DEFINED                               = 0
+	X_SECURECRT_FILL_BUFFER_PATTERN                 = 0xFD
+	X_SIZE_T_DEFINED                                = 0
+	X_SSIZE_T_DEFINED                               = 0
+	X_TAGLC_ID_DEFINED                              = 0
+	X_THREADLOCALEINFO                              = 0
+	X_TIME32_T_DEFINED                              = 0
+	X_TIME64_T_DEFINED                              = 0
+	X_TIME_T_DEFINED                                = 0
+	X_UI16_MAX                                      = 0xffff
+	X_UI32_MAX                                      = 0xffffffff
+	X_UI64_MAX                                      = 0xffffffffffffffff
+	X_UI8_MAX                                       = 0xff
+	X_UINTPTR_T_DEFINED                             = 0
+	X_VA_LIST_DEFINED                               = 0
+	X_W64                                           = 0
+	X_WCHAR_T_DEFINED                               = 0
+	X_WCTYPE_T_DEFINED                              = 0
+	X_WIN32                                         = 1
+	X_WIN32_WINNT                                   = 0x502
+	X_WIN64                                         = 1
+	X_WINT_T                                        = 0
+)
+
+type Ptrdiff_t = int64 /* <builtin>:3:26 */
+
+type Size_t = uint64 /* <builtin>:9:23 */
+
+type Wchar_t = uint16 /* <builtin>:15:24 */
+
+type X__int128_t = struct {
+	Flo int64
+	Fhi int64
+} /* <builtin>:21:43 */ // must match modernc.org/mathutil.Int128
+type X__uint128_t = struct {
+	Flo uint64
+	Fhi uint64
+} /* <builtin>:22:44 */ // must match modernc.org/mathutil.Int128
+
+type X__builtin_va_list = uintptr /* <builtin>:46:14 */
+type X__float128 = float64        /* <builtin>:47:21 */
+
+type Va_list = X__builtin_va_list /* <builtin>:50:27 */
+
+// Copyright (C) 1992-2018 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// This administrivia gets added to the beginning of limits.h
+//    if the system has its own version of limits.h.
+
+// We use _GCC_LIMITS_H_ because we want this not to match
+//    any macros that the system's limits.h uses for its own purposes.
+
+// Use "..." so that we find syslimits.h only in this same directory.
+// syslimits.h stands for the system's own limits.h file.
+//    If we can use it ok unmodified, then we install this text.
+//    If fixincludes fixes it, then the fixed version is installed
+//    instead of this text.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// This macro holds an monotonic increasing value, which indicates
+//    a specific fix/patch is present on trunk.  This value isn't related to
+//    minor/major version-macros.  It is increased on demand, if a big
+//    fix was applied to trunk.  This macro gets just increased on trunk.  For
+//    other branches its value won't be modified.
+
+// mingw.org's version macros: these make gcc to define
+//    MINGW32_SUPPORTS_MT_EH and to use the _CRT_MT global
+//    and the __mingwthr_key_dtor() function from the MinGW
+//    CRT in its private gthr-win32.h header.
+
+// Set VC specific compiler target macros.
+
+// MS does not prefix symbols by underscores for 64-bit.
+// As we have to support older gcc version, which are using underscores
+//       as symbol prefix for x64, we have to check here for the user label
+//       prefix defined by gcc.
+
+// Special case nameless struct/union.
+
+// MinGW-w64 has some additional C99 printf/scanf feature support.
+//    So we add some helper macros to ease recognition of them.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// http://msdn.microsoft.com/en-us/library/ms175759%28v=VS.100%29.aspx
+// Templates won't work in C, will break if secure API is not enabled, disabled
+
+// https://blogs.msdn.com/b/sdl/archive/2010/02/16/vc-2010-and-memcpy.aspx?Redirected=true
+// fallback on default implementation if we can't know the size of the destination
+
+// Include _cygwin.h if we're building a Cygwin application.
+
+// Target specific macro replacement for type "long".  In the Windows API,
+//    the type long is always 32 bit, even if the target is 64 bit (LLP64).
+//    On 64 bit Cygwin, the type long is 64 bit (LP64).  So, to get the right
+//    sized definitions and declarations, all usage of type long in the Windows
+//    headers have to be replaced by the below defined macro __LONG32.
+
+// C/C++ specific language defines.
+
+// Note the extern. This is needed to work around GCC's
+// limitations in handling dllimport attribute.
+
+// Attribute `nonnull' was valid as of gcc 3.3.  We don't use GCC's
+//    variadiac macro facility, because variadic macros cause syntax
+//    errors with  --traditional-cpp.
+
+//  High byte is the major version, low byte is the minor.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+// *
+// This file has no copyright assigned and is placed in the Public Domain.
+// This file is part of the mingw-w64 runtime package.
+// No warranty is given; refer to the file DISCLAIMER.PD within this package.
+
+type X__gnuc_va_list = X__builtin_va_list /* vadefs.h:24:29 */
+
+type Ssize_t = int64 /* crtdefs.h:45:35 */
+
+type Rsize_t = Size_t /* crtdefs.h:52:16 */
+
+type Intptr_t = int64 /* crtdefs.h:62:35 */
+
+type Uintptr_t = uint64 /* crtdefs.h:75:44 */
+
+type Wint_t = uint16   /* crtdefs.h:106:24 */
+type Wctype_t = uint16 /* crtdefs.h:107:24 */
+
+type Errno_t = int32 /* crtdefs.h:113:13 */
+
+type X__time32_t = int32 /* crtdefs.h:118:14 */
+
+type X__time64_t = int64 /* crtdefs.h:123:35 */
+
+type Time_t = X__time64_t /* crtdefs.h:138:20 */
+
+type Threadlocaleinfostruct = struct {
+	Frefcount      int32
+	Flc_codepage   uint32
+	Flc_collate_cp uint32
+	Flc_handle     [6]uint32
+	Flc_id         [6]LC_ID
+	Flc_category   [6]struct {
+		Flocale    uintptr
+		Fwlocale   uintptr
+		Frefcount  uintptr
+		Fwrefcount uintptr
+	}
+	Flc_clike            int32
+	Fmb_cur_max          int32
+	Flconv_intl_refcount uintptr
+	Flconv_num_refcount  uintptr
+	Flconv_mon_refcount  uintptr
+	Flconv               uintptr
+	Fctype1_refcount     uintptr
+	Fctype1              uintptr
+	Fpctype              uintptr
+	Fpclmap              uintptr
+	Fpcumap              uintptr
+	Flc_time_curr        uintptr
+} /* crtdefs.h:422:1 */
+
+type Pthreadlocinfo = uintptr /* crtdefs.h:424:39 */
+type Pthreadmbcinfo = uintptr /* crtdefs.h:425:36 */
+
+type Localeinfo_struct = struct {
+	Flocinfo Pthreadlocinfo
+	Fmbcinfo Pthreadmbcinfo
+} /* crtdefs.h:428:9 */
+
+type X_locale_tstruct = Localeinfo_struct /* crtdefs.h:431:3 */
+type X_locale_t = uintptr                 /* crtdefs.h:431:19 */
+
+type TagLC_ID = struct {
+	FwLanguage uint16
+	FwCountry  uint16
+	FwCodePage uint16
+} /* crtdefs.h:422:1 */
+
+type LC_ID = TagLC_ID  /* crtdefs.h:439:3 */
+type LPLC_ID = uintptr /* crtdefs.h:439:9 */
+
+type Threadlocinfo = Threadlocaleinfostruct /* crtdefs.h:468:3 */
+
+// File system limits
+//
+// NOTE: Apparently the actual size of PATH_MAX is 260, but a space is
+//       required for the NUL. TODO: Test?
+// NOTE: PATH_MAX is the POSIX equivalent for Microsoft's MAX_PATH; the two
+//       are semantically identical, with a limit of 259 characters for the
+//       path name, plus one for a terminating NUL, for a total of 260.
+
+// Copyright (C) 1991-2018 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+//
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Number of bits in a `char'.
+
+// Maximum length of a multibyte character.
+
+// Minimum and maximum values a `signed char' can hold.
+
+// Maximum value an `unsigned char' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `char' can hold.
+
+// Minimum and maximum values a `signed short int' can hold.
+
+// Maximum value an `unsigned short int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed int' can hold.
+
+// Maximum value an `unsigned int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long int' can hold.
+//    (Same as `int').
+
+// Maximum value an `unsigned long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// Minimum and maximum values a `signed long long int' can hold.
+
+// Maximum value an `unsigned long long int' can hold.  (Minimum is 0).
+
+// This administrivia gets added to the end of limits.h
+//    if the system has its own version of limits.h.
+
+var _ int8 /* gen.c:2:13: */