//go:build freebsd

package cgo

import _ "unsafe" // for go:linkname

// Supply environ and __progname, because we don't
// link against the standard FreeBSD crt0.o and the
// libc dynamic library needs them.

//go:linkname _environ environ
//go:linkname _progname __progname

//go:cgo_export_dynamic environ
//go:cgo_export_dynamic __progname

var _environ uintptr

//go:build netbsd

package cgo

import _ "unsafe" // for go:linkname

// Supply environ and __progname, because we don't
// link against the standard NetBSD crt0.o and the
// libc dynamic library needs them.

//go:linkname _environ environ
//go:linkname _progname __progname
//go:linkname ___ps_strings __ps_strings

var _environ uintptr
var _progname uintptr

			// g0 to ensure we have enough room to call a libc function.
			//
			// The function literal that we pass to systemstack is not nosplit, but
			// that's ok: we'll be running on a fresh, clean system stack so the stack
			// check will always succeed anyway.
			systemstack(func() {
				ret = callCgoSigaction(uintptr(sig), new, old)
			})
		}

		const EINVAL = 22
		if ret == EINVAL {

// license that can be found in the LICENSE file.

//go:build solaris

package lif

import (
	"syscall"
	"unsafe"
)

//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"

//go:linkname procIoctl libc_ioctl

var procIoctl uintptr

func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno)

func ioctl(s, ioc uintptr, arg unsafe.Pointer) error {

+  __extension__ struct __gconv_step_data __data[0];
 } *__gconv_t;
 
 #endif /* gconv.h */
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index c555bf2..143b26d 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -107,6 +107,11 @@
 # endif
 #endif
 
+#ifndef __attribute_copy__
+/* Provide an empty definition when cdefs.h is not included.  */

// mksysnum_plan9.sh /opt/plan9/sys/src/libc/9syscall/sys.h
// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT

package plan9

const (
	SYS_SYSR1       = 0
	SYS_BIND        = 2
	SYS_CHDIR       = 3
	SYS_CLOSE       = 4
	SYS_DUP         = 5
	SYS_ALARM       = 6
	SYS_EXEC        = 7
	SYS_EXITS       = 8
	SYS_FAUTH       = 10
	SYS_SEGBRK      = 12
	SYS_OPEN        = 14
	SYS_OSEEK       = 16
	SYS_SLEEP       = 17

			{".dwarnge", 0x00000000, 0x00000020, STYP_DWARF | SSUBTYP_DWARNGE, 0x7f5a, 0x2},
			{".dwloc", 0x00000000, 0x00000074, STYP_DWARF | SSUBTYP_DWLOC, 0, 0},
			{".debug", 0x00000000, 0x00005e4f, STYP_DEBUG, 0, 0},
		},
		[]string{"libc.a/shr.o"},
	},
	{
		"testdata/gcc-ppc64-aix-dwarf2-exec",
		FileHeader{U64_TOCMAGIC},
		[]*SectionHeader{
			{".text", 0x10000480, 0x00000afd, STYP_TEXT, 0x8322, 0x34},

import (
	"reflect"
	"testing"
	"time"
)

const ubuntuTrustyAvahi = `# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the libc-doc-reference' and nfo' packages installed, try:
# nfo libc "Name Service Switch"' for information about this file.

passwd:         compat
group:          compat
shadow:         compat

hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4

//go:linkname syscall_syscall6 syscall.syscall6
func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)

func libc_faccessat_trampoline()

//go:cgo_import_dynamic libc_faccessat faccessat "libc.so"

func faccessat(dirfd int, path string, mode uint32, flags int) error {
	p, err := syscall.BytePtrFromString(path)
	if err != nil {
		return err
	}

package runtime

import (
	"internal/abi"
	"unsafe"
)

// The X versions of syscall expect the libc call to return a 64-bit result.
// Otherwise (the non-X version) expects a 32-bit result.
// This distinction is required because an error is indicated by returning -1,
// and we need to know whether to check 32 or 64 bits of the result.
// (Some libc functions that return 32 bits put junk in the upper 32 bits of AX.)