// misc/cgo to take advantage of the testing framework support for
// when -static is expected to work.

package nocgo

func NoCgo() int {
	c := make(chan int)

	// The test is run with external linking, which means that
	// goroutines will be created via the runtime/cgo package.
	// Make sure that works.
	go func() {
		c <- 42
	}()

	return <-c

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !windows && !static && !(darwin && internal)

// Excluded in darwin internal linking PIE (which is the default) mode,
// as dynamic export is not supported.

package cgotest

/*
#include <stdint.h>
#include <dlfcn.h>
#cgo linux LDFLAGS: -ldl

extern uintptr_t dlopen4029(char*, int);

    String getObjectFileExtension();

    String getExecutableName(String executablePath);

    String getSharedLibraryName(String libraryPath);

    /**
     * Does this tool chain produce an import library when linking a shared library?
     */
    boolean producesImportLibrary();

    /**
     * Whether or not this tool chain requires a debuggable binary to be stripped or whether the binary is stripped by default.
     */

 * limitations under the License.
 */

package org.gradle.nativeplatform.toolchain.internal;

import java.io.File;

/**
 * Tools for compiling and linking native languages.
 */
public interface NativeLanguageTools extends ExecutableTools {
    File getCompilerExecutable();

    File getLinkerExecutable();

    File getArchiverExecutable();

type sparseBlocks struct {
	values []valueRange
	offset []uint16
}

var idnaSparse = sparseBlocks{
	values: idnaSparseValues[:],
	offset: idnaSparseOffset[:],
}

// Don't use newIdnaTrie to avoid unconditional linking in of the table.
var trie = &idnaTrie{}

// lookup determines the type of block n and looks up the value for b.
// For n < t.cutoff, the block is a simple lookup table. Otherwise, the block

# Test case for issue 47993, in which the linker crashes
# on a bad input instead of issuing an error and exiting.

# This test requires external linking, so use cgo as a proxy 
[!cgo] skip

! go build -ldflags='-linkmode=external' .
! stderr 'panic'
stderr '^.*undefined symbol in relocation.*'

-- go.mod --

module issue47993

go 1.16

-- main.go --

package main

type M struct {
	b bool
}

	"path/filepath"
	"syscall"
)

const syscallExecSupported = true

// execArchive invokes the archiver tool with syscall.Exec(), with
// the expectation that this is the last thing that takes place
// in the linking operation.
func (ctxt *Link) execArchive(argv []string) {
	var err error
	argv0 := argv[0]
	if filepath.Base(argv0) == argv0 {
		argv0, err = exec.LookPath(argv0)
		if err != nil {

		out.munmap()
	}

	for {
		if err = out.fallocate(filesize); err != syscall.EINTR {
			break
		}
	}
	if err != nil {
		// Some file systems do not support fallocate. We ignore that error as linking
		// can still take place, but you might SIGBUS when you write to the mmapped
		// area.
		if err != syscall.ENOTSUP && err != syscall.EPERM && err != errNoFallocate {
			return err
		}
	}

	// argv as argc string pointers followed by a NULL, envv as a
	// sequence of string pointers followed by a NULL, and auxv.
	// There is no TLS base pointer.
	//
	// TODO(austin): Support ABI v1 dynamic linking entry point
	XOR	R0, R0 // Note, newer kernels may not always set R0 to 0.
	MOVD	$runtime·rt0_go(SB), R12
	MOVD	R12, CTR
	MOVBZ	runtime·iscgo(SB), R5
	CMP	R5, $0
	BEQ	nocgo
	BR	(CTR)
nocgo:

# embedded in a package, that is referenced by a Go assembly function.
# See issue 33139.

[!compiler:gc] skip
[!cgo] skip
[short] skip 'invokes system C compiler'

# External linking is not supported on linux/ppc64.
# See: https://github.com/golang/go/issues/8912
[GOOS:linux] [GOARCH:ppc64] skip

cc -c -o syso/objTestImpl.syso syso/src/objTestImpl.c
go build -ldflags='-linkmode=external' ./cmd/main.go