c.cFlags = append(c.cFlags, "-fPIC")
			c.ldFlags = append(c.ldFlags, "-fPIC", "-static-libtsan")
		}

	case "address":
		c.goFlags = append(c.goFlags, "-asan")
		// Set the debug mode to print the C stack trace.
		c.cFlags = append(c.cFlags, "-g")

	case "fuzzer":
		c.goFlags = append(c.goFlags, "-tags=libfuzzer", "-gcflags=-d=libfuzzer")

	default:

# This test checks that external linking with --gc-sections does not strip version information.

[short] skip
[!cgo] skip
[GOOS:aix] skip  # no --gc-sections
[GOOS:darwin] skip  # no --gc-sections

go build -ldflags='-linkmode=external -extldflags=-Wl,--gc-sections'
go version hello$GOEXE
! stdout 'not a Go executable'
! stderr 'not a Go executable'

-- go.mod --
module hello
-- hello.go --
package main

/*
*/
import "C"

env GO111MODULE=off

# check for linker name in error message about linker crash
[!compiler:gc] skip
! go build -ldflags=-crash_for_testing x.go
stderr [\\/]tool[\\/].*[\\/]link

-- x.go --

// runindir -goexperiment fieldtrack -ldflags -k=main.fieldTrackInfo

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package issue8756

/*
#cgo !darwin LDFLAGS: -lm
#include <math.h>
*/
import "C"

func Pow() {
	C.pow(1, 2)

// rundir -ldflags -strictdups=2 -w=0

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !nacl && !js

// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build darwin

package issue24161arg

/*
#cgo LDFLAGS: -framework CoreFoundation
#include <CoreFoundation/CoreFoundation.h>
*/
import "C"
import "testing"

func Test(t *testing.T) {
	a := test24161array()
	C.CFArrayCreateCopy(0, a)

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package lib

/*
#cgo darwin CFLAGS: -D__MAC_OS_X_VERSION_MAX_ALLOWED=101450
#cgo darwin LDFLAGS: -framework Foundation -framework AppKit
#include "stdlib.h"
int function(void);
*/
import "C"
import "fmt"

func DoC() {
	C.function()
	fmt.Println("called c function")

#
# Note, older gcc/clang may accept this option, but
# ignore it if binutils does not support the relocs.
[!compiler:gc] skip
[!cgo] skip
[!GOARCH:ppc64le] skip

env CGO_CFLAGS='-fno-plt -O2 -g'

go build -ldflags='-linkmode=internal'
exec ./noplttest
stdout helloworld

-- go.mod --
module noplttest

-- noplttest.go --
package main

/*
#include <stdio.h>
void helloworld(void) {
   printf("helloworld\n");

	srcfile := filepath.Join(dir, "test.go")
	arfile := filepath.Join(dir, "test.a")
	if err := os.WriteFile(srcfile, []byte(carchiveSrcText), 0666); err != nil {
		t.Fatal(err)
	}

	ldf := fmt.Sprintf("-ldflags=-v -tmpdir=%s", dir)
	argv := []string{"build", "-buildmode=c-archive", "-o", arfile, ldf, srcfile}
	out, err := testenv.Command(t, testenv.GoToolPath(t), argv...).CombinedOutput()
	if err != nil {