// -static -pie doesn't make sense, and causes link errors.
			// Issue 26197.
			n := make([]string, 0, len(ldflags)-1)
			for _, flag := range ldflags {
				if flag != "-static" {
					n = append(n, flag)
				}
			}
			ldflags = n
		}
	}
	if err := b.gccld(a, objdir, dynobj, ldflags, linkobj); err != nil {

		if compiler.name == "gcc" {
			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:

[!GOOS:darwin] skip
[!cgo] skip

! go build
stderr 'invalid flag in #cgo LDFLAGS: -lto_library'

-- go.mod --
module ldflag

-- main.go --
package main

// #cgo CFLAGS: -flto
// #cgo LDFLAGS: -lto_library bad.dylib
import "C"

	} else {
		compiler = envList("CC", cfg.DefaultCC(cfg.Goos, cfg.Goarch))
	}
	ldflags = append(ldflags, "-buildmode="+ldBuildmode)
	if root.buildID != "" {
		ldflags = append(ldflags, "-buildid="+root.buildID)
	}
	ldflags = append(ldflags, forcedLdflags...)
	ldflags = append(ldflags, root.Package.Internal.Ldflags...)
	ldflags, err := setextld(ldflags, compiler)
	if err != nil {
		return err
	}

[!GOOS:linux] skip
[!compiler:gc] skip
[!cgo] skip
[!GOARCH:ppc64le] skip

go build -ldflags='-linkmode=internal'
exec ./abitest
stdout success

go build -buildmode=pie -o abitest.pie -ldflags='-linkmode=internal'
exec ./abitest.pie
stdout success

-- go.mod --
module abitest

-- abitest.go --
package main

/*
#cgo CFLAGS: -Os

int foo_fpr() {
        asm volatile("":::"fr31","fr30","fr29","fr28");
}

}

func TestToleratesOptimizationFlag(t *testing.T) {
	for _, cflags := range []string{
		"",
		"-O",
	} {
		cflags := cflags
		t.Run(cflags, func(t *testing.T) {
			testenv.MustHaveGoBuild(t)
			testenv.MustHaveCGO(t)
			t.Parallel()

			cmd := exec.Command("go", "build", path("issue14669.go"))
			cmd.Env = append(os.Environ(), "CGO_CFLAGS="+cflags)
			out, err := cmd.CombinedOutput()
			if err != nil {

		t.Logf("%s %v -c -o %s %s", cc, cflags, obj, csrcFile)
		if out, err := testenv.Command(t, cc, append(cflags, "-c", "-o", obj, csrcFile)...).CombinedOutput(); err != nil {
			t.Logf("%s", out)
			t.Fatal(err)
		}
	}

	sysoObj := filepath.Join(dir, "ldr.syso")
	t.Logf("%s %v -nostdlib -r -o %s %v", cc, cflags, sysoObj, objs)

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

//go:build msan && ((linux && (amd64 || arm64 || loong64)) || (freebsd && amd64))

package msan

/*
#cgo CFLAGS: -fsanitize=memory
#cgo LDFLAGS: -fsanitize=memory

#include <stdint.h>
#include <sanitizer/msan_interface.h>

void __msan_read_go(void *addr, uintptr_t sz) {
	__msan_check_mem_is_initialized(addr, sz);
}

	return m.Run()
}

func goCmd(t *testing.T, op string, args ...string) string {
	if t != nil {
		t.Helper()
	}
	var flags []string
	if op != "tool" {
		flags = []string{"-gcflags", gcflags}
	}
	return run(t, filepath.Join(goroot, "bin", "go"), append(append([]string{op}, flags...), args...)...)
}

// escape converts a string to something suitable for a shell command line.

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

//go:build asan && linux && (arm64 || amd64 || loong64 || riscv64 || ppc64le)

package asan

/*
#cgo CFLAGS: -fsanitize=address
#cgo LDFLAGS: -fsanitize=address

#include <stdbool.h>
#include <stdint.h>
#include <sanitizer/asan_interface.h>

void __asan_read_go(void *addr, uintptr_t sz, void *sp, void *pc) {