},
		{
			name:             "bindnow-linkmode-internal",
			args:             []string{"-ldflags", "-bindnow -linkmode=internal"},
			prog:             progC,
			mustHaveCGO:      true,
			mustInternalLink: true,
			wantDfBindNow:    true,
			wantDf1Now:       true,
		},
		{
			name:                 "bindnow-pie-linkmode-internal",

			}
			s := ctxt.loader.Lookup(name, ver)
			if s != 0 {
				ctxt.loader.SetAttrCgoExportDynamic(s, false)
			}
		}
	}
}

func machoadddynlib(lib string, linkmode LinkMode) {
	if seenlib[lib] || linkmode == LinkExternal {
		return
	}
	seenlib[lib] = true

	// Will need to store the library name rounded up
	// and 24 bytes of header metadata. If not enough

# 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"

[!case-sensitive] cd $WORK/GoPath/src/my/cmd/prog
go build -a -n -ldflags=-X=math.pi=3
stderr 'link.* -X=math.pi=3'

# cgo.a should not be a dependency of internally-linked go package
go build -ldflags='-linkmode=external -linkmode=internal' -n prog.go
! stderr 'packagefile .*runtime/cgo.a'

-- z1/z.go --
package z1
import _ "y"
import _ "z2"

-- z1/z_test.go --
package z1_test
import "testing"
import _ "z3"

# 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");

env GOFLAGS='-m -v'
go version
stdout '^go version'
env GOFLAGS=

env GO111MODULE=on

# Check that very basic version lookup succeeds.
go build empty.go
go version empty$GOEXE
[cgo] go build -ldflags=-linkmode=external empty.go
[cgo] go version empty$GOEXE

# Skip the remaining builds if we are running in short mode.
[short] skip

# Check that 'go version' and 'go version -m' work on a binary built in module mode.

	}
	if err != nil {
		t.Fatal(err)
	}

	exe := filepath.Join(tmpdir, "a.exe")
	args := []string{"build", "-o", exe}
	if iscgo {
		linkmode := "internal"
		if isexternallinker {
			linkmode = "external"
		}
		args = append(args, "-ldflags", "-linkmode="+linkmode)
	}
	args = append(args, src)
	out, err := testenv.Command(t, testenv.GoToolPath(t), args...).CombinedOutput()
	if err != nil {

func TestIssue33808(t *testing.T) {
	if runtime.GOOS != "darwin" {
		return
	}
	testenv.MustHaveGoBuild(t)
	testenv.MustHaveCGO(t)
	t.Parallel()

	dir := t.TempDir()

	f := gobuild(t, dir, prog, "-ldflags=-linkmode=external")
	f.Close()

	syms, err := f.Symbols()
	if err != nil {
		t.Fatalf("Error reading symbols: %v", err)
	}

	name := "log.Fatalf"
	for _, sym := range syms {
		if strings.Contains(sym.Name, name) {

# 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
}

# 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

-- go.mod --
module m

go 1.16
-- syso/objTest.s --
#include "textflag.h"

TEXT ·ObjTest(SB), NOSPLIT, $0
	// We do not actually execute this function in the test above, thus