st := ldr.SymType(s)
	cgoeStatic := ldr.AttrCgoExportStatic(s)
	cgoeDynamic := ldr.AttrCgoExportDynamic(s)
	cgoexp := (cgoeStatic || cgoeDynamic)

	d.AddUint32(target.Arch, uint32(dstru.Addstring(name)))

	if elf64 {

		/* type */
		var t uint8

		if cgoexp && st == sym.STEXT {
			t = elf.ST_INFO(elf.STB_GLOBAL, elf.STT_FUNC)
		} else {

			// So we just check the prefix.

			c := len(goExp)
			if c > len(zstdExp) {
				c = len(zstdExp)
			}
			goExp = goExp[:c]
			zstdExp = zstdExp[:c]
			if !bytes.Equal(goExp, zstdExp) {
				t.Error("byte mismatch after error")
				t.Logf("Go error: %v\n", goErr)
				t.Logf("zstd error: %v\n", zstdErr)
				showDiffs(t, zstdExp, goExp)
			}
		}
	})

		hasGeneratedByComment := false
		for _, line := range strings.Split(strings.TrimSpace(string(out)), "\n") {
			cgoExe := "cgo"
			if runtime.GOOS == "windows" {
				cgoExe = "cgo.exe"
			}
			if !strings.HasPrefix(line, "// "+cgoExe+" -godefs") {
				continue
			}
			if want := "// " + cgoExe + " " + strings.Join(cmd.Args[3:], " "); line != want {
				t.Errorf("%s: got generated comment %q, want %q", fn, line, want)
			}

// configuration tuple and returns the enabled and baseline experiment
// flag sets.
//
// TODO(mdempsky): Move to internal/goexperiment.
func ParseGOEXPERIMENT(goos, goarch, goexp string) (*ExperimentFlags, error) {
	// regabiSupported is set to true on platforms where register ABI is
	// supported and enabled by default.
	// regabiAlwaysOn is set to true on platforms where register ABI is
	// always on.

env GO111MODULE=on

! exists main$GOEXE
go build main.go
exists -exec main$GOEXE
go clean
! exists main$GOEXE

# case2: test module-named executable 'a.b.c'
! exists a.b.c$GOEXE
go build
exists -exec a.b.c$GOEXE
go clean
! exists a.b.c$GOEXE

# case3: directory-named executable 'src'
env GO111MODULE=off

! exists src$GOEXE
go build
exists -exec src$GOEXE
go clean
! exists src$GOEXE

mkdir $WORK/new/pkg/tool
exec $WORK/bin/check$GOEXE $WORK/new/bin/go$GOEXE $WORK/new

[!symlink] stop 'The rest of the test cases require symlinks'

# Symlinked Executable:
# With a symlink into go tree, we should still find the go tree.
mkdir $WORK/other/bin
symlink $WORK/other/bin/go$GOEXE -> $WORK/new/bin/go$GOEXE
exec $WORK/bin/check$GOEXE $WORK/new/bin/go$GOEXE $WORK/new

rm $WORK/new/pkg

# Runtime GOROOT:

go version -m m$GOEXE
stdout '^\tbuild\t-gcflags=example\.com/m=-N$'

go build -ldflags=example.com/m=-w
go version -m m$GOEXE
stdout '^\tbuild\t-ldflags=example\.com/m=-w$'

go build -trimpath
go version -m m$GOEXE
stdout '\tbuild\t-trimpath=true$'

# gccgoflags are not added when gc is used, and vice versa.
# TODO: test gccgo.
go build -gccgoflags=all=UNUSED
go version -m m$GOEXE
! stdout gccgoflags

env GO111MODULE=on
[short] skip

go get rsc.io/fortune/v2

# The default executable name shouldn't be v2$GOEXE
go build rsc.io/fortune/v2
! exists v2$GOEXE
exists fortune$GOEXE

# The default test binary name shouldn't be v2.test$GOEXE
go test -c rsc.io/fortune/v2
! exists v2.test$GOEXE
exists fortune.test$GOEXE

-- go.mod --

stdout '^\tbuild\tvcs.modified=false$'
rm $GOBIN/a$GOEXE

# Building with -buildvcs=false suppresses the info.
go install -buildvcs=false
go version -m $GOBIN/a$GOEXE
! stdout vcs.revision
rm $GOBIN/a$GOEXE

# An untracked file is shown as modified, even if it isn't part of the build.
cp ../../outside/empty.txt .
go install
go version -m $GOBIN/a$GOEXE
stdout '^\tbuild\tvcs=fossil\n'
stdout '^\tbuild\tvcs.modified=true$'

go build -toolexec=$PWD/mytool
[GOARCH:amd64] stderr -count=2 '^asm'${GOEXE}' TOOLEXEC_IMPORTPATH="test/main/withasm"$'
stderr -count=1 '^compile'${GOEXE}' TOOLEXEC_IMPORTPATH="test/main/withasm"$'
[cgo] stderr -count=2 '^cgo'${GOEXE}' TOOLEXEC_IMPORTPATH="test/main/withcgo"$'
[cgo] stderr -count=1 '^compile'${GOEXE}' TOOLEXEC_IMPORTPATH="test/main/withcgo"$'
stderr -count=1 '^compile'${GOEXE}' TOOLEXEC_IMPORTPATH="test/main"$'