}

var (
	dynlib          []string
	ldflag          []string
	havedynamic     int
	Funcalign       int
	iscgo           bool
	elfglobalsymndx int
	interpreter     string

	debug_s bool // backup old value of debug['s']
	HEADR   int32

	nerrors  int
	liveness int64 // size of liveness data (funcdata), printed if -v

	// See -strictdups command line flag.
	checkStrictDups   int // 0=off 1=warning 2=error

			gt.buildmode = ""
			if linkmode == "external" {
				ldflags = append(ldflags, `-extldflags "-static -pthread"`)
			} else if linkmode == "auto" {
				gt.env = append(gt.env, "CGO_LDFLAGS=-static -pthread")
			} else {
				panic("unknown linkmode with static build: " + linkmode)
			}
			gt.tags = append(gt.tags, "static")
		}
		gt.ldflags = strings.Join(ldflags, " ")

		t.registerTest(heading, gt, opts...)

	var debug, distpack, force, noBanner, noClean bool
	flag.BoolVar(&rebuildall, "a", rebuildall, "rebuild all")
	flag.BoolVar(&debug, "d", debug, "enable debugging of bootstrap process")
	flag.BoolVar(&distpack, "distpack", distpack, "write distribution files to pkg/distpack")
	flag.BoolVar(&force, "force", force, "build even if the port is marked as broken")
	flag.BoolVar(&noBanner, "no-banner", noBanner, "do not print banner")

			for i := 0; i < len(flags); i++ {
				flag := flags[i]
				switch {
				case strings.HasPrefix(flag, "-gcflags="):
					cmdline[2] += " " + strings.TrimPrefix(flag, "-gcflags=")
				case strings.HasPrefix(flag, "--gcflags="):
					cmdline[2] += " " + strings.TrimPrefix(flag, "--gcflags=")
				case flag == "-gcflags", flag == "--gcflags":
					i++
					if i < len(flags) {

	return fs
}

// newFakeFlagSet constructs a pflag.FlagSet with the same flags as fs, but where
// all values have noop Set implementations
func newFakeFlagSet(fs *pflag.FlagSet) *pflag.FlagSet {
	ret := pflag.NewFlagSet("", pflag.ExitOnError)
	ret.SetNormalizeFunc(fs.GetNormalizeFunc())
	fs.VisitAll(func(f *pflag.Flag) {
		ret.VarP(cliflag.NoOp{}, f.Name, f.Shorthand, f.Usage)
	})
	return ret
}

	skipIfGccgo(t, "gccgo does not support -ldflags -X")
	tooSlow(t, "compiles and links a binary")

	tg := testgo(t)
	defer tg.cleanup()
	tg.parallel()
	tg.tempFile("main.go", `package main
		var extern string
		func main() {
			println(extern)
		}`)
	tg.run("run", "-ldflags", `-X "main.extern=hello world"`, tg.path("main.go"))
	tg.grepStderr("^hello world", `ldflags -X "main.extern=hello world"' failed`)
}

	}
	return nil
}

func (v *upgradeFlag) String() string { return "" }

// dFlag is a custom flag.Value for the deprecated -d flag
// which will be used to provide warnings or errors if -d
// is provided.
type dFlag struct {
	value bool
	set   bool
}

func (v *dFlag) IsBoolFlag() bool { return true }

func (v *dFlag) Set(s string) error {
	v.set = true
	value, err := strconv.ParseBool(s)

// These lines set CFLAGS, CPPFLAGS, CXXFLAGS and LDFLAGS and pkg-config directives
// that affect the way cgo's C code is built.
func (ctxt *Context) saveCgo(filename string, di *Package, cg *ast.CommentGroup) error {
	text := cg.Text()
	for _, line := range strings.Split(text, "\n") {
		orig := line

		// Line is
		//	#cgo [GOOS/GOARCH...] LDFLAGS: stuff
		//
		line = strings.TrimSpace(line)

		for _, arg := range args {
			if !strings.HasPrefix(arg, "-g") {
				p.GccOptions = append(p.GccOptions, arg)
			}
		}
	}
	if flag == "LDFLAGS" {
		p.LdFlags = append(p.LdFlags, args...)
	}
}

// splitQuoted splits the string s around each instance of one or more consecutive
// white space characters while taking into account quotes and escaping, and

		fmt.Fprintln(os.Stderr)

		goFlag := ""
		if goVersion != MainModules.GoVersion() {
			goFlag = " -go=" + goVersion
		}

		compatFlag := ""
		if compatVersion != gover.Prev(goVersion) {
			compatFlag = " -compat=" + compatVersion
		}
		if suggestUpgrade {
			eDesc := ""
			eFlag := ""
			if suggestEFlag {
				eDesc = ", leaving some packages unresolved"