}
	return nil
}

func findGoroot() (string, error) {
	gorootOnce.Do(func() {
		// If runtime.GOROOT reports a non-empty path, assume that it is valid.
		// (It may be empty if this binary was built with -trimpath.)
		gorootPath = runtime.GOROOT()
		if gorootPath != "" {
			return
		}

		// runtime.GOROOT is empty — perhaps go_android_exec was built with

}

func versionBanner(c *cli.Context) io.Reader {
	banner := &strings.Builder{}
	fmt.Fprintln(banner, color.Bold("%s version %s (commit-id=%s)", c.App.Name, c.App.Version, CommitID))
	fmt.Fprintln(banner, color.Blue("Runtime:")+color.Bold(" %s %s/%s", runtime.Version(), runtime.GOOS, runtime.GOARCH))

		log.Fatal(err)
	}
	defer buf.Close()

	if !*flags.SymABIs {
		buf.WriteString(objabi.HeaderString())
		fmt.Fprintf(buf, "!\n")
	}

	// Set macros for GOEXPERIMENTs so we can easily switch
	// runtime assembly code based on them.
	if objabi.LookupPkgSpecial(ctxt.Pkgpath).AllowAsmABI {
		for _, exp := range buildcfg.Experiment.Enabled() {
			flags.D = append(flags.D, "GOEXPERIMENT_"+exp)
		}
	}

	var ok, diag bool