}

	newID := 0
	readAndRemoveCgoFlags := func(archive string) (string, error) {
		newID++
		newArchive := root.Objdir + fmt.Sprintf("_pkg%d_.a", newID)
		if err := sh.CopyFile(newArchive, archive, 0666, false); err != nil {
			return "", err
		}
		if cfg.BuildN || cfg.BuildX {
			sh.ShowCmd("", "ar d %s _cgo_flags", newArchive)
			if cfg.BuildN {
				// TODO(rsc): We could do better about showing the right _cgo_flags even in -n mode.

	exe := ""
	if goos == "windows" {
		exe = ".exe"
	}
	version, versionTime := readVERSION(goroot)

	// Start with files from GOROOT, filtering out non-distribution files.
	base, err := NewArchive(goroot)
	if err != nil {
		log.Fatal(err)
	}
	base.SetTime(versionTime)
	base.SetMode(mode)
	base.Remove(
		".git/**",
		".gitattributes",
		".github/**",
		".gitignore",