}
		}
		for _, x := range validNext {
			if arg == x {
				if i+1 < len(list) && load.SafeArg(list[i+1]) {
					i++
					continue Args
				}

				// Permit -Wl,-framework -Wl,name.
				if i+1 < len(list) &&
					strings.HasPrefix(arg, "-Wl,") &&
					strings.HasPrefix(list[i+1], "-Wl,") &&
					load.SafeArg(list[i+1][4:]) &&
					!strings.Contains(list[i+1][4:], ",") {
					i++
					continue Args

}

// safeArg reports whether arg is a "safe" command-line argument,
// meaning that when it appears in a command-line, it probably
// doesn't have some special meaning other than its own name.
// This is copied from SafeArg in cmd/go/internal/load/pkg.go.
func safeArg(name string) bool {
	if name == "" {
		return false
	}
	c := name[0]

	// so we shouldn't see any _cgo_ files anyway, but just be safe.
	for _, file := range inputs {
		if !SafeArg(file) || strings.HasPrefix(file, "_cgo_") {
			setError(fmt.Errorf("invalid input file name %q", file))
			return
		}
	}
	if name := pathpkg.Base(p.ImportPath); !SafeArg(name) {
		setError(fmt.Errorf("invalid input directory name %q", name))
		return
	}

			} else if strings.HasPrefix(pcarg, "--") {
				pcflags = append(pcflags, pcarg)
			} else {
				pkgs = append(pkgs, pcarg)
			}
		}
		for _, pkg := range pkgs {
			if !load.SafeArg(pkg) {
				return nil, nil, fmt.Errorf("invalid pkg-config package name: %s", pkg)
			}
		}
		var out []byte
		out, err = sh.runOut(p.Dir, nil, b.PkgconfigCmd(), "--cflags", pcflags, "--", pkgs)