func portRemoved(feature string) bool {
	return strings.Contains(feature, "(darwin-386)") ||
		strings.Contains(feature, "(darwin-386-cgo)")
}

func compareAPI(w io.Writer, features, required, exception []string) (ok bool) {
	ok = true

	featureSet := set(features)
	exceptionSet := set(exception)

	sort.Strings(features)
	sort.Strings(required)