// Determine kinds for names we already know about,
	// like #defines or 'struct foo', before bothering with gcc.
	var names, needType []*Name
	optional := map[*Name]bool{}
	for _, key := range nameKeys(f.Name) {
		n := f.Name[key]
		// If we've already found this name as a #define
		// and we can translate it as a constant value, do so.
		if n.Define != "" {