cfiles := str.StringList(p.CFiles)
	sfiles := str.StringList(p.SFiles)
	cxxfiles := str.StringList(p.CXXFiles)
	var objects, cgoObjects, pcCFLAGS, pcLDFLAGS []string

	if p.UsesCgo() || p.UsesSwig() {
		if pcCFLAGS, pcLDFLAGS, err = b.getPkgConfigFlags(a); err != nil {
			return
		}
	}

	// Compute overlays for .c/.cc/.h/etc. and if there are any overlays