// going to compile.
	goFile = objdir + goFile
	newGoFile := objdir + "_" + base + "_swig.go"
	if cfg.BuildX || cfg.BuildN {
		sh.ShowCmd("", "mv %s %s", goFile, newGoFile)
	}
	if !cfg.BuildN {
		if err := os.Rename(goFile, newGoFile); err != nil {
			return "", "", err
		}
	}
	return newGoFile, objdir + gccBase + gccExt, nil
}