sub profile使用的较好的USE标记的默认值，在这种情况下，没有必要改变make.conf: I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE