eselect profile选择不同的profile对最终编译结果究竟有什么影响？

我先在选择Server profile，在每次emerge的时候都会提示

我用x86 KEYWORD

* This profile has not been tested thoroughly and is not considered to be
* a supported server profile at this time. For a supported server
* profile, please check the Hardened project (http://hardened.gentoo.org).

* This profile is merely a convenience for people who require a more
* minimal profile, yet are unable to use hardened due to restrictions in
* the software being used on the server. This profile should also be used
* if you require GCC 4.1 or Glibc 2.4 support. If you don't know if this
* applies to you, then it doesn't and you should probably be using
* Hardened, instead.

profile 就是一組 USE 的組合,用不同的 USE 會有什麽區別你應該就明白了

这个profile也不是绝对的吧?

如果我用eselect desktop

然后在make.conf里 -multilib, 编译出来的也就是个no-multilib的系统吧?

原来是USE组合，那警告信息我就忽略了

不仅仅是USE
所有影响portage行为的环境变量
如果说make.conf是portage全局环境的个人定制，那profile就是portage全局环境的系统默认值
只不过不同的架构，不同的软件环境下，profile都会有所不同
所以gentoo提供了很多profile以供选择