两个gcc，怎样删除一个

guoys

一个3.3.6，一个3.4.5，现在用的是3.4.5，怎样删除3.3.6？

wecoh

http://gentoo-wiki.com/HOWTO_Migrate_to_GCC_3.4


Removing gcc-3.3.x

You'll probably find that an emerge world will try and upgrade your gcc-3.3.x install even when you're running on 3.4.x. To stop this from happening you can remove gcc-3.3.x from your system.

DO NOT do this until you have tested your system with gcc 3.4.x as the following procedures disables the ability to revert back to 3.3.x.

REMEMBER this is a dangerous step and can result in an impaired system (in the case of missing libstdc++ on depclean). This step must be done after the previous ones.

If unfortunately, you have removed gcc-3.3.x without re-emerging system, you'll perhaps get an error: "libstdc++.so.5 can not be found". At this moment, you can get the file from original gentoo installation CD (unpack it from the package, be sure the gcc version is the same) and copy it to /usr/lib/, then you can go back to the previous step to re-emerge system.

N.B. Before doing this you should check that none of your packages have gcc-3.3.x as a dependency by running:

# emerge -pv --update --deep world --tree

Remove gcc-3.3.x from your system.

# emerge -C =gcc-3.3.<version>

You can find your <version> by typing

# gcc-config -l

and subsituting <version> for your entire build number - eg) =gcc-3.3.5.2005018-r1

After the unmerge you may need to repair some libraries do this using revdep-rebuild (may take some time)

# revdep-rebuild

note: some binary packages require the old libstdc++ library, these packages can be repaired by emerging libstdc++-v3 so if you get problems with missing libstdc++ usually related to realplay

# emerge libstdc++-v3

fei

不用删gcc-config就行了。说不定以后还用得上

Steve3d

删不删都可以，要删的最简单的办法就是emerge -P gcc

vulcan

换了gcc，那个以前好多软件要重新编译吗？代价太大了吧？用gcc-3.4.x的性能上有多少的提高呢？

younker

我一项保留两个gcc， 现在是3.4.5 和4.1.0, 4.0.2被删除了。