Re: [gentoo-user] gcc4.7.2-r1 to 4.7.3 upgrade - hosed system?

[Vaeth <vaeth@mathematik.uni-wuerzburg.de>]

> # gcc-config 2
> * Switching native-compiler to x86_64-pc-linux-gnu-4.7.3 ...
> /usr/bin/python2.7: error while loading shared libraries: libgcc_s.so.1:
> cannot open shared object file: No such file or directory

This is a bug in gcc-config: It removes the old link too early
so that the tools needed to establish the new link do not work
anymore. IIRC correctly, there was a bug reported, but apparently
it is still not fixed.

To repair it manually you must temporarily create the old link.
Here are detailed instruction how to do this:

1. Since tools like "ln -s" will not work, it is best to use busybox.
So first start busybox (e.g. "bb" or "bb sh" depending on your setup).

2. Then go to the gcc library parent directory: On amd64 this should be
cd /usr/lib64/gcc/x86_64-pc-linux-gnu
On i686 this is instead
cd /usr/lib/gcc/i686*
On other architectures, I don't know.

3. Create the symlink from your old directory to the new.
Given the subject, I guess this should be:
ln -s 4.7.3 4.7.2

4. Now gcc-config should work

5. Remove the symlink again
rm 4.7.2

6. Run your env-update as usual and resource the profile

7. Test that gcc-config is still working (it should).