Re: [gentoo-user] Remerge the system with gcc-4.1?

["Richard Fish" <bigfish@asmallpond.org>]

On 9/8/06, Grant <emailgrant@gmail.com> wrote:
> I've followed the GCC upgrade guide before without problems, but now
> I'm scared.  Is all the trouble because of how Gentoo works or how GCC
> works?  What is the trouble like?  Packages that won't compile, or
> different things breaking in the system?

There are a few classes of problems here:

1. Packages failing to build with gcc-4.1.  Usually the ~arch version
of that package will build fine, so you may need to accept ~arch
keywords for some packages in package.keywords.  This is by far the
most common and serious issue.

2. C++ ABI issues.  While the system is in the process of being
rebuilt, you can have some C++ programs using a different ABI than the
libraries they link to, or the libraries can have conflicting ABIs.
This should not be a problem once the emerge -e world completes, but
can make it difficult to use the system while this is happening.

3. Problems with other packages being blamed on the gcc upgrade.  FEX
glibc-2.4 is now nptl only, and will no longer work in i386 hosts
(must be i586 or better), and probably conflicts with no-nptl
profiles, etc.

You might want to take a look at the tracker bugs:

http://bugs.gentoo.org/show_bug.cgi?id=140707
http://bugs.gentoo.org/show_bug.cgi?id=117482

-Richard
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