[gentoo-dev] more help needed with gcc-4.8 stabilization, chromium starts heavily using C++11

In my earlier thread
<http://thread.gmane.org/gmane.linux.gentoo.devel/92113> I explored the
possibility to stabilize gcc-4.8, and we have that going now in
<https://bugs.gentoo.org/show_bug.cgi?id=516152>.

Meanwhile I just applied a small patch for chromium-38 that allows it to
compile with gcc-4.7. It's in stable now.

We'll really need gcc-4.8 in stable within 6-12 weeks from now. Chromium
starts making heavy use of C++11 language features, see
<http://chromium-cpp.appspot.com/> . I don't realistically see us being
able to just patch chromium to work around that.

I'd like to ask for every possible help with
<https://bugs.gentoo.org/show_bug.cgi?id=461954> blockers on amd64 and
x86. There are harder problems on arches like MIPS, but newer gcc is not
as urgent there I think.

One highlight is <https://bugs.gentoo.org/show_bug.cgi?id=513386>. It
occurs only when the user has gcc-4.7 and 4.8 installed simultaneously
and using 4.7 as the active compiler. It's not obvious to me whether we
have to support this (while it's obviously better to support rather than
not, it's webkit-gtk in a specific and rare configuration versus
chromium with security updates in all configurations).

There is also <https://bugs.gentoo.org/show_bug.cgi?id=500966> which may
be more tricky. I could reproduce that bug. It's also about webkit-gtk.

There are couple more blockers of
<https://bugs.gentoo.org/show_bug.cgi?id=461954>. If you can, please
take a look and help. I think several other distros are using gcc-4.8 or
later now, they may have hit the same problems and either have patches
or something that could also help us. There may be some upstream patches
to be backported etc.

Paweł