[gentoo-dev] Re: moving gcc-5.2 to unstable

[Ryan Hill <rhill@gentoo.org>]

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On Thu, 1 Oct 2015 09:49:47 -0400
Mike Frysinger <vapier@gentoo.org> wrote:

> what do people want to have in place before we move gcc-5.2 into ~arch ?
> 
> the general list looks pretty good:
> 	https://bugs.gentoo.org/536984

IMO these should be fixed before we unmask:

   546742: x11-apps/sessreg-1.1.0 fail to build with gcc5
   547626: dev-lang/python-3.3 / 3.4 test_faulthandler hangs with GCC 5.1
   547950: app-shells/zsh-5.0.7-r2 builds but has runtime errors with GCC 5
   555866: media-libs/phonon-4.8.3-r1[qt5] fails to build with gcc-5

Just because they're common packages that lots of people will have installed.
Also they all have patches.

> the only glaring issue is the C++11 ABI breakage:
> 	https://bugs.gentoo.org/542482
> 
> we already posted a news item when the breakage started in gcc-4.7:
> 	https://archives.gentoo.org/gentoo-dev/message/4fa0c84858b4df49668da20302fc5b6f
> 
> but since gcc-5.x makes this the new default standard, more people are going
> to run into it, so we probably want a reminder.  do we want any sort of
> automation otherwise here ?

I think we need a news item to remind people they really do have to emerge -e
@world after this one or they could have a bad time.

FWIW I updated one system from 4.9 to 5.2 by rebuilding ~700 packages in random
order just to see how bad the ABI breakage would be and only ran into it once.
I may have just gotten lucky though.


-- 
Ryan Hill                        psn: dirtyepic_sk
   gcc-porting/toolchain/wxwidgets @ gentoo.org

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