[arch-dev-public] gcc-4.7.1-5 rebuild

Allan McRae allan at archlinux.org
Sun Jul 22 03:25:57 EDT 2012

On 22/07/12 17:24, Allan McRae wrote:
> On 22/07/12 17:17, Eric Bélanger wrote:
>> On Sun, Jul 22, 2012 at 1:21 AM, Allan McRae <allan at archlinux.org> wrote:
>>> Hi all,
>>> gcc-4.7 introduced some c++11 support, but unfortunately this resulted
>>> in a changed ABI for files compiled with c++98/03 support and those
>>> complied with c++11.  So, if a library used c++11 but linked to a
>>> library using c++98, there could be crashes due to incompatibilities
>>> between these.
>>> The gcc-4.7.1-5 package uses a snapshot with the needed patches to fix
>>> this issue.  However, c++11 code compiled with any earlier 4.7.x version
>>> possibly be incompatible with c++11 code compiled with gcc-4.7.1-5 and
>>> above and anything compiled with c++98/03.
>>> I have created a TODO list that includes everything linking to
>>> libstdc++.so and that was built since gcc-4.7.0 entered the repos.  It
>>> is a big list, but only software that used --std=c++11 when compiling
>>> need recompiled.  Look at your build output (you do keep the logs for
>>> future reference...) and decide if your package needs recompiled or not.
>>> More details:
>>> http://jaegerandi.blogspot.com.au/2012/07/gcc-47-c-abi-changes-and-opensuse-122.html
>>> http://gcc.gnu.org/gcc-4.7/changes.html
>>> http://gcc.gnu.org/git/?p=gcc.git;a=commit;h=a245605f
>>> http://gcc.gnu.org/git/?p=gcc.git;a=commit;h=74ca4097
>> I noticed that you pushed the new gcc in the [testing] repo whereas
>> rebuilds are usually done in [staging]. Is that wanted? If so, does
>> the rebuilded packages go in [testing] repo?
> Packages that are broken are already broken...   I don't even intend to
> wait for the rebuild to be finished to move gcc to [core].

Just to clarify, rebuilt packages should go in [testing] until gcc is
signed off and moved.


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