F21 system GCC changed to 4.9.0 prerelease

[Josh Boyer]

On Thu, Apr 10, 2014 at 11:01 AM, Josh Boyer <jwboyer at fedoraproject.org> wrote:
> On Thu, Apr 10, 2014 at 10:15 AM, "Jóhann B. Guðmundsson"
> <johannbg at gmail.com> wrote:
>>
>> On 04/10/2014 02:06 PM, Josh Boyer wrote:
>>>
>>> On Thu, Apr 10, 2014 at 6:23 AM, Jakub Jelinek <jakub at redhat.com> wrote:
>>>>
>>>> Hi!
>>>>
>>>> FYI, gcc in rawhide has been upgraded to 4.9.0 prerelease,
>>>> please visit http://gcc.gnu.org/gcc-4.9/porting_to.html if your
>>>> package no longer builds.  To investigate runtime rather than compile
>>>> time
>>>> issues, please consider using temporarily -fsanitize=undefined and/or
>>>> -fsanitize=address to look for undefined behavior in the packages
>>>> you own.
>>>
>>> Hm.  So the kernel I tried to build this morning failed on ARM:
>>>
>>> http://koji.fedoraproject.org/koji/getfile?taskID=6723963&name=build.log
>>>
>>> That cross-built locally (gcc 4.8.1) here fine before I sent it to
>>> koji.  Anyone have any ideas on that?
>>
>> Could be this [1]
>>
>> JBG
>>
>> 1. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60663
>
> Indeed.  I just found that myself.  Thanks.

On the bright side, a scratch build with just i686 and x86_64 does build fine:

http://koji.fedoraproject.org/koji/taskinfo?taskID=6724931

So the issue seems isolated to ARM.  At least in terms of building.
Haven't tested functionality yet.

josh