[arch-dev-public] [toolchain] gcc 4.5 breakage

Thomas Bächler thomas at archlinux.org
Thu May 6 03:45:54 EDT 2010

Am 06.05.2010 09:44, schrieb Thomas Bächler:
> Am 05.05.2010 02:46, schrieb Allan McRae:
>> Interesting...  Does fixing the aliasing fix this one too? I see no
>> upstream bug reports that seem related so you should follow it up there.
>>  I will pull in a new gcc-4.5 snapshot next week when I do the
>> glibc-2.12 toolchain rebuild so hopefully that may contain a fix that I
>> am missing...
> There is no fix in the latest 4.5 branch (or trunk) yet.
> http://gcc.gnu.org/PR43987 has more details.
> Basically, the problem is caused by -ftree-fta, which is on by default
> with -O1 and higher (and also -Os, which I use for busybox). The bug can
> be worked around with -fno-tree-fta until a fix becomes available.

Writing is difficult - it's -free-pta and -fno-tree-pta, of course.

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