Re: ffmpeg 2.8.6-1 test failures on hppa
On 2016-02-07, at 1:29 PM, John David Anglin wrote:
> On 2016-02-07, at 12:00 PM, John David Anglin wrote:
>
>> We really need a testcase to isolate the problematic gcc change.
>
> I've extracted preprocessed source from libavutil/crc.c. The crc-test has no dependencies on
> any ffmpeg libraries, so it's a good test to use to find gcc problem.
>
> Program seems to compile okay with gcc-4.9.
Program compiles okay with my latest build of gcc-6 but gcc-5_5.3.1-8 fails as expected.
Gcc-5 was bootstrapped using itself. Suspect it was mis-compiled in stage1 leading
to current bug. This type of bug can be hard to find.
Maybe problem will go away if gcc-5 is bootstrapped with gcc-4.9.
Dave
--
John David Anglin dave.anglin@bell.net
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