[FFmpeg-devel] [PATCH] Set -mfpmath=sse for cpus that support it

Måns Rullgård mans
Thu Aug 27 21:36:08 CEST 2009

Vitor Sessak <vitor1001 at gmail.com> writes:

> Reimar D?ffinger wrote:
>> On Thu, Aug 27, 2009 at 04:01:53PM +0200, Vitor Sessak wrote:
>>> M?ns Rullg?rd wrote:
>>>> You can't use check_cflags there.  Is there any reason to not attempt
>>>> using this flag with --cpu values?  I imagine a simple check_cflags
>>>> line together with the other x86 stuff (ebx checks etc) should be
>>>> enough.
>>> I can't just call "check_cflags -mfpmath=sse" for every x86 CPU
>>> because GCC does not fail with "-march=386 -mfpmath=sse", it gives
>>> a warning and uses 387 (so check_cflags would always add it). But I
>>> moved it to the more relevant part of the source (new patch
>>> attached).
>> Huh? That reads to me like "check_cflags -mfpmath=sse" would do
>> exactly
>> the same thing (well, except for some ugly warnings).
> Yes, but I thought the ugly warnings are not acceptable.

Add a flag to kill them.

M?ns Rullg?rd
mans at mansr.com

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