[FFmpeg-devel] [PATCH] configure: enable runtime cpu detect by default.

Ronald S. Bultje rsbultje at gmail.com
Fri Sep 21 18:39:47 CEST 2012


On Fri, Sep 21, 2012 at 9:15 AM, Michael Niedermayer <michaelni at gmx.at> wrote:
> with the exception of libpostproc runtime_cpudetect = no is not
> supported thus having no as default really is quite odd, it results in
> a libpostproc where HAVE_MMX* have very different meaning from the
> rest of ffmpeg and it breaks any x86 cpu that doesnt support mmx2
> because mmx2 is hardcoded as a result

Can't you fix libpostproc to enforce runtime cpu detection and remove
the non-runtime cpu detect code? In practice, for x86, there is almost
no conceivable reason to not use runtime cpu detection. Thus, offering
such an option is kind of like offering an option to shoot yourself in
the foot.


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