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

Xidorn Quan quanxunzhen at gmail.com
Sun Sep 23 04:32:33 CEST 2012

On Sun, Sep 23, 2012 at 9:57 AM, Michael Niedermayer <michaelni at gmx.at>wrote:

> On Fri, Sep 21, 2012 at 06:15:39PM +0200, Michael Niedermayer 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
> >
> > Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> if there are no objections i will apply this tomorrow, it fixes
> libpostproc on pre MMX2 cpus

Most people should prefer to compile for their own cpu which is
hardly changed. Only those who distribute binary packages would like
to enable runtime cpu detection. So I think it is better to disable
it by default, and notice the distributors to enable it themselves.

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