[mythtv] Ticket #4497: Win32 builds broken after r15435

Jay Modi jaymode at gmail.com
Tue Jan 22 12:12:56 UTC 2008


> Cpu type autodetection is broken in configure script, when run in MinGW.
> If you don't use cpu=k8, you will get perfectly compatible i686 build,
> however, without MMX or SSE support. You can expect video codecs, colorspace
> converters etc to run several times slower.
> "K8" is suitable for Pentium 4 and Core Duo, not just AMD CPUs. If you are
> using Pentium M, try to find out which CPU setting you should use, but don't
> just disable it.
>

The cpu=k8 is what had broken the builds probably due to some of the mmx/sse
code being brought in; nothing was ever wrong with the binaries when I had
used it. I will try it out using the pentium-m flag. I suspect this will
still break it because it will bring in both MMX and SSE support, which is
where some of the issues were.

http://gentoo-wiki.com/Safe_Cflags
is a good place to find out what --cpu= you can use. Just take the correct
-march= for your processor. In my case it was just --cpu=pentium-m
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