Bug#722188: Optimizations are not properly applied

[Boyuan Yang]

Hi,

On Sun, 08 Sep 2013 23:13:54 +0200 "Steinar H. Gunderson"
<sgunderson at bigfoot.com> wrote:
> Source: libdvbcsa
> Version: 1.1.0-2
> Severity: normal
> 
> Hello,
> 
> It seems that debian/rules contains:
> 
>   ifeq ($(DEB_HOST_ARCH),amd64)
>   EXTRA_CONFIGURE_ARGS += --enable-mmx --enable-sse2
>   endif
> 
> --enable-mmx overrides --enable-sse2, so this means that the package is
built
> without SSE2 optimizations.

Thanks for the info, this is indeed a bug. I will have it fixed in the next
upload in the next few hours.

> Furthermore, it means that 32-bit packages are not
> built with MMX or SSE2 support, despite every single CPU the last ten years
> (and certainly every CPU anyone would want to decode DVB-CSA on) has
supported
> SSE2. (MMX was added in 1997!)

According to Debian's architecture baseline (
https://wiki.debian.org/ArchitectureSpecificsMemo ), MMX or SSE2 is forbidden
for 32-bit i386 build. Debian's "i386" should only support up to i686. I
cannot add such build flag. Sorry.

> Finally, --enable-altivec should probably be enabled on appropriate CPUs.

According to Debian's architecture baseline (
https://wiki.debian.org/ArchitectureSpecificsMemo ), altivec is not guaranteed
on any architecture. I cannot add such build flag. Sorry.


Thanks,
Boyuan Yang
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