Re: [gentoo-user] USE="mmx mmxext sse sse2 ssse3 3dnow 3dnowext"

[Stroller <stroller@stellar.eclipse.co.uk>]

On 26 May 2009, at 06:10, Volker Armin Hemmann wrote:
>> ...
>> The mplayer ebuild is stated to be "intelligent" about ignoring these
>> flags if necessary, so I'm not sure that "if mplayer works, so will
>> everything else" is a safe conclusion. My question was exactly if it
>> was so - are other ebuilds also as "intelligent" as mplayer?
>>
>> ...
>> I'd disagree. If it were really simple, Portage would take care of it
>> automagically for me. It (apparently?) doesn't.
>
> portage does not take care. mplayers build has a cpu feature  
> autodection.
>
> Different stuff. Really.

Right, that was the question. Thank you for answering it. Sorry if I  
was unclear.

>> Looks like `echo media-video/mplayer mmx mmxext sse sse2 ssse3 3dnow
>> 3dnowext >> /etc/portage/package.use` unless someone else is able to
>> be more informative.
>
> yeah, except that is bullshit

So? It doesn't matter. Uh, I mean - that's what you just told me.

> no pentium can do 3dnow.

I did think that. But with other instructions adopted by the other  
manufacturer (eg. Intel adopted the amd64 architecture, I think?) it  
seemed odd that a set of instructions would be ignored so long.

> Or was there a 3dnow flag in /proc/mtrr? No? Then
> don't even touch it. Same for ssse3. This has nothing to do with  
> sse3. It is
> something completly different. And p4 never had this.

That's cool. I'll just keep minimal hardware USE flags in make.conf;  
in /etc/portage/package.use I'll tell mplayer to USE everything  
(including 3dnow) that it can.

Thanks,

Stroller.