* [gentoo-user] CFLAGS/USE...
@ 2006-02-10 16:23 Jarry
2006-02-10 17:30 ` Hemmann, Volker Armin
0 siblings, 1 reply; 2+ messages in thread
From: Jarry @ 2006-02-10 16:23 UTC (permalink / raw
To: gentoo-user
Sorry for asking probably trivial question, but if I have in /etc/make.conf:
CFLAGS="-march=athlon-xp -pipe -O2" ,
does it still make sense to include use-options:
USE="3dnow mmx sse" ???
Or is it selected automaticly by that -march=athlon-xp ?
Jarry
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* Re: [gentoo-user] CFLAGS/USE...
2006-02-10 16:23 [gentoo-user] CFLAGS/USE Jarry
@ 2006-02-10 17:30 ` Hemmann, Volker Armin
0 siblings, 0 replies; 2+ messages in thread
From: Hemmann, Volker Armin @ 2006-02-10 17:30 UTC (permalink / raw
To: gentoo-user
On Friday 10 February 2006 17:23, Jarry wrote:
> Sorry for asking probably trivial question, but if I have in
> /etc/make.conf: CFLAGS="-march=athlon-xp -pipe -O2" ,
>
> does it still make sense to include use-options:
> USE="3dnow mmx sse" ???
yes, because the USE flag is something completly different from the CFLAG
>
> Or is it selected automaticly by that -march=athlon-xp ?
it is selected by march for the CFLAGS, but some apps have additional
optimiziations built in, that have to be activated with configure options.
That is where the USE flags come to action.
So, set them in the useflags too, there are some apps that use them for
better performance.
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2006-02-10 17:30 ` Hemmann, Volker Armin
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