Beso wrote: >> CFLAGS="-march=nocona -O2 -pipe" > > first of all: nocona breaks your build. nocona isn't an amd processor > but an emt64 (intel). for your processor you need to use march=k8. > also, i'd use -Os instead of -O2 since it has some speed and size > optimizations and it's stable.
-Os optimizes for size, while -O2 optimizes for speed. There is no need at all to use -Os on a modern desktop machine, and it will run comparatively slower than -O2 optimized code, which is probably not what you want. >> CHOST="x86_64-pc-linux-gnu" >> USE="3dnow mmx sse sse2 threads threadpool -multilib" > > sse isn't supported on athlons, so remove it As we're talking about athlon64 here, it definitely is. The Athlon64 X2 supports mmx, mmxext, 3dnow, 3dnowext, sse and sse2. And the AM2 models also support sse3, but not ssse3 or sse4. And as for -march, -march=athlon64 equals -march=k8 (see the gcc manpage). So you can choose either one and get the exact same optimizations. I hope this clears a few things up. Cheers, -- Ben de Groot Gentoo Linux developer (lxde, media, desktop-misc) Gentoo Linux Release Engineering PR liaison __________________________________________________ [EMAIL PROTECTED] http://ben.liveforge.org/ irc://chat.freenode.net/#gentoo-media irc://irc.oftc.net/#lxde __________________________________________________
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