On Thursday 06 July 2006 22:02, Curtis Napier wrote: > Every developer who has ever commented on one of these threads has > always agreed with that. Put it in USE not CLFAGS. Well it's not totally right.
Putting them in CFLAGS, when using -march, is redundant, pure and simple. -march=athlon64 -msse -msse2 -mmmx -m3dnow -m3dnowex would be equivalent of -march=athlon64 If you have a new Athlon64 that supports SSE3, using -march=athlon64 -msse3 is not only legit, but also (in my opinion at least) suggested. GCC can improve heavily if it knows what it has to do. The problem is that people think that using -march=pentium3 -mmmx will bring them more acceleration, while this isn't true. So I would suggest anybody wanting to comment on these issue to know the difference of using mmx in useflag and -mmmx in CFLAGS at the moment. And then evaluate the change in behaviour. Note: -march=i586 -mmmx for Pentium (classic) MMX is a good idea most of the times, as it's not an i686 but at the same time it has MMX support. -- Diego "Flameeyes" Pettenò - http://farragut.flameeyes.is-a-geek.org/ Gentoo/Alt lead, Gentoo/FreeBSD, Video, AMD64, Sound, PAM, KDE
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