[arch-dev-public] x86_64: improving default CFLAGS

Andreas Radke a.radke at arcor.de
Tue Apr 3 17:29:44 EDT 2007

Am Sat, 31 Mar 2007 12:31:20 +0200
schrieb Andreas Radke <a.radke at arcor.de>:

> http://bbs.archlinux.org/viewtopic.php?id=27139
> after some discussions in this thread we want to change our default
> compiler flags. we want to make use of the SSE3 extensions most x86_64
> cpus have.
> to not break backward compatibility for those few early cpus that lack
> SSE3 extensions we want to do it with -mtune. this is how we want to
> set it for the future:
> CFLAGS="-march=x86-64 -mtune=nocona -O2 -pipe"
> CXXFLAGS="-march=x86-64 -mtune=nocona -O2 -pipe"
> some testing is still required. i would like to put a modified version
> of pacman to testing right after it has moved to current. when
> everything is ok we would ask the pacman devs to change it to the
> default makepkg.conf.
> please discuss.
> Andy
> (for i686 are also some speedups possible but that's not my task)
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no opinions? fine to everybody?


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