Is it possible to update gcc from 4.1 branch for FC6 as well to include
the core2 support. I have a couple of core2 extremes and would like to
see how much difference these make.
The intrinsics are already there and so is MNI support, and while core2 support
has been added only in rawhide (so you can't use -march=core2),
-march=nocona -mmni -mtune=generic is a good enough replacement for -march=core2
and -mtune=core2 is almost identical to -mtune=generic even on GCC trunk.
FYI, rawhide gcc groks both the -mmni and -mssse3 switches, FC6 only -mmni
and GCC trunk only -mssse3.
Whenever FC6 gcc is updated, it will get these changes (they are already
on redhat/gcc-4_1-branch; so there is no point in keeping this bug open), but
there is no firm plan for it, it might take a month or three.