On Wed, Apr 20, 2011 at 3:32 PM, Adam Jackson <ajax(a)redhat.com> wrote:
The least capable processor we've gone out of our way to fix
things for is
the AMD Geode GX, which has MMX and 3DNow, but is also slightly less than a
proper Pentium Pro in that it doesn't have nopl or cmov.
However, rpm sets --march=i686, which implies only Pentium Pro and does not
imply MMX or anything newer. Not that I know of anyone who's tried running
Fedora on a bare i686 in recent memory.
OK, that's fine. I'll compile without any of the fancy vector
instructions for i686, then explicitly pass an -march arg of my own (I
see some other packages use -march=pentium4) for the version that will
live in /usr/lib/sse2. For x86_64, I'll make sure that SSE3 and SSSE3
support is off and let it do its thing otherwise.
Thanks, Ajax!
--
Jerry James
http://www.jamezone.org/