I just wrote: > > Could also perhaps try -march=auto if you're using a version of GCC > > that supports it.
Oh, it's -march=native. > BTW, is there a possibility to let gcc tell what flags it will actually > use with -march=auto? Paul Hartman just posted a link to a script that seems to do what I was looking for in the "[OT]eee 900a intel atom is what processor family?" thread: <http://www.pixelbeat.org/scripts/gcccpuopt> But it suggests using -march=k8 - isn't that a 64-bit-only thing? I'm not compiling for AMD64, I'm still using 32-bit mode. So I have -march=athlon-xp in my CFLAGS for my AMD Athlon(tm) Dual Core Processor 4850e CPU. Wonko