On 06/29/2010 06:08 PM, Hasan SAHIN wrote: > I have read the safe flags document and it says that : > > /GCC 4.2 introduces a new -march option, -march=*native*, which > automatically detects the features your CPU supports and sets the > options appropriately. If you have an Intel or AMD CPU and are using >>=sys-devel/gcc-4.2.3, using -march=native is recommended. Do *not* use > -march=native if you use distcc on nodes with different architectures as > this may produce unusable code. / > > which I understood, I can use the -march=native option instead of > > CFLAGS="-march=k8-msse3 -O2 -pipe -fomit-frame-pointer" > > is it true?
Yes, -march=native is a good, simple way to optimize your compiles. Here's what you should use on your Athlon64 X2, then: CFLAGS="-march=native -O2 -pipe"
