On Sun, Apr 24, 2005 at 03:02:20PM -0400, sean wrote: > On fc4t am64, I've set rpmopts as: > > optflags: x86_64 -O3 -fPIC -ffast-math -fomit-frame-pointer > -funit-at-a-time -mtune=athlon64 -ftree-vectorize > -fvisibility-inlines-hidden And the reason for that magic choice is? E.g. x86-64 has -fomit-frame-pointer by default, -funit-at-a-time is also the default for -O2 and above. Building all code PIC is a de-optimization (although on x86-64 not a major one,the PIC cost is not as high on x86-64 as on other arches), -O3 is for the vast majority of code worse than -O2 as well. -mtune=athlon64 is on by default too. > Now -fvisibility-inlines-hidden is only for g++. It > generates a warning mesage for gcc. Is there a way of > setting the CFLAGS differently from CXXFLAGS? You'd need to hack up %configure macro etc. Jakub
