http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61043
--- Comment #3 from Andi Kleen <andi-gcc at firstfloor dot org> --- >Unfortunately, gcc does not allow using SIMD intrinsics if not enabled by >>compiler switches, so leaving the compiler options for a generic target CPU >>wouldn't work. At least that is the case with gcc 4.8. This has been fixed in 4.9
