> > The -msse3 flag is only used for the low-level code, there should be no > > conflict; if SSE3 is not supported this code is never called. > > Sure. You just have to be very careful to restrict -msse3 to SSE3-only > code. While I am at it I can't seem to compile with -msse3 only, somehow I need -march=core2 or -march=atom. If anyone has example flags for SSE3 I am all ears. Thanks, -Pierre