Matt wrote: > When -mmmx and -msse are added to the flags, it says that -mmmx -mno-mmx > and -msse -mno-sse are enabled. GCC 3.2.2 running gcc -v -Q empty.c > -march=pentium3 -mmmx -msse Please see http://gcc.gnu.org/bugs.html for how to report bugs. This is fixed in gcc-3.3 and later. Jim