Hi Kevin, I think your code is correct, and the GCC 4.1 compiler has a boo-boo. File a bug report, please, including the code snippet that reproduces the suspected bug, what platform, and the command line used to compile the code. See "Bugs" section on the left column of <http://gcc.gnu.org/>. Anyway, here's a couple bits of tid (as I understand it): -O0 disables all optimizations. The -fenable-something likely don't enable the specified optimization when -O0 is specified (if there are exceptions, I'm not aware of them). -fverbose-asm (with -S or -save-temps) is useful to ascertain what optimizations are happenings with -O1, -O2, -O3, -Os. As I understand it, only select optimizations are twiddlible with -f flags, but not all of the possible optimizations. HTH, --Eljay PS: twiddlible ... *heh*
