Ryan Hill <dirtyepic@xxxxxxxxxx> writes: > Are -march options expected to override any relevant options specified > previously on the command line? No. -march should only override previous -march options. Doing anything else is complicated and error-prone. That said, I think it would be reasonable if the compiler issued warnings about incompatible options after all options have been parsed. > It appears in GCC-4.2.0 that SSE movss > instructions will be generated when for example the following code is compiled > with -msse -march=athlon: Don't do that, then. Ian
