kevin diggs <diggskevin38@xxxxxxxxx> writes: > In a similar vein, what is the deal with -march and -mcpu? x86 uses > -march and powerpc uses -mcpu??? All -m options are target dependent. Yes, it would probably be better if all targets used -march, -mtune, and -mcpu consistently. However, the details are complex. For the PowerPC, the actual instruction mnemonics change based on the CPU. It's not clear that it's useful to provide -march which only changes the architecture. Ian