Matt Turner <mattst88@xxxxxxxxx> writes: > I'm a bit confused about how CFLAGS related to ARM's iwmmxt > instruction set extensions are handled. > > On x86 to enable SSEx instructions, one would do something like > -march=... -msse3, but on ARM I must do something like -march=iwmmxt > (where I'd have expected -march=armv7 -miwmmxt). > > What flags would I use to optimize code for armv7 while enabling > iwmmxt instructions? -march=armv7 -mcpu=iwmmxt? I think -march=iwmmxt -mtune=armv7. I agree that this seems a bit odd. > Also, do I need to do anything with -mabi=iwmmxt? I think not, but.. I don't know. Ian
