ARM iwmmxt CFLAGS

[Matt Turner]

Hi,

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?

Also, do I need to do anything with -mabi=iwmmxt? I think not, but..

Thanks,
Matt

http://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html