[arm-gnu] Detecting M-profile target from C-preprocessor?

[Christophe LYON <christophe.lyon@xxxxxx>]

Hello,

I'd like to have some assembly source file pre-processed by cpp, and 
this asm code needs to be different for M-profile targets.

Is there any #define to help this?

__thumb__ and __thumb__2 are defined when -mthumb is used, but even when 
defined non-M-profile targets support ARM code, so an asm file can emit 
ARM code even when __thumb__ or __thumb2__ are defined.

I couldn't find a simple of detecting that ARM code isn't supported by 
the target.

Any hint?

Thanks.

Christophe.