Hello,

I think there's no easy way how to detect compilation mode, you should
check your compiler documentation for predefined macros, maybe there's some
way how to detect the target machine/mode of compilation, but I don't recall
anything like that.

But if you do have control over arm/thumb selection process and compiler
spawning, you can simply add your own -D_ARM_COMPILE_ or -D_THUMB_COMPILE_
macros to compiler command line, and detect those two in your code with
simple #ifdef.

I personally never needed anything like this, because all my thumb code was
stored in "filename.c" files, and arm code in "filename.a.c" files, and my
makefile did detect the .a.c pattern automatically and spawn the compiler
with correct flags to produce arm mode code.

But from your question I think you are trying to do some universal library,
which can be compiled in both ways, so this will probably not help you at
all.

> I am trying to write something like this:
>
> #if (compiled in ARM mode)
> code 1
> #else // compiled in THUMB mode
> code 2
>
> What the (compile in ARM mode) test would be like?
> Can anyone help me?
>
> thanks,
> Vital

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