Re: [arm-gnu] RE: illegal instruction ARMv7 on omap3evm, with -mthumb option

[Mark Mitchell <mark@xxxxxxxxxxxxxxxx>]

Stuart Waugh wrote:

>> It generates Thumb-2 code if you specify -march=armv7-a and -mthumb.
>> It never generates ARM mode code if you specify -mthumb.
> 
> Does that mean it generates only ARM if I do not specify -mthumb?

Yes.

> Without that option, why do I still see when I run readelf on the generated executable
>     TAG_THUMB_ISA_use: Thumb-2 ?

You are probably linking in at least one Thumb-2 object file, perhaps
something from one of the run-time libraries.

-- 
Mark Mitchell
CodeSourcery
mark@xxxxxxxxxxxxxxxx
(650) 331-3385 x713