[cfe-commits] [Patch] Make Thumb triples force Thumb mode

[salvatore benedetto]

On Wed, Jul 25, 2012 at 5:48 PM, Renato Golin <rengolin at systemcall.org> wrote:
> On 25 July 2012 14:59, salvatore benedetto
> <salvatore.benedetto at gmail.com> wrote:
>> Hmmm, I hope I'm not doing anything wrong on my side, but I've just
>> applied your patch,
>> recompile and test it on my host system (linux) and it still produces armv5te.
>
> armv57e you mean Thumb or ARM code?

$ arm-none-linux-gnueabi-readelf -A testReference.o
Attribute Section: aeabi
File Attributes
  Tag_CPU_name: "5TE"
  Tag_CPU_arch: v5TE
  Tag_ARM_ISA_use: Yes
  Tag_THUMB_ISA_use: Thumb-1
  Tag_ABI_FP_denormal: Needed
  Tag_ABI_FP_exceptions: Needed
  Tag_ABI_FP_number_model: IEEE 754
  Tag_ABI_align_needed: 8-byte
  Tag_ABI_align_preserved: 8-byte, except leaf SP
  Tag_DIV_use: Not allowed

which is the result I had before applying your patch.

http://permalink.gmane.org/gmane.comp.compilers.llvm.devel/52030

And unfortunately applying the -mthumb -march=cortex-m3 as I used to,
now gives me an error.

clang++ -ccc-host-triple thumbv7-none-eabi  -ccc-gcc-name
arm-none-linux-gnueabi-g++  testReference.cpp -c -mthumb
-mcpu=cortex-m3
fatal error: error in backend: CPU: 'cortex-m3' does not support ARM
mode execution!

S.