[LLVMdev] llvm-gcc cross compiler for ARM Linux failing

[Neel Nagar]

I suspect that my llvm-gcc cross compiler  is using the wrong
assembler because it does not recognize "-mcpu=cortex-a8".

I was trying to build a cross compiler for a Mac host. Now I am trying
to build on x86_64 Linux. I am targeting a Beagle board with an ARM
Cortex-A8 and Angstrom Linux.

TRIED: to use the script in llvm/utils/crosstool/ARM/build-install-linux.sh
I used the recommended version of CodeSourcery and the same SVN revision.

RESULT: llvm-gcc builds but when I try to use it I get "as:
unrecognized option `-meabi=4'"

TRIED: using the latest CodeSourcery 2009q1 and latest LLVM REV 74564

RESULT: llvm-gcc failed to build with this error:

   /tmp/ccVSwC0h.s:535: Error: selected processor does not support
`strd r2,[r6]'
   make[3]: *** [libgcc/./_udivmoddi4.o] Error 1

TRIED: adding --with-cpu=cortex-a8    to configuration for llvm-gcc

RESULT: llvm-gcc now builds but when I try to use it I get "as:
unrecognized option `-mcpu=cortex-a8'"

I suspect it is using the wrong assembler. But when I do llvm-gcc -v I
can see it has:

  --with-gnu-as=/home/neel/CodeSourcery/Sourcery_G++_Lite/bin/arm-none-linux-gnueabi-as

If I use that assembler directly I get an executable but  printf,
fflush and others are UNDefined.

I can compile programs using the CodeSourcery gcc toolchain just fine.
I did not even have to install the runtime code on the Beagle Board.
it just worked.

Any suggestions?

Has anyone recently built an LLVM cross compiler for ARM Linux?

Thanks,
Neel