llvm dev - Jan 2010 - [LLVMdev] building a llvm-arm-elf crosscompiler on OSX 10.5

Dear Anton,

Thanks for your help!
I had a look to llvm (2.6) configure options but I couldn't find any
way to specify cpu type, fpu ecc..Could you please give me any
indication and/or example? I want to try llvm with Atmel's
AT91SAM7X256 (core is  ARM7TDMI )

Thank you again,

pz

2010/1/9 Anton Korobeynikov <anton at
korobeynikov.info>:
> Hello
>
>> But I got the followings errors:
>>
>> /var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccDFjySd.s:
>> Assembler messages:
>> /var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccDFjySd.s:96:
> Correct. You haven't specified any ARM specific stuff during llvm-gcc
> conffigure (cpu type, fpu type, floating point abi, etc). This means
> that default will be used. LLVM defaults to something like ARMv5,
> binutils - to ARMv4. So, you just need to configure llvm-gcc properly.
>
> Keep in mind, that binutils for ARM are known to be buggy, you need to
> use binutils CVS snapshot (and even this is buggy - some bugs are not
> yet fixed there).
>
> --
> With best regards, Anton Korobeynikov
> Faculty of Mathematics and Mechanics, Saint Petersburg State University
>

Hello, Pazzo
> I had a look to llvm (2.6) configure options but I couldn't find any
> way to specify cpu type, fpu ecc..
These are not llvm configure options, but gcc's one. Basically, you
should configure llvm-gcc in the same way you do for gcc for your
platform.
> Could you please give me any
> indication and/or example? I want to try llvm with Atmel's
> AT91SAM7X256 (core is  ARM7TDMI )
I think adding --with-cpu=arm7tdmi to llvm-gcc configure should work

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University

Dear Anton,

Thank you again for your help!

I tried with the following options (adding --with-cpu=arm7tdmi and
using binutils from cvs snapshot):

../llvm-gcc4.2-2.6.source/configure
--prefix=/usr/local/cross-llvm-gcc-arm-elf-4.2-2.6
--program-prefix=llvm-
--enable-llvm=/Users/dummy/Develop/llvm/llvm-build
--enable-languages=c,c++ --host=i686-apple-darwin9
--build=i686-apple-darwin9 --target=arm-elf --with-cpu=arm7tdmi
--with-gxx-include-dir=/usr/include/c++/4.0.0 --enable-interwork
--enable-multilib --with-newlib
--with-header=../newlib-1.18.0/newlib/libc/include


...but after a while I got same errors:

/Users/dummy/Develop/llvm/llvm-gcc-build/./gcc/xgcc
-B/Users/dummy/Develop/llvm/llvm-gcc-build/./gcc/
-B/usr/local/cross-llvm-gcc-arm-elf-4.2-2.6/arm-elf/bin/
-B/usr/local/cross-llvm-gcc-arm-elf-4.2-2.6/arm-elf/lib/ -isystem
/usr/local/cross-llvm-gcc-arm-elf-4.2-2.6/arm-elf/include -isystem
/usr/local/cross-llvm-gcc-arm-elf-4.2-2.6/arm-elf/sys-include  -O2
-O2 -g -O2  -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE   -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition  -isystem ./include  -fno-inline -g
-DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -I. -I.
-I../../llvm-gcc4.2-2.6.source/gcc
-I../../llvm-gcc4.2-2.6.source/gcc/.
-I../../llvm-gcc4.2-2.6.source/gcc/../include -I./../intl
-I../../llvm-gcc4.2-2.6.source/gcc/../libcpp/include
-I../../llvm-gcc4.2-2.6.source/gcc/../libdecnumber -I../libdecnumber
-I/Users/dummy/Develop/llvm/llvm-build/include
-I/Users/dummy/Develop/llvm/llvm-2.6/include -mthumb  -fexceptions -c
../../llvm-gcc4.2-2.6.source/gcc/unwind-dw2-fde.c -o
libgcc/thumb/unwind-dw2-fde.o
/var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccEIiJQ4.s:
Assembler messages:
/var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccEIiJQ4.s:96:
Error: selected processor does not support `sxtb r5,r5'
/var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccEIiJQ4.s:537:
Error: selected processor does not support `sxtb r6,r6'
/var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccEIiJQ4.s:705:
Error: selected processor does not support `sxtb r1,r1'
/var/folders/7f/7fiRIEm-FruFfT7mGbk3uk+++TI/-Tmp-//ccEIiJQ4.s:711:
Error: selected processor does not support `sxtb r1,r1'
make[3]: *** [libgcc/thumb/unwind-dw2-fde.o] Error 1
make[2]: *** [stmp-multilib] Error 2
make[1]: *** [all-gcc] Error 2
make: *** [all] Error 2

Any clue?

Thank in advance for help.

pz