assembler error arm-elf-gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm ("unknown pseudo-op: `.syntax'" and more)

[Steffen Dettmer <steffen dot dettmer at googlemail dot com>]

Hi,

while trying to build arm-elf-gcc-4.6.0 I get assembler errors
in thumb/libgcc. I'm having a hard time finding out how to build gcc
correctly and don't know what I did wrong, any hints appreciated.

here the end of make output:

make[4]: Entering directory
`/usr/local/build/gcc/gcc-4.6.0-arm/arm-elf/thumb/libgcc'
# If this is the top-level multilib, build all the other
# multilibs.
/usr/local/build/gcc/gcc-4.6.0-arm/./gcc/xgcc
-B/usr/local/build/gcc/gcc-4.6.0-arm/./gcc/
-B/usr/local/exp/gcc-4.6.0/arm-elf/bin/
-B/usr/local/exp/gcc-4.6.0/arm-elf/lib/ -isystem
/usr/local/exp/gcc-4.6.0/arm-elf/include -isystem
/usr/local/exp/gcc-4.6.0/arm-elf/sys-include    -g -Os -mthumb -O2  -g
-Os -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition  -isystem ./include  -fno-inline
-Wno-missing-prototypes -g  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED
-fno-stack-protector   -I. -I. -I../../.././gcc
-I../../../../gcc-4.6.0/libgcc -I../../../../gcc-4.6.0/libgcc/.
-I../../../../gcc-4.6.0/libgcc/../gcc
-I../../../../gcc-4.6.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS
-o _thumb1_case_sqi.o -MT _thumb1_case_sqi.o -MD -MP -MF
_thumb1_case_sqi.dep -DL_thumb1_case_sqi -xassembler-with-cpp \
  -c ../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm
../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm:
Assembler messages:
../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm:1725:
Error: unknown pseudo-op: `.syntax'
../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm:1729:
Error: bad instruction `lsrs r1,r1,#1'
../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm:1730:
Error: bad instruction `lsls r1,r1,#1'
../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm:1732:
Error: bad instruction `lsls r1,r1,#1'
make[4]: *** [_thumb1_case_sqi.o] Error 1
make[4]: Leaving directory
`/usr/local/build/gcc/gcc-4.6.0-arm/arm-elf/thumb/libgcc'
make[3]: *** [multi-do] Error 1
make[3]: Leaving directory `/usr/local/build/gcc/gcc-4.6.0-arm/arm-elf/libgcc'
make[2]: *** [all-multi] Error 2
make[2]: Leaving directory `/usr/local/build/gcc/gcc-4.6.0-arm/arm-elf/libgcc'
make[1]: *** [all-target-libgcc] Error 2
make[1]: Leaving directory `/usr/local/build/gcc/gcc-4.6.0-arm'
make: *** [all] Error 2

Google found that it could be using a wrong as, but I get the
same error with my old installed version:

arm-elf-gcc-3.4.3 -isystem /usr/local/exp/gcc-4.6.0/arm-elf/include
-isystem /usr/local/exp/gcc-4.6.0/arm-elf/sys-include    -g -Os
-mthumb -O2  -g -Os -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition  -isystem ./include  -fno-inline
-Wno-missing-prototypes -g  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I.
-I. -I../../.././gcc -I../../../../gcc-4.6.0/libgcc
-I../../../../gcc-4.6.0/libgcc/. -I../../../../gcc-4.6.0/libgcc/../gcc
-I../../../../gcc-4.6.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS
-o _thumb1_case_sqi.o -MT _thumb1_case_sqi.o -MD -MP -MF
_thumb1_case_sqi.dep -DL_thumb1_case_sqi -xassembler-with-cpp   -c
../../../../gcc-4.6.0/libgcc/../gcc/config/arm/lib1funcs.asm

leads to literally the same error messages from the assembler.


I did:
# At first we build only the cross compiler without any libraries.
# To enable Thumb interworking, you need to edit
# gcc-4.4.1/gcc/config/arm/t-arm-elf. Uncomment the following
# lines:
#
# MULTILIB_OPTIONS     += mlittle-endian/mbig-endian
# MULTILIB_DIRNAMES    += le be
# MULTILIB_MATCHES     += mbig-endian=mbe mlittle-endian=mle
#
# MULTILIB_OPTIONS    += mhard-float/msoft-float
# MULTILIB_DIRNAMES   += fpu soft
# MULTILIB_EXCEPTIONS += *mthumb/*mhard-float*
#
# MULTILIB_OPTIONS    += mno-thumb-interwork/mthumb-interwork
# MULTILIB_DIRNAMES   += normal interwork
#


and configured:

../gcc-4.6.0/configure \
  --prefix=/usr/local/exp/gcc-4.6.0/ \
  --enable-languages=c,c++ \
  --target=arm-elf \
  --program-prefix=arm-elf \
  --with-sysroot=/usr/local/build/gcc/sysroot/ \
  --enable-interwork --enable-multilib \
  --enable-target-optspace --with-float=soft \
  --with-zlib=no


what did I wrong and how do I continue?

I found several HOWTOs for building for ARM target, but I'm afraid no
comprehensive one.
Which documentation I should follow?

Any hints and pointers appreciated!

oki,

Steffen