Linking with OpenMP support

I’m trying to compile and link an x86 assembly file with OpenMP calls using llvm-gcc 4.2.1 and I get the following errors:

/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(team.o): In function gomp_team_start': (.text+0x15a): undefined reference to __sync_bool_compare_and_swap_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(team.o): In function gomp_team_start': (.text+0x192): undefined reference to __sync_lock_test_and_set_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(team.o): In function gomp_team_start': (.text+0x31f): undefined reference to __sync_bool_compare_and_swap_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(team.o): In function gomp_team_start': (.text+0x357): undefined reference to __sync_lock_test_and_set_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(team.o): In function gomp_team_end': (.text+0x48d): undefined reference to __sync_bool_compare_and_swap_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(mutex.o): In function gomp_mutex_lock_slow': (.text+0x20): undefined reference to __sync_val_compare_and_swap_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(mutex.o): In function gomp_mutex_lock_slow': (.text+0x4e): undefined reference to __sync_bool_compare_and_swap_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(bar.o): In function gomp_barrier_wait_end': (.text+0x2e): undefined reference to __sync_lock_test_and_set_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(bar.o): In function gomp_barrier_wait_end': (.text+0x6c): undefined reference to __sync_add_and_fetch_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(bar.o): In function gomp_barrier_wait_end': (.text+0x83): undefined reference to __sync_lock_test_and_set_4’
/afs/cs.wisc.edu/p/vertical/tools/llvm-gcc-4.2/bin/…/lib/gcc/i686-pc-linux-gnu/4.2.1/…/…/…/libgomp.a(bar.o): In function gomp_barrier_wait': (.text+0xde): undefined reference to __sync_bool_compare_and_swap_4’
collect2: ld returned 1 exit status

I don’t get this problem when using gcc 4.2.1. I this not supported then? Any ideas?

Marc