https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70934
Bug ID: 70934
Summary: 16-byte atomics are unimplemented on s390x, but
__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 is defined
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: koriakin at 0x04 dot net
Target Milestone: ---
$ cat at128.c
typedef int ti __attribute__((mode(TI)));
ti a, b, c;
int main(void) {
#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
__sync_val_compare_and_swap(&a, b, c);
#endif
}
$ gcc at128.c
/tmp/cc1ezNAw.o: In function `main':
at128.c:(.text+0x66): undefined reference to `__sync_val_compare_and_swap_16'
collect2: error: ld returned 1 exit status
