[Bug libgomp/65467] New: [libgomp] sorry, unimplemented: '_Atomic' with OpenMP

[sebastian.huber@embedded-brains.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65467

            Bug ID: 65467
           Summary: [libgomp] sorry, unimplemented: '_Atomic' with OpenMP
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgomp
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sebastian.huber@embedded-brains.de
                CC: jakub at gcc dot gnu.org

It seems that <stdatomic.h> is not available with -fopenmp:

stdatomic.h:40:1: sorry, unimplemented: '_Atomic' with OpenMP
 typedef _Atomic _Bool atomic_bool;

Is this a principal problem with the OpenMP standard or libgomp?

The __atomic built-ins seem to work, e.g.

int f(int *a, int b)
{
  return __atomic_fetch_add(a, b, 0);
}