http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52110
--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-03-12 06:46:41 UTC --- > Build is successful with pragma Volatile in lieu of the Atomic. > However, test results appear similar: > http://gcc.gnu.org/ml/gcc-testresults/2012-03/msg01197.html OK, let's use pragma Volatile anyway, it's the closest approximation we have.