OPAL_BUILTIN_C11   61 opal/include/opal/sys/atomic.h #if OPAL_ASSEMBLY_BUILTIN == OPAL_BUILTIN_C11
OPAL_BUILTIN_C11   17 opal/include/opal_stdatomic.h #if OPAL_ASSEMBLY_BUILTIN != OPAL_BUILTIN_C11