gcc/testsuite/c-c++-common/cpp/openacc-define-3.c

/* { dg-options "-fopenacc" } */
/* { dg-do preprocess } */
/* { dg-require-effective-target fopenacc } */

#ifndef _OPENACC
# error _OPENACC not defined
#endif

#if _OPENACC != 201711
# error _OPENACC defined to wrong value
#endif