1  /* { dg-do compile } */
       2  /* { dg-options "-Wundef" } */
       3  #pragma GCC diagnostic ignored "-Wundef"
       4  #if FOO
       5  #endif
       6  #define P _Pragma ("GCC diagnostic push") _Pragma ("GCC diagnostic warning \"-Wundef\"")
       7  P
       8  #if FOO2 /* { dg-warning "is not defined" } */
       9  #endif
      10  #pragma GCC diagnostic pop
      11  #if FOO3
      12  #endif
      13  int i;