1  /* { dg-options "-Wunused-variable" } */
       2  
       3  /* Verify that ignoring -Wunused-variable works, for various placements
       4     of the variable and the _Pragma.  */
       5  
       6  /* Test 1: the _Pragma is in a macro, but the affected code isn't.  */
       7  
       8  #pragma GCC diagnostic push
       9  
      10  #define MACRO_1 \
      11      _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
      12  
      13  int test_1()
      14  {
      15      _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
      16      int x;
      17      return 0;
      18  }
      19  #pragma GCC diagnostic pop
      20  
      21  
      22  /* Test 2: neither the _Pragma nor the affected code are in a macro.  */
      23  
      24  #pragma GCC diagnostic push
      25  int test_2()
      26  {
      27      _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
      28      int x;
      29      return 0;
      30  }
      31  #pragma GCC diagnostic pop
      32  
      33  
      34  /* Test 3: the _Pragma isn't in a macro, but the affected code is.  */
      35  
      36  #define MACRO_3 \
      37      int x;
      38  
      39  #pragma GCC diagnostic push
      40  int test_3()
      41  {
      42      _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
      43      MACRO_3
      44      return 0;
      45  }
      46  #pragma GCC diagnostic pop
      47  
      48  
      49  /* Test 4: the _Pragma and the affected code are in different macros.  */
      50  
      51  #pragma GCC diagnostic push
      52  #define MACRO_4A \
      53      _Pragma("GCC diagnostic ignored \"-Wunused-variable\"")
      54  
      55  #define MACRO_4B \
      56      int x;
      57  
      58  int test_4()
      59  {
      60      MACRO_4A;
      61      MACRO_4B
      62      return 0;
      63  }
      64  #pragma GCC diagnostic pop
      65  
      66  
      67  /* Test 5: both the _Pragma and the affected code are in the same macro.  */
      68  
      69  #pragma GCC diagnostic push
      70  #define MACRO_5 \
      71      _Pragma("GCC diagnostic ignored \"-Wunused-variable\"") \
      72      int x;
      73  
      74  int test_5()
      75  {
      76      MACRO_5;
      77      return 0;
      78  }
      79  #pragma GCC diagnostic pop