gcc/testsuite/gcc.dg/cpp/pragma-diagnostic-2.c

   1 /*
   2   { dg-options "-Wuninitialized -ftrack-macro-expansion=2" }
   3   { dg-do compile }
   4 */
   5
   6 void f (unsigned);
   7
   8 #define CODE_WITH_WARNING \
   9   int a; /* { dg-message "was declared here" } */        \
  10   f (a)  /* { dg-warning "used uninitialized" } */
  11
  12 #pragma GCC diagnostic ignored "-Wuninitialized"
  13
  14 void
  15 g (void)
  16 {
  17   CODE_WITH_WARNING;
  18 }
  19
  20 #pragma GCC diagnostic push
  21
  22 #pragma GCC diagnostic error "-Wuninitialized"
  23
  24 void
  25 h (void)
  26 {
  27   CODE_WITH_WARNING; /* { dg-message "in expansion of macro 'CODE_WITH_WARNING'" } */
  28 }