gcc/testsuite/gcc.dg/wcaselabel-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-w" } */
   3
   4
   5 int foo(int x)
   6 {
   7   switch(x)
   8   {
   9
  10   case 0 % 0:    /* { dg-error "case label does not reduce to an integer constant" } */
  11     return 1;
  12   default:
  13     return 2;
  14   }
  15 }