gcc/testsuite/gcc.dg/20031012-1.c

   1 /* { dg-options "-Waddress" } */
   2 /* Origin: Andrew Morton <akpm@osdl.org> */
   3 /* Warn if a function address of a non-weak function is used
   4    as a truth value.  */
   5 /* See thread starting at http://gcc.gnu.org/ml/gcc/2003-10/msg00414.html  */
   6
   7 void foo(void)
   8 {}
   9
  10 void bar(void)
  11 {}
  12
  13 int main() {
  14         if (foo) /* { dg-warning "" } */
  15                 bar();
  16         return 0;
  17 }
  18