gcc/testsuite/gcc.dg/c90-func-1.c

   1 /* Test that we diagnose the __func__ predefined identifier in
   2    C90 pedantic mode.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   5
   6 void
   7 foo (void)
   8 {
   9   const char *s = __func__; /* { dg-error " ISO C90 does not support .__func__. predefined identifier" } */
  10 }