gcc/testsuite/gcc.dg/redecl-5.c

   1 /* Test for multiple declarations and composite types.  Diagnosis of
   2    incompatible implicit declaration.  */
   3 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
   4 /* { dg-do compile } */
   5 /* { dg-options "-std=c89" } */
   6
   7 void
   8 f (void)
   9 {
  10   long z(); /* { dg-message "note: previous implicit declaration" } */
  11 }
  12
  13 void
  14 g (void)
  15 {
  16   z(); /* { dg-error "incompatible" } */
  17   labs(1); /* { dg-warning "incompatible" } */
  18   printf("x"); /* { dg-warning "incompatible" } */
  19 }