gcc/testsuite/gcc.dg/transparent-union-2.c

   1 /* PR c/20043 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=gnu99" } */
   4
   5 typedef union { int *i; long *l; } U
   6   __attribute__((transparent_union));
   7
   8 extern void f0 (U);             /* { dg-message "note: previous declaration" } */
   9 extern void f0 (void *);        /* { dg-error "conflicting types" } */
  10
  11 extern void f1 (U);             /* { dg-message "note: previous declaration" } */
  12 extern void f1 (unsigned long); /* { dg-error "conflicting types" } */
  13
  14 extern void f2 (void *);        /* { dg-message "note: previous declaration" } */
  15 extern void f2 (U);             /* { dg-error "conflicting types" } */
  16
  17 extern void f3 (unsigned long); /* { dg-message "note: previous declaration" } */
  18 extern void f3 (U);             /* { dg-error "conflicting types" } */