gcc/testsuite/gcc.dg/c23-unproto-2.c

   1 /* Test compatibility of prototyped function types without arguments and with
   2    variable arguments (C23 made the case of types affected by default argument
   3    promotions compatible, before removing unprototyped functions completely).
   4    Test always-invalid-in-C23 usages, in C23 mode.  */
   5 /* { dg-do compile } */
   6 /* { dg-options "-std=c23 -pedantic-errors" } */
   7
   8 void f1 (); /* { dg-message "previous declaration" } */
   9 void f1 (int, ...); /* { dg-error "conflicting types" } */
  10
  11 void f2 (int, ...); /* { dg-message "previous declaration" } */
  12 void f2 (); /* { dg-error "conflicting types" } */
  13
  14 void f3 (); /* { dg-message "previous declaration" } */
  15 void f3 (char, ...); /* { dg-error "conflicting types" } */
  16
  17 void f4 (char, ...); /* { dg-message "previous declaration" } */
  18 void f4 (); /* { dg-error "conflicting types" } */