gcc/testsuite/gcc.dg/c11-unproto-2.c

   1 /* Test compatibility of unprototyped and prototyped function types (C23 made
   2    the case of types affected by default argument promotions compatible, before
   3    removing unprototyped functions completely).  Test always-invalid-in-C23
   4    usages, in C11 mode.  */
   5 /* { dg-do compile } */
   6 /* { dg-options "-std=c11 -pedantic-errors" } */
   7
   8 void f1 (); /* { dg-message "previous declaration" } */
   9 void f1 (int, ...); /* { dg-error "conflicting types" } */
  10 /* { dg-message "ellipsis" "" { target *-*-* } .-1 } */
  11
  12 void f2 (int, ...); /* { dg-message "previous declaration" } */
  13 void f2 (); /* { dg-error "conflicting types" } */
  14 /* { dg-message "ellipsis" "" { target *-*-* } .-1 } */
  15
  16 void f3 (); /* { dg-message "previous declaration" } */
  17 void f3 (char, ...); /* { dg-error "conflicting types" } */
  18 /* { dg-message "ellipsis" "" { target *-*-* } .-1 } */
  19
  20 void f4 (char, ...); /* { dg-message "previous declaration" } */
  21 void f4 (); /* { dg-error "conflicting types" } */
  22 /* { dg-message "ellipsis" "" { target *-*-* } .-1 } */