gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch.c

   1 /* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
   2    without prototype
   3    { dg-do compile }
   4    { dg-options "-Wall" } */
   5
   6 typedef __SIZE_TYPE__ size_t;
   7
   8 /* Verify that ordinary library built-ins are not diagnosed with -Wall
   9    (or by default) whether or not they take arguments (even though they
  10    should be).  */
  11
  12 void abort ();
  13 void* memcpy ();
  14 void* memset ();
  15 size_t strlen ();
  16
  17 /* Verify mismatches in return types are diagnosed.  */
  18 int exit ();        /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */
  19
  20 /* Variadic built-ins are diagnosed with -Wall (they are, in fact,
  21    diagnosed by default).  */
  22 int printf ();      /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */
  23 int sprintf ();     /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */