1  /* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
       2     without prototype
       3     { dg-do compile }
       4     { dg-options "-Wall -Wextra" } */
       5  
       6  typedef __SIZE_TYPE__ size_t;
       7  
       8  /* Verify that ordinary library built-ins are not diagnosed with -Wextra
       9     when they take no arguments (except in cases of return type mismatches).
      10     This is in anticipation that C may some day adopt the same syntax as
      11     C++ for declaring functions that take no arguments.  */
      12  
      13  void abort ();
      14  
      15  /* Verify that ordinary library built-ins are diagnosed with -Wextra
      16     when they take arguments.  */
      17  
      18  void* memcpy ();    /* { dg-warning "declaration of built-in function .memcpy. without a prototype; expected .void \\\*\\\(void \\\*, const void \\\*, \(long \)*unsigned int\\\)." } */
      19  void* memset ();    /* { dg-warning "declaration of built-in function .memset. without a prototype; expected .void \\\*\\\(void \\\*, int, *\(long \)*unsigned int\\\)." } */
      20  size_t strlen ();   /* { dg-warning "declaration of built-in function .strlen. without a prototype; expected .\(long \)*unsigned int\\\(const char \\\*\\\)." } */
      21  
      22  /* Variadic built-ins are diagnosed even without -Wextra (they are,
      23     in fact, diagnosed by default).  */
      24  int printf ();      /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */
      25  int sprintf ();     /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */