File Wunprototyped-calls.diff of Package gcc43

Index: gcc/c.opt
===================================================================
*** gcc/c.opt	(revision 131759)
--- gcc/c.opt	(working copy)
*************** Wunknown-pragmas
*** 457,462 ****
--- 457,466 ----
  C ObjC C++ ObjC++ Warning
  Warn about unrecognized pragmas
  
+ Wunprototyped-calls
+ C Var(warn_unprototyped_calls) Warning
+ Warn about calls to unprototyped functions with at least one argument
+ 
  Wunused-macros
  C ObjC C++ ObjC++ Warning
  Warn about macros defined in the main file that are not used
Index: gcc/c-opts.c
===================================================================
*** gcc/c-opts.c	(revision 131759)
--- gcc/c-opts.c	(working copy)
*************** c_common_handle_option (size_t scode, co
*** 419,427 ****
  	warn_uninitialized = (value ? 2 : 0);
  
        if (!c_dialect_cxx ())
! 	/* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
! 	   can turn it off only if it's not explicit.  */
! 	warn_main = value * 2;
        else
  	{
  	  /* C++-specific warnings.  */
--- 419,430 ----
  	warn_uninitialized = (value ? 2 : 0);
  
        if (!c_dialect_cxx ())
! 	{
! 	  /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
! 	     can turn it off only if it's not explicit.  */
! 	  warn_main = value * 2;
! 	  warn_unprototyped_calls = 1;
! 	}
        else
  	{
  	  /* C++-specific warnings.  */
Index: gcc/testsuite/gcc.dg/cleanup-1.c
===================================================================
*** gcc/testsuite/gcc.dg/cleanup-1.c	(revision 131821)
--- gcc/testsuite/gcc.dg/cleanup-1.c	(working copy)
***************
*** 6,12 ****
  #define C(x)	__attribute__((cleanup(x)))
  
  static int f1(void *x U) { return 0; }
! static void f2() { }
  static void f3(void) { }
  static void f4(void *x U) { }
  static void f5(int *x U) { }
--- 6,12 ----
  #define C(x)	__attribute__((cleanup(x)))
  
  static int f1(void *x U) { return 0; }
! static void f2() { }	/* { dg-message "declared here" "" } */
  static void f3(void) { }
  static void f4(void *x U) { }
  static void f5(int *x U) { }
*************** static void f9(int x U) { }
*** 18,24 ****
  void test(void)
  {
    int o1 C(f1);
!   int o2 C(f2);
    int o3 C(f3);		/* { dg-error "too many arguments" } */
    int o4 C(f4);
    int o5 C(f5);
--- 18,24 ----
  void test(void)
  {
    int o1 C(f1);
!   int o2 C(f2);		/* { dg-warning "without a real prototype" } */
    int o3 C(f3);		/* { dg-error "too many arguments" } */
    int o4 C(f4);
    int o5 C(f5);
Index: gcc/c-typeck.c
===================================================================
*** gcc/c-typeck.c	(revision 133807)
--- gcc/c-typeck.c	(working copy)
*************** build_function_call (tree function, tree
*** 2444,2449 ****
--- 2444,2461 ----
    if (nargs < 0)
      return error_mark_node;
  
+   /* If we cannot check function arguments because a prototype is
+      missing for the callee, warn here.  */
+   if (warn_unprototyped_calls
+       && nargs > 0 && !TYPE_ARG_TYPES (fntype)
+       && fundecl && !DECL_BUILT_IN (fundecl) && !C_DECL_IMPLICIT (fundecl)
+       && !DECL_ARGUMENTS (fundecl))
+     {
+       warning (OPT_Wunprototyped_calls,
+ 	       "call to function %qD without a real prototype", fundecl);
+       inform ("%J%qD was declared here", fundecl, fundecl);
+     }
+ 
    /* Check that the arguments to the function are valid.  */
  
    check_function_arguments (TYPE_ATTRIBUTES (fntype), nargs, argarray,