decl.c (decls_match): Allow a redeclaration of a builtin to specify args while the builtin did not.

        * decl.c (decls_match): Allow a redeclaration of a builtin to
        specify args while the builtin did not.

From-SVN: r33195

gcc/cp/ChangeLog

+2000-04-16  Jason Merrill  <jason@casey.cygnus.com>
+
+	* decl.c (decls_match): Allow a redeclaration of a builtin to
+	specify args while the builtin did not.
+
 2000-04-15  Mark Mitchell  <mark@codesourcery.com>
 
 	* cp-tree.def (THUNK_DECL): Add to documentation.

gcc/cp/decl.c

@@ -2936,7 +2936,8 @@ decls_match (newdecl, olddecl)
 
       if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
 	{
-	  if (! strict_prototypes_lang_c && DECL_LANGUAGE (olddecl) == lang_c
+	  if ((! strict_prototypes_lang_c || DECL_BUILT_IN (olddecl))
+	      && DECL_LANGUAGE (olddecl) == lang_c
 	      && p2 == NULL_TREE)
 	    {
 	      types_match = self_promoting_args_p (p1);