extern bool c_promoting_integer_type_p (const_tree);
extern int self_promoting_args_p (const_tree);
extern tree strip_array_types (tree);
-extern const_tree const_strip_array_types (const_tree);
extern tree strip_pointer_operator (tree);
extern tree strip_pointer_or_array_types (tree);
extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);