+extern tree default_cxx_get_cookie_size (tree);
+
+extern bool hook_pass_by_reference_must_pass_in_stack
+ (CUMULATIVE_ARGS *, enum machine_mode mode, tree, bool);
+extern bool hook_callee_copies_named
+ (CUMULATIVE_ARGS *ca, enum machine_mode, tree, bool);
+
+extern void default_unwind_emit (FILE *, rtx);
+
+extern bool default_scalar_mode_supported_p (enum machine_mode);
+extern bool default_decimal_float_supported_p (void);
+
+extern const char * default_invalid_within_doloop (rtx);
+
+extern bool default_narrow_bitfield (void);
+
+extern tree default_builtin_vectorized_function (enum built_in_function, tree, tree);
+
+extern tree default_builtin_vectorized_conversion (enum tree_code, tree);
+
+/* These are here, and not in hooks.[ch], because not all users of
+ hooks.h include tm.h, and thus we don't have CUMULATIVE_ARGS. */
+
+extern bool hook_bool_CUMULATIVE_ARGS_false (CUMULATIVE_ARGS *);
+extern bool hook_bool_CUMULATIVE_ARGS_true (CUMULATIVE_ARGS *);
+
+extern bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false
+ (CUMULATIVE_ARGS *, enum machine_mode, tree, bool);
+extern bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true
+ (CUMULATIVE_ARGS *, enum machine_mode, tree, bool);
+extern int hook_int_CUMULATIVE_ARGS_mode_tree_bool_0
+ (CUMULATIVE_ARGS *, enum machine_mode, tree, bool);
+extern const char *hook_invalid_arg_for_unprototyped_fn
+ (tree, tree, tree);
+extern bool hook_bool_rtx_commutative_p (rtx, int);
+extern rtx default_function_value (tree, tree, bool);
+extern rtx default_internal_arg_pointer (void);
+extern enum reg_class default_secondary_reload (bool, rtx, enum reg_class,
+ enum machine_mode,
+ secondary_reload_info *);
+extern void hook_void_bitmap (bitmap);
+extern bool default_handle_c_option (size_t, const char *, int);
+extern int default_reloc_rw_mask (void);