+extern void hook_void_bitmap (bitmap);
+extern bool default_handle_c_option (size_t, const char *, int);
+extern int default_reloc_rw_mask (void);
+extern tree default_mangle_decl_assembler_name (tree, tree);
+extern tree default_emutls_var_fields (tree, tree *);
+extern tree default_emutls_var_init (tree, tree, tree);
+extern bool default_hard_regno_scratch_ok (unsigned int);
+extern bool default_target_option_valid_attribute_p (tree, tree, tree, int);
+extern bool default_target_option_pragma_parse (tree, tree);
+extern bool default_target_option_can_inline_p (tree, tree);