system. */
extern Lisp_Object Vselect_safe_coding_system_function;
+/* If nonzero, on writing a file, Vselect_safe_coding_system_function
+ is called even if Vcoding_system_for_write is non-nil. */
+extern int coding_system_require_warning;
+
/* Coding system for file names, or nil if none. */
extern Lisp_Object Vfile_name_coding_system;