-#ifndef __BACKUPFILE_P
-# if defined __STDC__ || __GNUC__
-# define __BACKUPFILE_P(args) args
-# else
-# define __BACKUPFILE_P(args) ()
+char *find_backup_file_name (char const *, enum backup_type);
+enum backup_type get_version (char const *context, char const *arg);
+enum backup_type xget_version (char const *context, char const *arg);
+void addext (char *, char const *, int);
+
+
+# ifdef __cplusplus
+}