-/* File-locator stack. */
-void err_push_file_locator (const struct file_locator *);
-void err_pop_file_locator (const struct file_locator *);
-void err_location (struct file_locator *);
-
-/* Obscure functions. */
-void err_set_command_name (const char *);
-void err_done (void);
-void err_check_count (void);
-void err_vmsg (const struct error *, const char *, va_list);