-void err_msg (const struct error *);
-
-void verbose_msg (int level, const char *format, ...)
- PRINTF_FORMAT (2, 3);
-
-/* 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 *);