+
+#endif /* defined(LISP_FEATURE_SB_LDB) */
+
+/* what we do when things go badly wrong at a low level */
+void
+monitor_or_something()
+{
+#if defined(LISP_FEATURE_SB_LDB)
+ ldb_monitor();
+#else
+ fprintf(stderr, "There's no LDB in this build; exiting.\n");
+ exit(1);
+#endif
+}