Index: config.auto.h.in
===================================================================
--- config.auto.h.in	(revision 2232)
+++ config.auto.h.in	(revision 2233)
@@ -29,6 +29,9 @@
 
 /**** TODO ****/
 
+/* C89 has atexit() */
+#define HAS_ATEXIT 1
+
 /* Define to 1 if you have the `canonicalize_file_name' function. */
 #define HAVE_CANONICALIZE_FILE_NAME 1