diff -urb cronolog-1.6.2/src/cronoutils.c cronolog-1.6.2-patched/src/cronoutils.c
--- cronolog-1.6.2/src/cronoutils.c	2001-05-03 09:43:21.000000000 -0700
+++ cronolog-1.6.2/src/cronoutils.c	2008-01-05 22:08:42.000000000 -0800
@@ -69,6 +69,8 @@
  *
  */
 
+#define _GNU_SOURCE
+
 #include "cronoutils.h"
 extern char *tzname[2];