Without this change, <time.h> does not declare strptime, leading to an
implicit function declaration and a build failure with future
compilers.
diff -up cronolog-1.6.2/src/cronoutils.c.c99 cronolog-1.6.2/src/cronoutils.c
--- cronolog-1.6.2/src/cronoutils.c.c99 2001-05-03 18:43:21.000000000 +0200
+++ cronolog-1.6.2/src/cronoutils.c 2023-02-02 08:01:48.533575521 +0100
@@ -69,6 +69,10 @@
*
*/
+/* Declare strptime in <time.h>. */
+#define _XOPEN_SOURCE
+#define _DEFAULT_SOURCE
+
#include "cronoutils.h"
extern char *tzname[2];