common/rdsched: Document why we need _XOPEN_SOURCE

It's for strptime().

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

diff --git a/src/lib/common/rdsched.c b/src/lib/common/rdsched.c
index 579600165d0b781c5ff55fa58cf88931f3629243..88f5c6e2348b3d9ab49333e46f50ac809a6660a4 100644 (file)
--- a/src/lib/common/rdsched.c
+++ b/src/lib/common/rdsched.c
@@ -30,6 +30,7 @@
  *     Markus Armbruster, 2007-2011
  */
 
+/* Required for strptime() */
 #define _XOPEN_SOURCE 500
 
 #include <config.h>