commit c3692c5094223df1a029087aff69e5f038d9e7af
from: Martijn van Duren <martijn@openbsd.org>
date: Fri Nov 15 11:40:39 2019 UTC

XOPEN_SOURCE is not needed

commit - 8cd1444497800d39c99f623a4fffaa049250c14b
commit + c3692c5094223df1a029087aff69e5f038d9e7af
blob - c6fe7be0115ad232a3775fffb4a87a9e161beaf4
blob + dbcefc864874d975f2a1004e695663251b1648c5
--- iobuf.c
+++ iobuf.c
@@ -15,7 +15,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#define _XOPEN_SOURCE 1
 #define _GNU_SOURCE 1
 #define _BSD_SOURCE 1