strictly required to use struct timespec

glennklockwood · glennklockwood · commit 76a6497449fe · 2023-02-21T18:06:34.000-08:00
diff --git a/src/md-workbench.c b/src/md-workbench.c
@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 199309L
 #include <mpi.h>
 
 #include <time.h>
