var/spack/repos/builtin/packages/mvapich2/ad_lustre_rwcontig_open_source.patch


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--- a/src/mpi/romio/adio/ad_lustre/ad_lustre_rwcontig.c	2013-12-10 12:05:44.806417000 -0800
+++ b/src/mpi/romio/adio/ad_lustre/ad_lustre_rwcontig.c	2013-12-10 11:53:03.295622000 -0800
@@ -8,7 +8,7 @@
  *   Copyright (C) 2008 Sun Microsystems, Lustre group
  */
 
-#define _XOPEN_SOURCE 600
+//#define _XOPEN_SOURCE 600
 #include <stdlib.h>
 #include <malloc.h>
 #include "ad_lustre.h"