From 6101a699572faeb81009f0db1e782c01e28af253 Mon Sep 17 00:00:00 2001
From: Mike Gelfand <mikedld@mikedld.com>
Date: Tue, 23 Jun 2015 21:16:33 +0000
Subject: [PATCH] Avoid possible `_XOPEN_SOURCE` redefinition warning

---
 libtransmission/verify.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libtransmission/verify.c b/libtransmission/verify.c
index b034a9d04..f0882d7bc 100644
--- a/libtransmission/verify.c
+++ b/libtransmission/verify.c
@@ -7,11 +7,15 @@
  * $Id$
  */
 
+#if defined (HAVE_POSIX_FADVISE) && (!defined (_XOPEN_SOURCE) || _XOPEN_SOURCE < 600)
+ #undef _XOPEN_SOURCE
+ #define _XOPEN_SOURCE 600
+#endif
+
 #include <string.h> /* memcmp () */
 #include <stdlib.h> /* free () */
 
 #ifdef HAVE_POSIX_FADVISE
- #define _XOPEN_SOURCE 600
  #include <fcntl.h> /* posix_fadvise () */
 #endif