From 4b36e6bde1f44d5b792f9276ee6a80985dda843d Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Mon, 25 Sep 2000 13:16:15 +0000
Subject: For the benefit of SunOS 4.1.4, define MS_SYNC as 0 when it's
 undefined.  ccording to MvL, this is safe: the MS_SYNC flag means that
 msync() returns when all I/O operations are scheduled; without it, it waits
 until they are complete, which is acceptable behavior.

---
 Modules/mmapmodule.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 467f110..cbb2452 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -32,8 +32,14 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
+
+#ifndef MS_SYNC
+/* This is missing e.g. on SunOS 4.1.4 */
+#define MS_SYNC 0
 #endif
 
+#endif /* UNIX */
+
 #include <string.h>
 #include <sys/types.h>
 
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