From be407c015c1848b145ad57edc023a1a810f8c6a9 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Thu, 25 Oct 2012 16:15:55 +0200
Subject: [PATCH 1/1] Fix compilation on Linux kernels or glibc versions
 lacking sync_file_range().

This fixes issue #667.

Many thanks to Didier Spezia for the fix.
---
 src/config.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/config.h b/src/config.h
index 617682fc..ce7e53b0 100644
--- a/src/config.h
+++ b/src/config.h
@@ -55,6 +55,19 @@
 /* Define rdb_fsync_range to sync_file_range() on Linux, otherwise we use
  * the plain fsync() call. */
 #ifdef __linux__
+#include <linux/version.h>
+#ifdef __GLIBC__
+#if (LINUX_VERSION_CODE >= 0x020617 && GLIBC_VERSION_AT_LEAST(2, 6))
+#define HAVE_SYNC_FILE_RANGE 1
+#endif
+#else
+#if (LINUX_VERSION_CODE >= 0x020617)
+#define HAVE_SYNC_FILE_RANGE 1
+#endif
+#endif
+#endif
+
+#ifdef HAVE_SYNC_FILE_RANGE
 #define rdb_fsync_range(fd,off,size) sync_file_range(fd,off,size,SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE)
 #else
 #define rdb_fsync_range(fd,off,size) fsync(fd)
-- 
2.47.2