From: antirez <antirez@gmail.com>
Date: Thu, 25 Oct 2012 14:15:55 +0000 (+0200)
Subject: Fix compilation on Linux kernels or glibc versions lacking sync_file_range().
X-Git-Url: https://git.saurik.com/redis.git/commitdiff_plain/be407c015c1848b145ad57edc023a1a810f8c6a9?ds=inline

Fix compilation on Linux kernels or glibc versions lacking sync_file_range().

This fixes issue #667.

Many thanks to Didier Spezia for the fix.
---

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)