From 2723d9b56e2ea15c0c753ae579849806102f4ce0 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 2 Feb 2010 11:57:49 +0000
Subject: [PATCH] * If fdatasync() isn't available, use fsync().

---
 configure.ac        | 1 +
 src/libutil/util.hh | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
index 46036113b..f6d983fda 100644
--- a/configure.ac
+++ b/configure.ac
@@ -262,6 +262,7 @@ AC_CHECK_FUNCS([setresuid setreuid lchown])
 # Nice to have, but not essential.
 AC_CHECK_FUNCS([strsignal])
 AC_CHECK_FUNCS([posix_fallocate])
+AC_CHECK_FUNCS([fdatasync])
 
 
 # This is needed if ATerm or bzip2 are static libraries,
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index 837382433..90132da73 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -12,6 +12,10 @@
 
 #include <cstdio>
 
+#ifndef HAVE_FDATASYNC
+#define fdatasync fsync
+#endif
+
 
 namespace nix {