From 9cf70dad0fab41f668e2e63c2a40a69b4a7e3dec Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Mon, 24 Oct 2011 16:40:05 -0600
Subject: [PATCH] build: use gnulib fdatasync

Commit 1726a73 hacked around MacOS' lack of fdatasync, since
gnulib did not have it at the time.  But now that we use newer
gnulib, we can avoid the hack.

* bootstrap.conf (gnulib_modules): Add fdatasync.
* configure.ac (AC_CHECK_FUNCS_ONCE): Drop our own check.
---
 bootstrap.conf | 1 +
 configure.ac   | 5 +----
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/bootstrap.conf b/bootstrap.conf
index d029253d3a..0faa2e2217 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -40,6 +40,7 @@ environ
 fclose
 fcntl
 fcntl-h
+fdatasync
 ffs
 fnmatch
 fsync
diff --git a/configure.ac b/configure.ac
index df19445974..6a0936a9ba 100644
--- a/configure.ac
+++ b/configure.ac
@@ -135,12 +135,9 @@ AC_CHECK_SIZEOF([long])
 
 dnl Availability of various common functions (non-fatal if missing),
 dnl and various less common threadsafe functions
-AC_CHECK_FUNCS_ONCE([cfmakeraw fdatasync geteuid getgid getgrnam_r getmntent_r \
+AC_CHECK_FUNCS_ONCE([cfmakeraw geteuid getgid getgrnam_r getmntent_r \
   getpwuid_r getuid initgroups kill mmap posix_fallocate posix_memalign \
   regexec sched_getaffinity])
-if test $ac_cv_func_fdatasync = no; then
-  AC_DEFINE([fdatasync], [fsync], [Define to fsync if you lack fdatasync])
-fi
 
 dnl Availability of pthread functions (if missing, win32 threading is
 dnl assumed).  Because of $LIB_PTHREAD, we cannot use AC_CHECK_FUNCS_ONCE.