* Don't use fdatasync since it doesn't work on Snow Leopard.

* Don't refer to config.h in util.hh, because config.h is not
  installed (http://hydra.nixos.org/build/303053).

configure.ac

@@ -262,7 +262,6 @@ 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,

src/libstore/local-store.cc

@@ -240,7 +240,7 @@ void LocalStore::appendReferrer(const Path & from, const Path & to, bool lock)
     string s = " " + to;
     writeFull(fd, (const unsigned char *) s.c_str(), s.size());
 
-    if (doFsync) fdatasync(fd);
+    if (doFsync) fsync(fd);
 }
 
 
@@ -271,7 +271,7 @@ void LocalStore::rewriteReferrers(const Path & path, bool purge, PathSet referre
     
     writeFull(fd, (const unsigned char *) s.c_str(), s.size());
 
-    if (doFsync) fdatasync(fd);
+    if (doFsync) fsync(fd);
     
     fd.close(); /* for Windows; can't rename open file */
 

src/libutil/util.cc

@@ -233,7 +233,7 @@ void writeFile(const Path & path, const string & s, bool doFsync)
     if (fd == -1)
         throw SysError(format("opening file `%1%'") % path);
     writeFull(fd, (unsigned char *) s.c_str(), s.size());
-    if (doFsync) fdatasync(fd);
+    if (doFsync) fsync(fd);
 }
 
 

src/libutil/util.hh

@@ -1,8 +1,6 @@
 #ifndef __UTIL_H
 #define __UTIL_H
 
-#include "config.h"
-
 #include "types.hh"
 
 #include <sys/types.h>
@@ -12,10 +10,6 @@
 
 #include <cstdio>
 
-#ifndef HAVE_FDATASYNC
-#define fdatasync fsync
-#endif
-
 
 namespace nix {