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.

diff --git a/bootstrap.conf b/bootstrap.conf
index d029253d3a81dc779b0a02f959c1dc8beba9498c..0faa2e2217f830a468dcd88d383a23ba1a9f67a4 100644 (file)
--- 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 df19445974897486b2bb4711d34f18124c8eba8c..6a0936a9ba24f5ce2812a42311c44f2acf37e8f0 100644 (file)
--- 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.