From a021886f982ed533fddf6e93ea50ba07a0d5fe75 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Thu, 8 Apr 2004 10:24:58 +0000
Subject: [PATCH] (jm_MACROS): Check for fdatasync within -lrt and -lposix4, so
 that it can be used in Solaris 2.5.1 and later.

---
 m4/jm-macros.m4 | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 7716e64..3c8372c 100644
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -81,7 +81,6 @@ AC_DEFUN([jm_MACROS],
   AC_CHECK_FUNCS( \
     endgrent \
     endpwent \
-    fdatasync \
     ftruncate \
     gethrtime \
     hasmntopt \
@@ -111,6 +110,15 @@ AC_DEFUN([jm_MACROS],
   AC_REQUIRE([GL_FUNC_GETCWD_PATH_MAX])
   AC_REQUIRE([GL_FUNC_READDIR])
 
+  # for dd.c and shred.c
+  fetish_saved_libs=$LIBS
+    AC_SEARCH_LIBS([fdatasync], [rt posix4],
+		   [test "$ac_cv_search_fdatasync" = "none required" ||
+		    LIB_FDATASYNC=$ac_cv_search_fdatasync])
+    AC_SUBST([LIB_FDATASYNC])
+    AC_CHECK_FUNCS(fdatasync)
+  LIBS=$fetish_saved_libs
+
   # See if linking `seq' requires -lm.
   # It does on nearly every system.  The single exception (so far) is
   # BeOS which has all the math functions in the normal runtime library
-- 
2.7.4