From fe16912e9b9466a5a167c962e745d5690459f099 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Thu, 2 Jun 2011 16:16:39 +0200
Subject: [PATCH] In ./configure check if umount support --fake and
 --no-canonicalize options and warn othewise

---
 configure.in | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/configure.in b/configure.in
index 0e41cca..aab304b 100644
--- a/configure.in
+++ b/configure.in
@@ -97,5 +97,27 @@ AM_CONDITIONAL(LINUX, test "$arch" = linux)
 AM_CONDITIONAL(NETBSD, test "$arch" = netbsd)
 AM_CONDITIONAL(BSD, test "$arch" = bsd)
 
+util_linux_ok=yes
+if test "$arch" = linux -a "$cross_compiling" != "yes"; then
+	AC_MSG_CHECKING([if umount supports --fake --no-canonicalize])
+	# exit code of umount is 1 if option is unrecognised, 2 otherwise
+	umount --fake --no-canonicalize > /dev/null 2>&1
+	if test $? != 1; then
+		AC_MSG_RESULT([yes])
+	else
+		firstline=`umount --fake --no-canonicalize 2>&1 | head -1`
+		AC_MSG_RESULT([$firstline])
+		util_linux_ok=no
+	fi
+fi
+
 AC_CONFIG_FILES([fuse.pc Makefile lib/Makefile util/Makefile example/Makefile include/Makefile])
 AC_OUTPUT
+
+if test "$util_linux_ok" = no; then
+	AC_MSG_WARN([
+******************************************************************
+* Please install util-linux version 2.18 or later which supports *
+* --fake and --no-canonicalize options in mount and umount       *
+******************************************************************])
+fi
-- 
2.30.2