The attached patch (+ autoreconf) should fix the problem.
--
Andreas Henriksson
--- gvfs-1.6.1/configure.ac.orig 2010-05-25 15:46:41.000000000 +0200
+++ gvfs-1.6.1/configure.ac 2010-05-25 15:47:02.000000000 +0200
@@ -243,7 +243,7 @@
if test "x$enable_gdu" != "xno"; then
PKG_CHECK_EXISTS([gdu >= $GDU_REQUIRED], msg_gdu=yes)
- if test "x$msg_gdu" == "xyes"; then
+ if test "x$msg_gdu" = "xyes"; then
PKG_CHECK_MODULES([GDU],[gdu >= $GDU_REQUIRED])
AC_DEFINE(HAVE_GDU, 1, [Define to 1 if gnome-disk-utility is available])
fi
