diff -r b9c6012bccdb -r 49e3e9bfc3ab maemo-ui/configure.ac
--- a/maemo-ui/configure.ac	Fri Oct 06 16:13:28 2006 +0100
+++ b/maemo-ui/configure.ac	Wed Feb 14 22:25:09 2007 +0000
@@ -179,10 +179,36 @@
 AC_SUBST(GSTBASE_CFLAGS)
 AC_SUBST(GSTBASE_LIBS)
 
-
 # make GST_MAJORMINOR available in Makefile.am
 AC_SUBST(GST_MAJORMINOR)
 
+
+# check for gstreamer-base plugins (xoverlay interface)
+GSTPLUGINSBASE_REQUIRED=0.10
+GSTPLUGINSBASE_MAJORMINOR=0.10
+PKG_CHECK_MODULES(GSTPLUGINSBASE, \
+  gstreamer-plugins-base-$GSTPLUGINSBASE_MAJORMINOR >= $GSTPLUGINSBASE_REQUIRED,
+  HAVE_GSTPLUGINSBASE=yes, HAVE_GSTPLUGINSBASE=no)
+
+# Give error and exit if we don't have gstreamer base libraries
+if test "x$HAVE_GSTPLUGINSBASE" = "xno"; then
+  AC_MSG_ERROR(you need gstreamer plugins base development packages installed !)
+fi
+
+# make GSTPLUGINSBASE_CFLAGS and GSTPLUGINSBASE_LIBS available
+AC_SUBST(GSTPLUGINSBASE_CFLAGS)
+AC_SUBST(GSTPLUGINSBASE_LIBS)
+
+# check for gstreamer-interfaces (xoverlay interface)
+AC_CHECK_FUNC( gst_x_overlay_get_type,
+  HAVE_GSTINTERFACES=yes, HAVE_GSTINTERFACES=no )
+
+# Give error and exit if we don't have gstreamer base libraries
+if test "x$HAVE_GSTINTERFACES" = "xno"; then
+  AC_MSG_NOTICE(you need gstreamer interfaces development packages installed !)
+  CFLAGS="$CFLAGS -lgstinterfaces-$GSTPLUGINSBASE_MAJORMINOR"
+fi
+
 #
 # mysql libraries
 #