-PKG_CHECK_MODULES(FREETYPE, freetype2)
-PKG_CHECK_MODULES(FRIBIDI, fribidi)
-PKG_CHECK_MODULES(GSTREAMER, gstreamer-0.10, HAVE_GSTREAMER="yes", HAVE_GSTREAMER="no")
-PKG_CHECK_MODULES(GSTREAMERPBUTILS, gstreamer-pbutils-0.10, HAVE_GSTSTREAMERPBUTILS="yes", HAVE_GSTSTREAMERPBUTILS="no")
-PKG_CHECK_MODULES(ID3TAG, id3tag)
-PKG_CHECK_MODULES(DVBSI, libdvbsi++)
-PKG_CHECK_MODULES(PNG, libpng)
-PKG_CHECK_MODULES(LIBXINE, libxine, HAVE_LIBXINE="yes", HAVE_LIBXINE="no")
-PKG_CHECK_MODULES(XML2, libxml-2.0)
-PKG_CHECK_MODULES(MAD, mad)
-PKG_CHECK_MODULES(SIGC, sigc++-1.2)
-AC_CHECK_LIB(jpeg, jpeg_set_defaults, HAVE_JPEG="yes", HAVE_JPEG="no")
-JPEG_LIBS="-ljpeg"
-AC_SUBST(JPEG_LIBS)
+PKG_CHECK_MODULES(BASE, [freetype2 fribidi gstreamer-0.10 gstreamer-pbutils-0.10 libdvbsi++ libpng libxml-2.0 sigc++-1.2])
+PKG_CHECK_MODULES(LIBDDVD, libdreamdvd, HAVE_LIBDDVD="yes", HAVE_LIBDDVD="no")
+AM_CONDITIONAL(HAVE_LIBDDVD, test "$HAVE_LIBDDVD" = "yes")