+_TUXBOX_APPS_LIB_PKGCONFIG_OPTIONAL(GSTREAMER,gstreamer,HAVE_GSTREAMER)
+AC_CHECK_LIB(jpeg, jpeg_set_defaults, HAVE_JPEG="yes", HAVE_JPEG="no")
+JPEG_LIBS="-ljpeg"
+AC_SUBST(JPEG_LIBS)
+
+AC_CHECK_LIB(ungif, DGifOpenFileName, HAVE_LIBUNGIF="yes", HAVE_LIBUNGIF="no")
+LIBUNGIF_LIBS="-lungif"
+AC_SUBST(LIBUNGIF_LIBS)