depends %JPEG

optional_depends avahi    "--enable-avahi" "--disable-avahi"   "for service discovery support"
optional_depends gphoto2  "--with-gphoto2" "--without-gphoto2" "for gphoto2 support"

optional_depends libusb-compat  "--enable-libusb_1_0" "--disable-libusb" "for usb scanners"
optional_depends libieee1284    "" "" "for parallel port support"
