depends libpng &&
depends JPEG &&
depends tiff &&
depends DEVICE-MANAGER &&
optional_depends libusb \
                 "--with-usb" \
                 "--without-usb" \
                 "Enable libusb support" &&

optional_depends libgphoto2 \
                 "--with-gphoto2" \
                 "--without-gphoto2" \
                 "Enable libgphoto2 backend" &&
optional_depends GETTEXT \
                 "--enable-nls" \
                 "--disable-nls" \
                 "Native Language Support" &&
optional_depends v4l-utils \
                 "--with-v4l" \
                 "--without-v4l" \
                 "build v4l backend"
optional_depends libieee1284 \
                "" \
                "" \
                "parallel port support" &&
optional_depends avahi \
                "--enable-avahi" \
                "--disable-avahi" \
                "network support"