depends -sub CXX gcc && if [[ $PCSC_DEVICE_ACCESS == libusb ]]; then depends libusb "--enable-libusb" elif [[ $PCSC_DEVICE_ACCESS == udev ]]; then depends DEVICE-MANAGER "--enable-libudev" fi && optional_depends policykit '--enable-polkit' '' 'PolicyKit support' && optional_depends systemd '' '--disable-libsystemd' 'SystemD support'