darkplaces-sdl linux should be linked against libudev
-ludev linker flag should be added for linux version of darkplaces-sdl, otherwise it gives error on start: libSDL2-2.0.so.0: undefined symbol: _udev_device_get_action
-ludev linker flag should be added for linux version of darkplaces-sdl, otherwise it gives error on start: libSDL2-2.0.so.0: undefined symbol: _udev_device_get_action