uses CONFIG_ROM_STREAM uses CONFIG_IDE_STREAM uses CONFIG_FS_STREAM uses CONFIG_IDE uses CONFIG_SERIAL_STREAM if CONFIG_ROM_STREAM object rom_stream.o end if CONFIG_IDE_STREAM default CONFIG_IDE=1 object ide_stream.o end if CONFIG_FS_STREAM object fs_stream.o dir fs end if CONFIG_SERIAL_STREAM object serial_stream.o end