请老师帮忙！
book@ubuntu:~/openharmony/kernel/liteos_a$ sudo make -j 8 # 编译内核，可以得到out/imx6ull/liteos.bin
make[1]: 进入目录“/home/book/openharmony/kernel/liteos_a”
/home/book/openharmony/kernel/liteos_a/tools/menuconfig/conf --silentoldconfig /home/book/openharmony/kernel/liteos_a/Kconfig
mv -f /home/book/openharmony/kernel/liteos_a/include/generated/autoconf.h /home/book/openharmony/kernel/liteos_a/platform/include/menuconfig.h
make[1]: 离开目录“/home/book/openharmony/kernel/liteos_a”
make: WARNING:Set: Command not found
Makefile:120: recipe for target ‘/home/book/openharmony/kernel/liteos_a/out/imx6ull’ failed
make: *** [/home/book/openharmony/kernel/liteos_a/out/imx6ull] Error 127