make[1]: *** [/home/iTop4412/iTop4412_Kernel_3.0/Makefile:420: scripts_basic] Error 2

在ubuntu20上重新部署4412的编译环境后，make zImage，一直报错如下：

HOSTCC scripts/basic/fixdep
/bin/sh: 1: gcc: not found
make[2]: *** [scripts/Makefile.host:118: scripts/basic/fixdep] Error 127
make[1]: *** [/home/iTop4412/iTop4412_Kernel_3.0/Makefile:420: scripts_basic] Error 2
make: *** No rule to make target 'include/config/auto.conf', needed by 'include/config/kernel.release'. Stop.

百度摸索一番，解决方法：