make[1]: nds32le-elf-g++: Command not found ../scripts/rules.mk:105: recipe for target 'firmware' failed make[1]: *** [firmware] Error 127 Makefile:181: recipe for target 'st' failed make: *** [st] Error 2
原因，没有添加编译链环境变量
export PATH=/usr/local/bin/nds32le-elf-mculib-v3/bin/:$PATH
添加永久环境变量：
vi /etc/profile
t添加
export PATH=/usr/local/bin/nds32le-elf-mculib-v3/bin/:$PATH
保存，然后source刷新刚才保存的。
source vi /etc/profile
