查看本系列汇总：LINUX进阶之路汇总（持续更新）
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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
