如题：
scripts/extract-cert.c:21:25: fatal error: openssl/bio.h: No such file or directory compilation terminated. scripts/Makefile.host:90: recipe for target 'scripts/extract-cert' failed make[1]: *** [scripts/extract-cert] Error 1 Makefile:556: recipe for target 'scripts' failed make: *** [scripts] Error 2
安装openssl：
ubuntu16.04机器：
sudo apt install libssl-dev