scripts/extract-cert.c:21:25: fatal error: openssl/bio.h

报错问题 1：scripts/extract-cert.c:21:25: fatal error: openssl/bio.h

报错原因：

编译内核命令：make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi-

出现fatal error: openssl/名单.h: No such file or directory。原因是libssl-dev～没有安装

libssl-dev包含libraries, header files and manpages，是openssl的一部分

解决方法：

sudo apt-get install libssl-dev

报错问题 2：

$ sudo apt-get install libssl-dev
Reading package lists... Done
Building dependency tree     
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
 libssl-dev : Depends: libssl1.0.0 (= 1.0.1-4ubuntu5) but 1.0.1-4ubuntu5.3 is to be installed
              Recommends: libssl-doc but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

解决方法：

sudo aptitude install libssl-dev

根据提示操作，替换掉当前的libssl-dev

参考链接：

https://blog.youkuaiyun.com/beilson/article/details/79774036

https://blog.youkuaiyun.com/newmann/article/details/70149021