ubuntu上cargo run报错error: failed to run custom build command for `openssl-sys v0.9.80`

这是因为使用reqwest的包，用到了openssl的库。 按照提示"Make sure you also have the development packages of openssl installed. libssl-dev on Ubuntu or openssl-devel on Fedora.，

执行如下命令

1、 sudo apt install libssl-dev

再次执行cargo run 还是同样报错，再看提示，好像还缺一个包 “It looks like you're compiling on Linux and also targeting Linux. Currently this requires the pkg-config utility to find OpenSSL but unfortunately pkg-config could not be found. If you have OpenSSL installed you can likely fix this by installing pkg-config.“

2、 sudo apt install pkg-config

安装完成后，再执行cargo run 编译通过了。