Ubuntu17.04安装完qt之后，构建项目就会出现:-1: error: cannot find -lGL
执行 sudo apt-get install libgl1-mesa-dev
安装成功就可以解决了。
注：如果使用 sudo apt-get install libgl1-mesa-dev 一直提示错误，说依赖关系被破坏。则需要进行源的配置与更新
### 修改源命令：
sudo gedit /etc/apt/sources.list
### 把sources.list内容替换成一下内容
##阿里云
deb http://mirrors.aliyun.com/ubuntu/ zesty main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ zesty-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ zesty-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ zesty-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ zesty main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ zesty-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ zesty-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ zesty-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb http://archive.canonical.com/ubuntu/ zesty partner
deb http://extras.ubuntu.com/ubuntu/ zesty main
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