ubuntu下安装好后报错

刚安装好的qt新建项目报错，而且项目里只有.pro文件，添加环境变量什么的也试过了（可能方法不对），怎么解决

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Project ERROR: Cannot run compiler 'clang++'. Output:
===================
===================
Maybe you forgot to setup the environment?
Error while parsing file /home/zzpzcp/Qt5.13.0/Examples/Qt-5.13.0/gui/analogclock/analogclock.pro. Giving up.
Project ERROR: Cannot run compiler 'clang++'. Output:
===================
===================
Maybe you forgot to setup the environment?
Error while parsing file /home/zzpzcp/untitled/untitled.pro. Giving up.

20091001753	2019-06-23 01:25
sudo apt-get update sudo apt-get install build-essential sudo apt-get install libgl1-mesa-dev

zzpzcp	2019-06-23 10:40
20091001753:sudo apt-get update sudo apt-get install build-essential sudo apt-get install libgl1-mesa-dev (2019-06-23 01:25) 还是不行 Project ERROR: Cannot run compiler 'clang++'. Output: =================== =================== Maybe you forgot to setup the environment? Error while parsing file /home/zzpzcp/untitled/untitled.pro. Giving up.

zzpzcp	2019-06-23 11:55
降低qt版本之后正常了（qt5.13.0————qt5.12.4）当然，该配置的环境还是要配置好

fsu0413	2019-07-05 09:30
你用的是软件源里的Qt还是Qt官网下载的Qt？ Linux下不建议使用官网下载的Qt，会出什么问题都不好说