ubuntu下，c++ 开发opencv，编译时没有报错， 运行时，发现报如下错 The library is compiled without QT support in function 原因是，安装编译时，未启用QT，报错如下 terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(4.2.0) ~/opencv-4.2.0/opencv/modules/highgui/src/win