我尝试按照此tutorial安装opencv ubuntu 14.04。在执行此操作后，我在QT中创建了一个C ++项目。显示错误消息：
g++ -m64 -o test main.o mainwindow.o moc_mainwindow.o
-L/usr/X11R6/lib64 -L/usr/local/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib
-lopencv_legacy -lopencv_flann
-lopencv_xfeatures2d -lopencv_imgcodecs -lQt5Widgets -L/usr/lib/x86_64-linux-gnu -lQt5Gui -lQt5Core -lGL -lpthread
//error is here
/usr/bin/ld: cannot find -lopencv_contrib
/usr/bin/ld: cannot find -lopencv_legacy
/usr/bin/ld: cannot find -lopencv_xfeatures2d
collect2: error: ld returned 1 exit status
make: *** [test] Error 1
06:00:12: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project test (kit: Desktop)
When executing step 'Make'
谢谢：）