I'm already using OpenCV version 2.8 with CMake but now I want to test some of the new functionalities which have been added in the version 3.0 so I installed it but I'm not able to link my QT project to new version installed. I already checked this link where they explain how to have 2 different versions of OpenCV on the same PC but it's not clear enough how to link the project to new one. Any hints on how to achieve it? what should I modify in the CMake file?