The game can be found at https://github.com/lakermann/connect-four-challenge-server
If QT is not found on your platform you can point CMAKE_PREFIX_PATH to it.
cmake -DCMAKE_PREFIX_PATH=/.../Qt/platform ...
To inspect QT Datatypes like QString, QVector, QPointer, ... in lldb use the rendering scripts from https://bitbucket.org/lukeworth/lldb-qt-formatters/overview
Google + space after * and &