Now, we have choice between "WITH_CGAL_Qt4" and "WITH_CGAL_Qt5" (like before because differents CGAL_QtX sources folders return).
Once the libCGALQt4 or libCGALQt5 configured, an cmake config variable "CGAL_QT_RECENT" allow us to know what is the more recent libCGAL_QtX configured.
Automaticaly,the demonstrations chose this recent version of Qt to build their project (even if a Qt version choice is proposed during CMake configuration)
During CMake configuration, when the user change the version of libCGAL_QtX, that change automaticaly the Qt version of find_package(QtX)
Now Qt4or5 is the thing allowing the choice between Qt4 and Qt5 (find_package(CGAL COMPONENT Qt4or5) or find_package(Qt4or5))
Aurélien Vialon