QT += core gui SOURCES += main.cpp greaterThan(QT_MAJOR_VERSION, 5):lessThan(QT_MINOR_VERSION, 1):equals(QT_PATCH_VERSION, 0) { DEFINES += SUPER_FRESH_MAJOR_QT_RELEASE } greaterThan(QT_VERSION, 6.6.5):lessThan(QT_VERSION, 6.6.7):equals(QT_VERSION, 6.6.6): { DEFINES += QT_VERSION_OF_THE_BEAST }