lessThan(QT_MAJOR_VERSION,5)|lessThan(QT_MINOR_VERSION,9) { message("You need to Qt 5.9 or newer to build OSCR with Help Pages") lessThan(QT_MAJOR_VERSION,5)|lessThan(QT_MINOR_VERSION,7) { error("You need Qt 5.7 or newer to build OSCR") } } TEMPLATE = subdirs SUBDIRS += oscr CONFIG += ordered