QT += serialbus widgets requires(qtConfig(combobox)) qtConfig(modbus-serialport): QT += serialport TARGET = modbusmaster TEMPLATE = app CONFIG += c++11 SOURCES += main.cpp\ mainwindow.cpp \ settingsdialog.cpp \ writeregistermodel.cpp HEADERS += mainwindow.h \ settingsdialog.h \ writeregistermodel.h FORMS += mainwindow.ui \ settingsdialog.ui RESOURCES += \ master.qrc target.path = $$[QT_INSTALL_EXAMPLES]/serialbus/modbus/master INSTALLS += target