qt-everywhere-src-5.15.1/qtbase/src/widgets/statemachine/statemachine.pri

qtConfig(statemachine): \
    SOURCES += $$PWD/qguistatemachine.cpp

qtConfig(qeventtransition) {
    HEADERS += \
	   $$PWD/qkeyeventtransition.h \
	   $$PWD/qmouseeventtransition.h \
	   $$PWD/qbasickeyeventtransition_p.h \
	   $$PWD/qbasicmouseeventtransition_p.h
    SOURCES += \
	   $$PWD/qkeyeventtransition.cpp \
	   $$PWD/qmouseeventtransition.cpp \
	   $$PWD/qbasickeyeventtransition.cpp \
	   $$PWD/qbasicmouseeventtransition.cpp
}