-CXXFLAGS = -I$(QTDIR)/include -I$(QTDIR)/include/QtCore -I$(QTDIR)/include/QtGui -I$(QTDIR)/include/QtWidgets -I/mingw/include
-QTLDLIBS = -L$(QTDIR)/lib -lQt5Core -lQt5Gui -lQt5Widgets
+CXXFLAGS = -I$(QTDIR)/include -I$(QTDIR)/include/QtCore -I$(QTDIR)/include/QtGui
+QTLDLIBS = -L$(QTDIR)/lib -lQtCore4 -lQtGui4