win32 { INCLUDEPATH += C:/Qwt-5.2.2/include/ CONFIG(debug, debug|release) { message("Debug version of Qwt") LIBS += -LC:/Qwt-5.2.2/lib -lqwtd5 } CONFIG(release, debug|release) { message("Release version of Qwt") LIBS += -LC:/Qwt-5.2.2/lib -lqwt5 }}