!isEmpty(QMAKE_INCDIR_OPENVG): INCLUDEPATH += $$QMAKE_INCDIR_OPENVG
!isEmpty(QMAKE_LIBDIR_OPENVG): QMAKE_LIBDIR += -L$$QMAKE_LIBDIR_OPENVG
!isEmpty(QMAKE_LIBS_OPENVG): LIBS += $QMAKE_LIBS_OPENVG

contains(QT_CONFIG, openvg_on_opengl) {
    !isEmpty(QMAKE_INCDIR_OPENGL): INCLUDEPATH += $$QMAKE_INCDIR_OPENGL
    !isEmpty(QMAKE_LIBDIR_OPENGL): QMAKE_LIBDIR += -L$$QMAKE_LIBDIR_OPENGL
    !isEmpty(QMAKE_LIBS_OPENGL): LIBS += $QMAKE_LIBS_OPENGL
}