1 !isEmpty(QMAKE_INCDIR_OPENVG): INCLUDEPATH += $$QMAKE_INCDIR_OPENVG

     2 !isEmpty(QMAKE_LIBDIR_OPENVG): QMAKE_LIBDIR += -L$$QMAKE_LIBDIR_OPENVG

     3 !isEmpty(QMAKE_LIBS_OPENVG): LIBS += $$QMAKE_LIBS_OPENVG

     4 

     5 contains(QT_CONFIG, egl) {

     6     !isEmpty(QMAKE_INCDIR_EGL): INCLUDEPATH += $$QMAKE_INCDIR_EGL

     7     !isEmpty(QMAKE_LIBDIR_EGL): LIBS += -L$$QMAKE_LIBDIR_EGL

     8     !isEmpty(QMAKE_LIBS_EGL): LIBS += $$QMAKE_LIBS_EGL

     9 }

    10 

    11 contains(QT_CONFIG, openvg_on_opengl) {

    12     !isEmpty(QMAKE_INCDIR_OPENGL): INCLUDEPATH += $$QMAKE_INCDIR_OPENGL

    13     !isEmpty(QMAKE_LIBDIR_OPENGL): QMAKE_LIBDIR += -L$$QMAKE_LIBDIR_OPENGL

    14     !isEmpty(QMAKE_LIBS_OPENGL): LIBS += $$QMAKE_LIBS_OPENGL

    15 }