Cluster example compile fails on no-opengl configuration

http://coin.intra.qt.io/coin/integration/qt/tqtc-qt5/tasks/web_qt_tqtc-qt5_1566199615394

I/home/qt/work/install/include/QtCore -I.moc -I/home/qt/openssl-1.1.1b/include -I/home/qt/work/install/mkspecs/linux-g++ -o .obj/gauge.o gauge.cpp
agent:2019/08/19 07:44:57 build.go:215: In file included from gauge.cpp:52:
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h:61:5: error: ‘GLfloat’ does not name a type; did you mean ‘float’?
agent:2019/08/19 07:44:57 build.go:215: 61 | GLfloat cutRad;
agent:2019/08/19 07:44:57 build.go:215: | ^~~~~~~
agent:2019/08/19 07:44:57 build.go:215: | float
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h: In member function ‘int GaugeState::compare(const GaugeState*) const’:
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h:68:28: error: ‘cutRad’ was not declared in this scope
agent:2019/08/19 07:44:57 build.go:215: 68 | return std::tie(c, cutRad) > std::tie(co, other->cutRad);
agent:2019/08/19 07:44:57 build.go:215: | ^~~~~~
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h:68:58: error: ‘const struct GaugeState’ has no member named ‘cutRad’
agent:2019/08/19 07:44:57 build.go:215: 68 | return std::tie(c, cutRad) > std::tie(co, other->cutRad);
agent:2019/08/19 07:44:57 build.go:215: | ^~~~~~
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h: In member function ‘virtual void GaugeShader::updateState(const GaugeState*, const GaugeState*)’:
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h:114:9: error: ‘program’ was not declared in this scope
agent:2019/08/19 07:44:57 build.go:215: 114 | program()>setUniformValue(id_color, state>color);
agent:2019/08/19 07:44:57 build.go:215: | ^~~~~~~
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h:115:54: error: ‘const struct GaugeState’ has no member named ‘cutRad’
agent:2019/08/19 07:44:57 build.go:215: 115 | program()>setUniformValue(id_cutRad, state>cutRad);
agent:2019/08/19 07:44:57 build.go:215: | ^~~~~~
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h: In member function ‘virtual void GaugeShader::resolveUniforms()’:
agent:2019/08/19 07:44:57 build.go:215: gaugenode.h:121:20: error: ‘program’ was not declared in this scope
agent:2019/08/19 07:44:57 build.go:215: 121 | id_color = program()->uniformLocation("color");
agent:2019/08/19 07:44:57 build.go:215: | ^~~~~~~
agent:2019/08/19 07:44:57 build.go:215: Makefile:1447: recipe for target '.obj/gauge.o' failed
agent:2019/08/19 07:44:57 build.go:215: make[3]: *** [.obj/gauge.o] Error 1