[osg-users] getWindowingSystemInterface() fails on Ubuntu 18.04

[Julien Valentin]

WindowingSystemInterface is an interface implemented in system dependant osgViewer::XXXWindowingSystemInterface
What may be done is to add a system agnotistic windowInterface in osgviewer

 #ifdef SYS
typedef  osgViewer::SYSWindowingSystemInterface osgViewer::WindowingInterface
 #else if SYS2
typedef osgViewer::SYS2WindowingSystemInterface osgViewer::WindowingInterface

In your case try to use osgUtil::X11WindowingSystemInterface

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http://forum.openscenegraph.org/viewtopic.php?p=74653#74653