with SGI's OpenInventor, I had to change
OpenSceneGraph/src/osgPlugins/Inventor, as SoVRMLImageTexture is not avaible
in SGI's Inventor. "
From Robert Osfield, tweaked the above so that it uses Coin headers to switch on coin features:
#ifdef COIN_SOCALLBACKACTION_H
#define USE_COIN 1
#endif