FGRun does not compile under Ubuntu 10.04 64Bit with OpenSceneGraph v3.0.1. flightgear v2.4 runs fine. Simgear and Flightgear all compiled from source and working OK.
Starts of with error on osgGA
Fl_OSG.o: In function `osgGA::EventQueue::windowResize(int, int, int, int)':
/usr/local/include/osgGA/EventQueue:74: undefined reference to `osgGA::EventQueue::windowResize(int, int, int, int, double)'
Current
/** Method for adapting window resize event, placing this event on the back of the event queue. */
void windowResize(int x, int y, int width, int height) { windowResize(x,y,width,height,getTime()); }
/** Method for adapting window resize event, placing this event on the back of the event queue, with specified time. */
void windowResize(int x, int y, int width, int height, double time);
Using revision 629 source of FGRUN via SVN