Note: The OpenGL 3D library was not found. More specifically, we found the headers, but not the libraries; so either GL is half-installed on this system, or something else went wrong. The `config.log' file might contain some clues. Those demos which use 3D will not be built or installed. You might want to consider installing OpenGL and re-running configure. If your vendor doesn't ship their own implementation of OpenGL, you can get a free version at . For general OpenGL info, see .