extern const GLubyte* gluErrorString( GLenum errorCode );

/*
extern void gluNurbsCallback( GLUnurbsObj *nobj, GLenum which, void (*fn)() );
extern void gluTessCallback( GLUtriangulatorObj *tobj, GLenum which,
			      void (*fn)() );
*/

extern const GLubyte* gluGetString( GLenum name );