__attribute__ ((visibility ("default")))
void APIENTRY glBegin( GLenum mode ) {
  typedef void *(*glBegin_t)( GLenum mode );
  static glBegin_t orig_glBegin = NULL;

  if(!orig_glBegin) 
    orig_glBegin = (glBegin_t)dlsym(RTLD_NEXT, "glBegin");

  orig_glBegin( mode );
  return; 
}