int cvEllipse2Poly(CvPoint center, CvSize axes, int angle, int arc_start, int arc_end, CvPoint *pts, int delta) {
    void *fptr;
    int retval;

    fptr = dlsym(_Chcv_handle, "cvEllipse2Poly_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return -1;
    }
    dlrunfun(fptr, &retval, cvEllipse2Poly, center, axes, angle, arc_start, arc_end, pts, delta);
    return retval;
}
