void cvPolarToCart(CvArr* magnitude, CvArr* angle, CvArr* x, CvArr* y, int angle_in_degrees) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvPolarToCart_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvPolarToCart, magnitude, angle, x, y, angle_in_degrees);
}
