void cvSet1D(CvArr* arr, int idx0, CvScalar value) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvSet1D_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvSet1D, arr, idx0, value);
}
