int cvSeqPartition(CvSeq* seq, CvMemStorage* storage, CvSeq** labels, CvCmpFunc is_equal, void* userdata) {
    void *fptr;
    int retval;

    fptr = dlsym(_Chcv_handle, "cvSeqPartition_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return -1;
    }
    dlrunfun(fptr, &retval, cvSeqPartition, seq, storage, labels, is_equal, userdata);
    return retval;
}
