void cvCalcEigenObjects(int nObjects, void* input, void* output, int ioFlags, int ioBufSize, void* userData, CvTermCriteria* calcLimit, IplImage* avg, float* eigVals) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvCalcEigenObjects_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvCalcEigenObjects, nObjects, input, output, ioFlags, ioBufSize, userData, calcLimit, avg, eigVals);
}
