undefined reference to createFisherFaceRecognizer() - Incorrect openCV docs?

edit

Hello

I am simply trying to use this openCV function: createFisherFaceRecognizer()

As can be seen here in the docs(http://docs.opencv.org/3.1.0/da/d60/tutorial_face_main.html) the correct way to use this function is as follows:

Ptr<BasicFaceRecognizer> model = createFisherFaceRecognizer();

Some other places in the docs claim that the function needs two parameters(http://www.docs.opencv.org/3.0-rc1/db/d7c/group__face.html#ga4cd9f632dce63aeff7cfb7738f80523c):

 Ptr<BasicFaceRecognizer> cv::face::createFisherFaceRecognizer ( int num_components = 0, double threshold = DBL_MAX)

Unfortunately nothing works! Does anybody know what the issue could be?

This is my current code:

  #include <iostream>
  #include <fstream>
  #include <sstream>
  #include <string>
  #include <opencv2/opencv.hpp>
  #include "opencv2/core.hpp"
  #include "opencv2/face.hpp"
  #include "opencv2/highgui.hpp"
  #include "include/faceDetection.h"

  using namespace std;
  using namespace cv;

  int main(int argc, char** argv)
  {
      VideoCapture cap(CV_CAP_ANY);
      Mat imgFrame;
      Mat face;
      vector<Mat> facesImgFrame;

      faceDetection faceDetectionObj;

      if( !cap.isOpened() )
      {
          cout << "Could not initialize capturing...\n";
          return 0;
      }

      CascadeClassifier faceCascade;
      if(!faceCascade.load("haarcascade_frontalface_alt.xml"))
      {
          cerr<<"error when loading xml file for face"<<endl;
          exit(1);
      }
      CascadeClassifier eyes_cascade;
      if(!eyes_cascade.load("haarcascade_eye_tree_eyeglasses.xml"))
      {
          cerr<<"error when loading xml file for eyes"<<endl;
          exit(1);
      }
      cerr<<"loaded XML file"<<endl;
      vector<Mat> trainImages;
      vector<int> labelsTrainImages;
      string fn_csv = string("/home/Desktop/myCSVFile");
              try {
              read_csv(fn_csv, trainImages, labelsTrainImages);
          } catch (cv::Exception& e) {
              cerr << "Error opening file \"" << fn_csv << "\". Reason: " << e.msg << endl;
              exit(1);
          }

     // NONE OF THOSE WORKS
      //Ptr<face::FaceRecognizer> model = face::createLBPHFaceRecognizer(1,1,1,1,1);
      Ptr<face::FaceRecognizer> model = face::createFisherFaceRecognizer();
      //Ptr<face::BasicFaceRecognizer> model = face::createFisherFaceRecognizer();
      //static Ptr<face::FisherFaceRecognizer> model = create(0, DBL_MAX);

      model->train(trainImages, labelsTrainImages);


      while(1)
      {
          cap >> imgFrame;
          imshow("imgFrame", imgFrame);
          char c = (char)waitKey(10);
          facesImgFrame = faceDetectionObj.detectAndDisplay(imgFrame, faceCascade, eyes_cascade);
          if(!facesImgFrame.empty())
          for(int i=0;i<facesImgFrame.size();i++)
          {
              string windowName = "face "+ tostr(i);
              namedWindow( windowName, WINDOW_AUTOSIZE );
              imshow(windowName, facesImgFrame.at(i));
              int labelPerson = model->predict(facesImgFrame.at(i));
              cerr<<"labePerson: "<<labelPerson<<endl;
          }
          cerr<<"number of detected faces: "<<facesImgFrame.size()<<endl;
          facesImgFrame.clear();
      }

      return 0;

  }

EDIT 3:

I tried 2 thing that have been suggested:

1) cv::face::createFisherFaceRecognizer(int, double), but this gives:

main.cpp:(.text+0x6a8): undefined reference to`cv::face::createFisherFaceRecognizer(int, double)'

2)face::FisherFaceRecognizer::create(), but this gives:

 error: ‘cv::face::FisherFaceRecognizer’ has not been declared

None of what I was suggested so far works, what would be a solution?