'undefined reference to .... :: .... ' Problem with Ubuntu and QT

[eldiablo1983]

Hello,
I've been looking for a solution to my problem for a while, but none of the given solutions worked, so I decided to ask myself.

The only fault I get is ":-1: error: collect2: ld returned 1 exit status".
But "/TestApplication/sample/mainwindow.cpp:52: undefined reference to `HoGDetector::HoGDetector(int)'" makes me assume that it is an inclusion-Problem.

(i reduced the code, so I would still get the same problem, but i left all the includes)

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <string>
#include <iostream>
#include <fstream>
#include <detection.h>
#include <detector.h>
#include <HoGDetector.h>
#include <VJDetector.h>
#include "im/data.h"
#include "im/io.h"
//#include <postprocess.h>
#include <stdio.h>
 
using namespace std;
 
#ifdef TIME
    extern "C"{
    #include "rs/time.h"
    }
#endif
 
    HoGDetector* detector;
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
 
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::changeEvent(QEvent *e)
{
    QMainWindow::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
    int verbosity = 1;
    HoGDetector* detector = new HoGDetector(verbosity);
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <string>
#include <iostream>
#include <fstream>
#include <detection.h>
#include <detector.h>
#include <HoGDetector.h>
#include <VJDetector.h>
#include "im/data.h"
#include "im/io.h"
//#include <postprocess.h>
#include <stdio.h>

using namespace std;

#ifdef TIME
    extern "C"{
    #include "rs/time.h"
    }
#endif

    HoGDetector* detector;

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);


}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::changeEvent(QEvent *e)
{
    QMainWindow::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
    int verbosity = 1;
    HoGDetector* detector = new HoGDetector(verbosity);
}

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mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <string>
#include <detection.h>
#include <detector.h>
#include <HoGDetector.h>
#include <VJDetector.h>
#include <postprocess.h>
 
namespace Ui {
    class MainWindow;
}
 
class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
protected:
    void changeEvent(QEvent *e);
 
private:
    Ui::MainWindow *ui;
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <string>
#include <detection.h>
#include <detector.h>
#include <HoGDetector.h>
#include <VJDetector.h>
#include <postprocess.h>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void changeEvent(QEvent *e);

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

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sample.pro

TARGET = TestApplication
TEMPLATE = app
SOURCES += main.cpp \
    mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
INCLUDEPATH += /vol/opencv/include \
    /vol/is/include \
    /vol/is/contrib/include \
    /vol/esmeralda/include \
    /vol/is/contrib/include/ml \
    /vol/is/contrib/include/iul
LIBS += -L/vol/opencv/lib \
    -L/vol/is/lib \
    -L/vol/is/contrib/lib \
    -L/vol/esmeralda/lib \
    -L/vol/is/contrib/lib/ml/lib \
    -L/vol/is/contrib/lib/iul \
    -lcxcore \
    -lcv \
    -lhighgui \
    -lcvaux \
    -lim \
    -lmx \
    -lrs \
    -lz \
    -lm \
    -ldl \
    -lpthread \
    -lImageUtilityLibrary \
    -lMathLibrary \
    -lfloatfann \
    -lhistogram \
    -lmeanshift

TARGET = TestApplication
TEMPLATE = app
SOURCES += main.cpp \
    mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
INCLUDEPATH += /vol/opencv/include \
    /vol/is/include \
    /vol/is/contrib/include \
    /vol/esmeralda/include \
    /vol/is/contrib/include/ml \
    /vol/is/contrib/include/iul
LIBS += -L/vol/opencv/lib \
    -L/vol/is/lib \
    -L/vol/is/contrib/lib \
    -L/vol/esmeralda/lib \
    -L/vol/is/contrib/lib/ml/lib \
    -L/vol/is/contrib/lib/iul \
    -lcxcore \
    -lcv \
    -lhighgui \
    -lcvaux \
    -lim \
    -lmx \
    -lrs \
    -lz \
    -lm \
    -ldl \
    -lpthread \
    -lImageUtilityLibrary \
    -lMathLibrary \
    -lfloatfann \
    -lhistogram \
    -lmeanshift

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i also used the bashrc-file using:

" source ~/.bashrc "
and checked with echo $LD_LIBRARY_PATH that all the necessary paths were included
"/vol/opencv/lib:/vol/qt/lib:/export/usr/share/jre/1.5/lib/i386/:/vol/esmeralda/lib:/vol/is/contrib/lib:/vol/is/lib:/export/usr/lib:/vol/robot/share/MetraLabs/tmp/opt/MetraLabs/lib:"

The file HoGDetect.h is in the folder: "/vol/is/contrib"

As I am new to Qt, C++ and Linux this is giving me headaches.
I really hope I did not forget anything important.

Thank you for your advices in advance

[squidge]

No HoGDetect.cpp or is everything in HoGDetect.h?

[SixDegrees]

It isn't an include problem - the error indicates that the problem is occuring during linkage, not compilation. So whatever library contains your HoGDetector class is either not being found, or it doesn't contain a constructor that takes an int as an argument.