undefined reference to Class::method C++

Question

I got a problem compiling the source that follows:

    QString code = this->viewManager()->activeView()->document()->text();
    Qualifier qua;
    qua.setQCode(code);

It tells me that

error: undefined reference to `Qualifier::setQCode(QString)'

the code of the qualifier.h and .cpp follows

#ifndef __QUALIFIER_H__
#define __QUALIFIER_H__

#include <iostream>
#include <string>
#include <QString>
#include <queue>
#include "analyser.h"



using namespace std;



class Qualifier
{

private:

    string code;
    queue<method> tokenisedCode;
    //queue<analysis> analysedCode;

void tokeniseCode();

public :


void setCode(string code);

void setQCode(QString code);

void computeLocAnalysis();

void computeCCAnalysis();

void visualiseResults();


};

 #endif /* __QUALIFIER_H__ */

and the CPP is

#include "qualifier.h"

using namespace std;


void Qualifier::tokeniseCode()
{

Parser par;
par.setCode(code);
par.parse();
this->tokenisedCode = par.getMethods();

}

void Qualifier::setCode(string code)
{
    this->code = code;
}

void Qualifier::setQCode(QString code)
{
this->code = qPrintable(code);
}

void Qualifier::computeLocAnalysis()
{

std::cout << this->code << std::endl;

/*
locAnalyser ana = new locAnalyser();
ana.setMethodList(tokenisedCode);
ana.computeResult();
this->analysedCode = ana.getResult();
*/
 }

void Qualifier::computeCCAnalysis()
{

// To be implemented;

 }

void Qualifier::visualiseResults()
{
/*
//Need a grapher of the results
while(!analysedCode.empty())
{
    analysis meth = analysedCode.front();
    cout << "LOC: " << meth.result << "\t\t" << meth.name << endl;
    analysedCode.pop();
    cout << "------------------------------------" << endl;
}
*/
}

I do not understand why the reference is not seen! I mean, is the exact thing, the same way that is done in the rest of the project!

Do you get the same error for `tokeniseCode()`? If so, your cpp file probably isn't being seen. — chris, May 09 '12 at 13:03
[Never use `using namespace ...` in a header file](http://stackoverflow.com/questions/5849457/using-namespace-in-c-headers). — Oliver Charlesworth, May 09 '12 at 13:04
Yes, every method of the object Qualifier that I am going to use, generates the same error: undefined reference Qualifier::name_method. — user1384636, May 09 '12 at 13:06
Does "and so on" include the definition of the method the compiler is complaining about? if so, you should probably include it to avoid confusion. — juanchopanza, May 09 '12 at 13:06
I've eliminated the namespace in the header file. No changes, same error. — user1384636, May 09 '12 at 13:08
it includes the methods' implementation of the declarations in the header file... — user1384636, May 09 '12 at 13:09
well, obviously not, because the compiler is complaining, so please post some code that reproduces the error. — juanchopanza, May 09 '12 at 13:12
Sorry, I've cut half of the code without see that the setQCode was not there. — user1384636, May 09 '12 at 13:15

score 6 · Answer 1 · answered May 09 '12 at 13:06

6

According to the header file you have 2 different implementations of similar functions:

void setCode(string code);

void setQCode(QString code);

But in the .cpp you only implement the first:

void Qualifier::setCode(string code)
{
    this->code = code;
}

Therefore the compiler complains about the missing setQCode().

Solution: either implement it or remove it's definition from the header file.

answered May 09 '12 at 13:06

karlphillip

92,053
36
243
426

done. there was the implementation, just it was not in this post. Now there is and the problem persists.... – user1384636 May 09 '12 at 13:18
How many source files do you have in this project? It may be simply that they are not being linked appropriately. – karlphillip May 09 '12 at 13:22
It is an open source project, Kate of KDE. I must add a feature, thus I simple added a folder in the project and the added files – user1384636 May 09 '12 at 13:29
It seems you need to edit the configuration files that are used to build the project and add the filenames of the sources you created :) – karlphillip May 09 '12 at 14:10

score 0 · Answer 2 · answered May 09 '12 at 13:07

0

You didn't show us yout implementation of Qualifier::setQCode(QString) in .cpp file.

Maybe the argument from implementation cpp file does not match the argument of prototype from header file.

answered May 09 '12 at 13:07

gal

16
1

score 0 · Answer 3 · answered May 09 '12 at 13:07

0

You have 2 functions

void setCode(string code);

void setQCode(QString code);

May you've forgotten to implement setQCode??

answered May 09 '12 at 13:07

m8labs

3,671
2
30
32

score 0 · Answer 4 · answered May 09 '12 at 13:52

0

This is reported by linker, isn't it? I looks like the particular translation unit or library containing definition of 'Qualifier' class is not included in linking process.

answered May 09 '12 at 13:52

Przemyslaw Szymanski

1

undefined reference to Class::method C++

4 Answers4