About to commit suicide - Linker error

[bereng]

Hi,

I must have hit my head real hard sometime these days as after starting to use a redhat 9 machine I cannot link a stupid c++ project. I've spent 3 days googling down to results page 20 and used severeal other search engines. I am desperate!

Any help highly appreciated:

 cfg.cpp: 
#include <iostream>
#include "Cfg.h"
 
Cfg::Cfg()
{
    int i=0;
}
-------------
Cfg.h:
#ifndef CFG_H
#define CFG_H
 
class Cfg
{
public:
 
    Cfg();
 
};
 
#endif
-------------
DAO.cpp:
#include "Cfg.h"
#include "DAO.h"
using namespace std;
 
DAO::DAO( )
{
    int i=0;
}
-------------
DAO.h:
#ifndef DAO_H
#define DAO_H
 
#include "Cfg.h"
class DAO
{
public:
 
    explicit DAO();
 
};
 
#endif
-------------
DBHelper.cpp:
#include "Cfg.h"
#include "DAO.h"
#include "DBHelper.h"
using namespace std;
 
DBHelper::DBHelper()
{
    int i=0;
}
---------------
DBHelper.h
#ifndef DBHELPER_H
#define DBHELPER_H
 
#include "Cfg.h"
using namespace std;
 
class DBHelper
{
public:
 
    explicit DBHelper();
 
};
 
#endif
-----------------
proba.c
#include <iostream>
using namespace std;
#include "DAO.cpp"
 
int main (void)
{
cout<<"Hello world";
}
 
-----------------
 

This is madness for me:

- g++ -c fileX.cpp: Each file produces it's .o without problems
- 'g++ -o proba DAO.o Cfg.o DBHelper.o proba.o' produces:

 [cc] 0 total files to be compiled. 
[cc] Starting link
[cc] bin/proba.o(.text+0x0): In function `DAO::DAO[not-in-charge]()':
[cc] /home/bereng/probaLinker/lib/DAO.cpp:6: multiple definition of `DAO::DAO[not-in-charge]()'
[cc] bin/lib/DAO.o(.text+0x0):/home/bereng/probaLinker/lib/DAO.cpp:6: first defined here
[cc] bin/proba.o(.text+0x10): In function `DAO::DAO[in-charge]()':
[cc] /home/bereng/probaLinker/lib/DAO.cpp:6: multiple definition of `DAO::DAO[in-charge]()'
[cc] bin/lib/DAO.o(.text+0x10):/home/bereng/probaLinker/lib/DAO.cpp:6: first defined here
[cc] collect2: ld returned 1 exit status
 

HELP! PLEASE!

[Banfa]

In proba.cpp

#include <iostream>
using namespace std;
#include "DAO.cpp"
 

surely that should be

#include <iostream>
using namespace std;
#include "DAO.h"