Erreur multiple definition

Bonsoir,

Dans mon programme il ya le fichier header suivant :

#ifndef __FILE_MESSAGES_H__
#define __FILE_MESSAGES_H__

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>


typedef enum {
 BATEAU_DECH,
 BATEAU_CHAR,
 TRAIN_DECH,
 TRAIN_CHAR,
 CAMION_DECH,
 CAMION_CHAR
} TYPE ;


typedef struct {
 long type;
 int pid;
 int nb_conteneurs; 
}demande_quai;


typedef struct {
 long type;
 int portique1[2];
 int portique2[2]; 
}reponse_quai;

typedef struct {
 long type;
 int pid;
 int nb_conteneurs; 
}demande_portique;

typedef struct {
 long type;
 int nb_cont_restants;
}reponse_portique;

int tailleDemandeQuai = sizeof(demande_quai)-sizeof(long);
int tailleReponseQuai = sizeof(reponse_quai)-sizeof(long);
int tailleDemandePortique = sizeof(demande_portique)-sizeof(long);
int tailleReponsePortique = sizeof(demande_portique)-sizeof(long);

void erreur(const char * msg) ;
int init_file_message(void);
void supprimer_file(int msgid);

#endif

qui est inclus dans plusieurs autres fichiers headers comme celui-ci :

#ifndef __VEHICULE_H__
#define __VEHICULE_H__


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <time.h>

#include "file_messages.h"

#define TAILLE_BAT 7
#define TAILLE_TRAIN 10
#define TAILLE_CAM 1



void creer_demande_quai(demande_quai *dem_q,int type, int nb_cont);
void creer_demande_portique(demande_portique *dem_p,TYPE type, int pid, int nb_cont);
int vehicule(int msgid_quai,TYPE type);


#endif

Dont les fichiers .c correspondant utilisent les variables tailleDemandeetc définies dans le premiers fichier header ci dessus.

A la compilation j'ai cette erreur :

/usr/bin/ld: /tmp/ccgKSpWC.o:(.data+0x0): multiple definition of `tailleDemandeQuai'; /tmp/ccBivDIA.o:(.data+0x0): first defined here
/usr/bin/ld: /tmp/ccgKSpWC.o:(.data+0x4): multiple definition of `tailleReponseQuai'; /tmp/ccBivDIA.o:(.data+0x4): first defined here
/usr/bin/ld: /tmp/ccgKSpWC.o:(.data+0x8): multiple definition of `tailleDemandePortique'; /tmp/ccBivDIA.o:(.data+0x8): first defined here
/usr/bin/ld: /tmp/ccgKSpWC.o:(.data+0xc): multiple definition of `tailleReponsePortique'; /tmp/ccBivDIA.o:(.data+0xc): first defined here
/usr/bin/ld: /tmp/ccgjIMWA.o:(.data+0x0): multiple definition of `tailleDemandeQuai'; /tmp/ccBivDIA.o:(.data+0x0): first defined here
/usr/bin/ld: /tmp/ccgjIMWA.o:(.data+0x4): multiple definition of `tailleReponseQuai'; /tmp/ccBivDIA.o:(.data+0x4): first defined here
/usr/bin/ld: /tmp/ccgjIMWA.o:(.data+0x8): multiple definition of `tailleDemandePortique'; /tmp/ccBivDIA.o:(.data+0x8): first defined here
/usr/bin/ld: /tmp/ccgjIMWA.o:(.data+0xc): multiple definition of `tailleReponsePortique'; /tmp/ccBivDIA.o:(.data+0xc): first defined here
/usr/bin/ld: /tmp/ccgjIMWA.o: in function `erreur':
main.c:(.text+0x0): multiple definition of `erreur'; /tmp/ccBivDIA.o:file_messages.c:(.text+0x0): first defined here
/usr/bin/ld: /tmp/ccgSl8NB.o:(.data+0x0): multiple definition of `tailleDemandeQuai'; /tmp/ccBivDIA.o:(.data+0x0): first defined here
/usr/bin/ld: /tmp/ccgSl8NB.o:(.data+0x4): multiple definition of `tailleReponseQuai'; /tmp/ccBivDIA.o:(.data+0x4): first defined here
/usr/bin/ld: /tmp/ccgSl8NB.o:(.data+0x8): multiple definition of `tailleDemandePortique'; /tmp/ccBivDIA.o:(.data+0x8): first defined here
/usr/bin/ld: /tmp/ccgSl8NB.o:(.data+0xc): multiple definition of `tailleReponsePortique'; /tmp/ccBivDIA.o:(.data+0xc): first defined here
/usr/bin/ld: /tmp/ccDpXFrA.o:(.data+0x0): multiple definition of `tailleDemandeQuai'; /tmp/ccBivDIA.o:(.data+0x0): first defined here
/usr/bin/ld: /tmp/ccDpXFrA.o:(.data+0x4): multiple definition of `tailleReponseQuai'; /tmp/ccBivDIA.o:(.data+0x4): first defined here
/usr/bin/ld: /tmp/ccDpXFrA.o:(.data+0x8): multiple definition of `tailleDemandePortique'; /tmp/ccBivDIA.o:(.data+0x8): first defined here
/usr/bin/ld: /tmp/ccDpXFrA.o:(.data+0xc): multiple definition of `tailleReponsePortique'; /tmp/ccBivDIA.o:(.data+0xc): first defined here
/usr/bin/ld: /tmp/ccszUInB.o:(.data+0x0): multiple definition of `tailleDemandeQuai'; /tmp/ccBivDIA.o:(.data+0x0): first defined here
/usr/bin/ld: /tmp/ccszUInB.o:(.data+0x4): multiple definition of `tailleReponseQuai'; /tmp/ccBivDIA.o:(.data+0x4): first defined here
/usr/bin/ld: /tmp/ccszUInB.o:(.data+0x8): multiple definition of `tailleDemandePortique'; /tmp/ccBivDIA.o:(.data+0x8): first defined here
/usr/bin/ld: /tmp/ccszUInB.o:(.data+0xc): multiple definition of `tailleReponsePortique'; /tmp/ccBivDIA.o:(.data+0xc): first defined here

Si quelqu'un a une idée je suis preneur

Bonne soirée