CodeBlocks

Bonjour,

je fais maintenant un petit programme avec gnu C sous CodeBlocks. le code est le suivant:
fichier header.h:

#define CHECK_FORMAT __attribute__ ((format1 (printf, 1, 2)))

extern void eprintf(const char *format1, ...) CHECK_FORMAT;

fichier Untitled1.c:
#include <stdio.h>
#include <stdarg.h>
#include "header.h"


void foo()
{
eprintf("file %s does not exist\n", "file"); /* error on this line */


printf("n=%d,%d,%d\n", 1, 2, 3);
}

int main(int argc, char** argv)
{
foo();
return 0;
}

Sous codeBlocks le compiler me fait une erreur qui est la suivante:

mingw32-gcc.exe -O -Wall -ansi -g -c "C:\Documents and Settings\Mohamed\Bureau\Untitled1.c" -o "C:\Documents and Settings\Mohamed\Bureau\Untitled1.o"
In file included from C:\Documents and Settings\Mohamed\Bureau\Untitled1.c:3:0:
C:\Documents and Settings\Mohamed\Bureau\header.h:3:1: warning: 'format1' attribute directive ignored [-Wattributes]
mingw32-g++.exe -o "C:\Documents and Settings\Mohamed\Bureau\Untitled1.exe" "C:\Documents and Settings\Mohamed\Bureau\Untitled1.o"
C:\Documents and Settings\Mohamed\Bureau\Untitled1.o: In function 'foo':
C:/Documents and Settings/Mohamed/Bureau/Untitled1.c:8: undefined reference to 'eprintf'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 0 seconds)
1 errors, 1 warnings (0 minutes, 0 seconds)

Merci bien