makefile problem

Hello!

Im quite new to C programming, especially with makefiles. I've read many posts but still i cant compile my program. I'm running Gentoo Linux with newest GCC. I have three files: fb.h, fb.c and main.c. Make properly makes main.o and fb.o but while linking says that that arrayofpixels is already defined in main.o and there is multiple definition in fb.o

main.c:

Code:

---

#include "fb.h"
void main()
{
  fbInit();
  arrayofpixels[x+y*w]=somecolour;
  fbDeinit();
}

---

fb.h:

Code:

---

#ifndef __MYFB_H_
#define __MYFB_H_
#include <linux/fb.h> // this is system wide framebuffer-device definition file
char *arrayofpixels;
void fbInit();
void fbDeinit();
#endif

---

fb.c:

Code:

---

#include <linux/fb.h> // this is system wide framebuffer-device definition file
#include "fb.h"

void fbInit()
{
// init stuff and allocate memory for array of pixels
}

void fbDeinit()
{
// undo everything
}

---

In the .h file, you should have
extern char *arrayofpixels;

In ONE .c file, you should have
char *arrayofpixels;

Finally, main returns an int, not void.

thanks! i got it working

and *arrayofpixels doesnt point to anything.