How do I create a global fxn prototype?

[godofcode]

Labwindows is complaining I don't have a function prototype for one of my external functions.  It's created in a separate file in the project.  Here's an exmaple of the problem I'm having.

main.c

#include "file.h"

int main()

{

     file_fxn();// Shows an error on this line saying no prototype.

     return 0;

}

file.h

#ifndef FILE_H

#define FILE_H 

void file_fxn();

#endif

file.c

#include "file.h" 

void file_fxn() {}

[msaxon]

You can't have an empty argument list in a prototype, you should have:

file.h

#ifndef FILE_H

#define FILE_H 

void file_fxn(void);

#endif