Re: [Dev-C++] Multiply-included header problem

[Per W. <pw...@ia...>]

But that's not what FerretallicA wanted.

He tried to implement

main.h:
  #ifndef _MAIN_H_
  ...

  #if INSTANTIATE_GLOBALS
  #define GLOBAL
  #else
  #define GLOBAL extern
  #endif

  GLOBAL int some_important_variable;

  #endif _MAIN_H_


main.cpp:
  #define INSTANTIATE_GLOBALS
  #include "main.h"  // Instantiate needed global variables.

extrafunctions.cpp:
  #include "main.h"  // Just thell what global variables are available.

Renaming PRAGMAONCE to _MAIN_H would still result in all source files
including main.h getting a copy of the global variable.

/Per W

On Sun, 27 Jul 2003, OROSZI Bal=E1zs wrote:

> FerretallicA wrote:
> > Oo oi,
> >
> > OK got it working... I tried the following code and it made no differen=
ce,
> > but I tried doing a clean build and now it's worked. The solution is ba=
sic,
> > but here it is anyway for those who might run into this problem at some
> > point.
> >
> > MAIN.H
> > #ifndef PRAGMAONCE
> > #define PRAGMAONCE
> > int some_important_variable;
> > #endif
> >
> >
> > PRAGMAONCE can be renamed to whatever you feel like if you really want.
>
> It actually SHOULD be renamed, and it should also be unique in each
> header file. Because if not, some header files will not be included.
> So I suggest, you name it something like this:
>
> #ifndef _MAIN_H_
> #define _MAIN_H_
> int some_important_variable;
> #endif
>
> --
> Greetings,
>    Bal=E1zs
>
>
>
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