Forward declaration issue (error: previous declaration of 'tst' was here)

Baurzhan Ismagulov ibr@radix50.net
Sun Nov 30 12:06:00 GMT 2008


On Sun, Nov 30, 2008 at 12:03:05AM -0800, Hani Ayoub wrote:
> tst.h
> =======
> typedef struct _tst{
...
> } tst;

> tst2.h
> =======
> #include "tst.h"
> typedef struct _tst tst;
> 
> int foo(tst t);

> tst.c
> =======
> #include <stdio.h>
> #include "tst2.h"
> 
> int foo(tst t){ return 1; };
...

> when compiling: "gcc tst.c tst2.h tst.h" I get the following errors:
...
> The problem is that "tst" is redefined... but I cannot change "tst.h"
> file... 

So, what about:

* Removing the typedef from tst2.h -- "tst" is already typedefed in
  tst.h.

* Compiling tst.c only, not the headers.

With kind regards,
-- 
Baurzhan Ismagulov
http://www.kz-easy.com/



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