Re: [Tinycc-devel] cached header files cause multi-includes to fail

[Simon Lehmayr]

Hi,

the project works this way:

ee.c:
--------
...
#include "ee.h"
...
--------
ee.h:
--------
#ifndef ...
#define ...

#include "ee_cfg.h"
...
enum blabla
{
#define CFG1
#include "ee_cfg.h"
EE_MAX_E
};
...
--------
And thus the following includes are just ignored

Greetings,
Simon

----- Original Message ----- 
From: "grischka" <address@hidden>
To: <address@hidden>
Sent: Thursday, July 09, 2009 11:18 AM
Subject: Re: [Tinycc-devel] cached header files cause multi-includes to fail


> Simon Lehmayr wrote:
> > Hi,
> >  I found an error in tcc while compiling a project which uses one header 
> > that includes another header several times using defines to generate 
> > different code.
> > Caching of headers hides the following includes thus no code is generated 
> > in these cases.
> > I disabled caching by returning NULL in the cache check.
> > Caching should include the environmental state (defines, etc) to avoid 
> > this problem.
>
> There is some state included, that is headers are skipped only if there is
> an #ifndef macro around, such as:
>
> #ifndef FOO_H
> #define FOO_H
> ...
> #endif
>
> And the ifdef must be the first thing and the endif must be the last.
>
> I'm not sure how this can not work but maybe you can tell more details.
> Also you could compile TCC with INC_DEBUG (at tcc.h:79).
>
> >  Greetings,
> > Simon
>
>
>
>
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