Re: How to get a literal #undef into config.h

[Bruce Korb]

Keith Marshall wrote:
> On Tuesday 25 October 2005 3:45 pm, Brian wrote:
>
> > Great thanks for the tips. I see its a bit chicken and egg, but is there a
> > reason config.h couldn't just define HAVE_CONFIG_H?
>
>
> Because your source file is expected to use logic like this:--
>
>   #ifdef  HAVE_CONFIG_H
>   #include "config.h"
>   #endif
>
> so if it isn't defined on the command line, config.h will never get the 
> chance to define *anything*.

OTOH, if your project flat won't work on any platform without config.h:

  #ifndef HAVE_CONFIG_H
  #define HAVE_CONFIG_H 1
  #endif
  #include "config.h"  // include it or die trying, instead of some obtuse
                       // error stemming from incorrect data declarations

:-)