Re: Predefining __OS_DOS__

[Peter Gerwinski <peter at gerwinski dot de>]

Jeffrey A Law wrote:
> 
> You say it is important to Pascal -- why?  Seems to me that is this purely
> a target issue, why does Pascal about defining __OS_DOS__ for the target?
> 
> I'd actually recommend programmers use the specific case they care about.

Up to now, `MSDOS', `_WIN32' and `__EMX__' always occured in
this combination in the GPC project.  Sometimes someone forgot
one (or two) of them and caused unpleasant bugs.  I don't know,
but I can imagine that similar things have happened in the C
world, too.

> If they want a #define for generic dos-like stuff, they can always add
> 
> #if defined (MSDOS) || defined (_WIN32) || defined (__EMX__)
> #define __OS_DOS__
> #endif

This is confusing for Pascal programmers since there is no
symbol `||' in Pascal.

> To one of their common header files.

There are no header files in Pascal.  One would have to add this
to each source file.

    Peter