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From: random@bubblescope.net
To: gerritvn@gpvno.co.za
Cc: gcc-help@gcc.gnu.org
Subject: Re: Single line conditional compiles
Date: Thu, 28 Jul 2005 16:08:00 -0000	[thread overview]
Message-ID: <42E902B3.9010907@bubblescope.net> (raw)
In-Reply-To: <42E91D4D.22097.1B3092F9@localhost>

Gerrit van Niekerk wrote:

>How can one implement single line conditional compile macros with GCC? 
>
>Instead of having:
>
>#ifdef OPT1
><valid C line>
>#endif
>
>Having something like:
>IFOPT1 <valid C line>
>
>The following works with BorlandC, but not GCC:
>
>#ifdef OPT1
>#define IFOPT1
>#else
>#define IFOPT1 /##/
>#endif
>
>I understand why it does not work - I am looking for a solution, not an 
>explanation :)
>
>  
>
Not quite what you are looking for, but how about?

#ifdef OPT1
#define IFOPT1(x) x
#else
#define IFOPT1(x)
#endif

Then you write
IFOPT1(stuff)

This has the advantage you can write it mid-line, with stuff before and
after it.

Chris

  reply	other threads:[~2005-07-28 16:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-07-28 16:02 Gerrit van Niekerk
2005-07-28 16:08 ` random [this message]
2005-07-28 19:51   ` Gerrit van Niekerk
2005-07-28 16:16 ` Eljay Love-Jensen

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