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From: bright@dataio.UUCP
Newsgroups: net.sources
Subject: Re: ifdef filter
Message-ID: <1047@dataio.UUCP>
Date: Sat, 19-Jul-86 17:21:19 EDT
Article-I.D.: dataio.1047
Posted: Sat Jul 19 17:21:19 1986
Date-Received: Mon, 21-Jul-86 03:09:24 EDT
References: <323@enmasse.UUCP>
Reply-To: bright@dataio.UUCP (Walter Bright
Organization: Data I/O Corp., Redmond WA
Lines: 10

In article <323@enmasse.UUCP> keith@enmasse.UUCP (Keith Crews) writes:
>It often happens that software packages are set up to run on so many
>configurations that it is hard to read the code because of all the ifdefs.
>That is, filter out everything that is not going to be expanded by cpp while
>retaining the ifdefs that are going to be expanded, just for comment value.
>Ideally the output, when compiled, would produce exactly the same results as the
>original.  Does anyone have anything like this?

The Datalight C compiler does this if you use the -e and -l switches
on the command line.