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From: ken@turtlevax.UUCP (Ken Turkowski)
Newsgroups: net.unix-wizards
Subject: C preprocessor: documentation and use outside of the C compiler
Message-ID: <580@turtlevax.UUCP>
Date: Fri, 9-Nov-84 12:34:20 EST
Article-I.D.: turtleva.580
Posted: Fri Nov  9 12:34:20 1984
Date-Received: Sat, 10-Nov-84 10:14:00 EST
Distribution: net
Organization: CADLINC, Inc. @ Palo Alto, CA
Lines: 16

Is there any documentation anywhere about the C preprocessor, or does
one need to read through the source code to find out how to use it
outside of the C compiler?  I'm on a 4.2bsd UNIX system, if that makes
any difference.

One of the things that I'd like to do is to run the preprocessor on a
file, recognizing #ifdefs and including those files that would get
included based on the status of #define'ed variables, but I do not want
to make the macro substitutions in the resultant output.

In other words, I'd just like to conditionally unroll the #include's,
without touching the #defines.  Can the C preprocessor do this?
-- 
Ken Turkowski @ CADLINC, Palo Alto, CA
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