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From: herndon@umn-cs.UUCP (Robert Herndon)
Newsgroups: comp.lang.c
Subject: Re: cpp macro expansion
Message-ID: <1494@umn-cs.UUCP>
Date: Fri, 17-Apr-87 14:26:51 EST
Article-I.D.: umn-cs.1494
Posted: Fri Apr 17 14:26:51 1987
Date-Received: Sun, 19-Apr-87 13:06:04 EST
Organization: University of Minnesota, Minneapolis
Lines: 17
Summary: #define CONCAT

In article <2857@linus.UUCP>, ms@security.uucp (Mistress Account) writes:
> #define	MACRO(first,last)	(\
> first\
> _\
> last)
> The intent of the developers was that when cpp expands the code, the two
> macro arguments would be concatenated together into one token for the
> compiler, i.e:	MACRO(holy,cow) yields (holy_cow).

Try:
#define	CONCAT(first,last) first/**/_/**/last

I think this has worked for me on various suns -- the preprocessor
does the expansion, stripping out the comments in the definition,
leaving no spaces.

				Robert Herndon