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02-22-2008, 12:40 PM
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 Re: #ifndef lint On Sun, Aug 27, 2006 at 04:38:00PM +0300, Paul Irofti wrote: > I remember seeing a comment regarding the topic a few days ago on a > patch. But I can't seem to find it in the archive. > > Anyways, I was browsing through the /usr/src and noticed that most c > files begin with something like: > > #ifndef lint > static char copyright[] = > "@(#) Copyright (c) 1989, 1993\n\ > The Regents of the University of California. All rights reserved.\n"; > #endif /* not lint */ This embeds the string in the final executable, so that strings(1) can find it; however, lint(1) rightly complains that the string will never be used. > #ifndef lint > #if 0 > static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95"; > #else > static char rcsid[] = "$OpenBSD: cat.c,v 1.17 2005/04/05 01:18:53 jaredy > Exp $"; > #endif > #endif /* not lint */ > > > My question is why is this used twice? and not in a single #ifndef? I suppose the point is to preserve the old Berkeley SCCS tag, while still allowing the above (SCCS is a version control system much like RCS; but where RCS evolved into CVS, SCCS isn't used a lot nowadays). Joachim      |
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