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Date:      Thu, 28 Jan 1999 05:12:24 -0500 (EST)
From:      Peter Dufault <dufault@hda.com>
To:        nate@mt.sri.com (Nate Williams)
Cc:        dillon@apollo.backplane.com, nate@mt.sri.com, archie@whistle.com, wollman@khavrinen.lcs.mit.edu, current@FreeBSD.ORG
Subject:   Re: btokup() macro in sys/malloc.h
Message-ID:  <199901281012.FAA10811@hda.hda.com>
In-Reply-To: <199901280629.XAA26798@mt.sri.com> from Nate Williams at "Jan 27, 99 11:29:37 pm"

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> A warning is just that.  It's not an error, so don't treat it like one.

I use different productions to enable different warnings on code with
different histories.  For one thing, new revs of the compiler will
otherwise cause trouble when the warning behavior changes.

I also use -Werror.  Eliminating warnings is almost pointless without
this.  And yeah, I have a NO_WERROR flag for when I'm in a rush.
I know -Werror is the eventual goal.

So I disagree with Nate about ignoring warnings you've enabled -
it is too easy to ignore a new problem.  I agree with him that
gratuitous casts and similar fixes during damn-the-torpedos
mass conversions of large bodies of code are bad in that they
can effectively hide latent problems more deeply than they were
hidden before such a conversion.

So IMHO:

Eliminating warnings is good;

Any mechanistic change to eliminate warnings
that can mask problems can not be used.

Peter

-- 
Peter Dufault (dufault@hda.com)   Realtime development, Machine control,
HD Associates, Inc.               Safety critical systems, Agency approval

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