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Date: Sun, 1 Jun 1997 22:31:18 +0200
From: j@uriah.heep.sax.de (J Wunsch)
To: freebsd-current@FreeBSD.ORG
Subject: Re: ucd-snmp-3.1.3 doesn't like FreeBSD3?
References: <199706010818.BAA14119@rah.star-gate.com> <17191.865192920@orion.webspan.net>
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Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
In-Reply-To: <17191.865192920@orion.webspan.net>; from Gary Palmer on Jun 1, 1997 15:22:00 -0400
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As Gary Palmer wrote:

> > cc -I.. -O2 -pipe -Dfreebsd3 -c md5.c
> > md5.c: In function `MDblock':
> > md5.c:157: warning: decimal constant is so large that it is unsigned
> > md5.c:158: warning: decimal constant is so large that it is unsigned

> Those warnings have been there since day one. I have no idea if they
> mean anything or not

They simply mean someone defined a constant that would have the sign
bit set, but it wasn't declared to be a negative constant.  You could
supposedly get around this by appending a `U' to the constant (thus
indicating to the compiler that it is really meant to be unsigned).

Seems gcc does already believe into the good intentions of the
programmer if he used a hexadecimal constant:


j@uriah 405% cat > foo.c
int         
main(void)
{
        unsigned a, b;

        a = 0xd76aa478;
        b = 3614090360;

        return 0;
}
^D
j@uriah 406% cc -Wall foo.c
foo.c: In function `main':
foo.c:7: warning: decimal constant is so large that it is unsigned

Both values above are identical.  Appending the `U' silences the
warning, of course.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)