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From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.lang.c,comp.os.msdos.programmer,comp.sys.ibm.pc.programmer,alt.msdos.programmer
Subject: Re: Suspicious pointer conversion warning in Turbo C 2.0
Message-ID: <17154@haddock.ima.isc.com>
Date: 27 Jul 90 00:31:42 GMT
References: <1990Jul25.230836.2442@Octopus.COM> <32108@cup.portal.com>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Followup-To: comp.lang.c
Organization: Interactive Systems, Cambridge, MA 02138-5302
Lines: 13

>> void AddLNode(void ** Hptr, void * Nptr);
>> Tlist *Head, *Walker;
>> AddLNode(&Head,Walker);	/* This statement generates a warning */
>
>The warnings you are getting are from the first parameter.  When I cast
>it to AddLNode((void **)&Head, Walker); I don't get any warnings.

It should be noted that, although it silences the warnings, the cast makes the
code incorrect.  It will fail on (existing) implementations where `Tlist *'
and `void *' do not have the same internal format.

Karl W. Z. Heuer (karl@kelp.ima.isc.com or ima!kelp!karl), The Walking Lint
Followups to comp.lang.c only.