Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!cmcl2!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Prototyping char parameters in ANSI C
Message-ID: <10139@smoke.BRL.MIL>
Date: 27 Apr 89 04:23:04 GMT
References: <3950014@eecs.nwu.edu>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 15

In article <3950014@eecs.nwu.edu> gore@eecs.nwu.edu (Jacob Gore) writes:
>	void f(char);
>	void f(c)
>	   char c;
>	{
>	}
>The version of GNU cc I have complains:

Once again GCC is correct.  The "old style" function definition is of
a function that is passed an int (NOT a char) argument when it is called
and which subsequently accesses the least-significant char of the int
that was passed.  The prototype declaration is for a function that is
(potentially) passed just a char, not an int.  Therefore the argument-
passing details are potentially different between the two cases, and it
is considered a function declaration/definition mismatch.