Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!ncifcrf!nlm-mcs!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.std.c
Subject: Re: Prototypes and ID lists
Message-ID: <10551@smoke.BRL.MIL>
Date: 19 Jul 89 06:14:21 GMT
References: <16803@rpp386.Dallas.TX.US>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 15

In article <16803@rpp386.Dallas.TX.US> jfh@rpp386.Dallas.TX.US (John F. Haugh II) writes:
-Suppose I prototype a function with
-extern struct passwd *getpwuid (uid_t uid);
-and later in the same compilation unit have a declaration
-struct passwd *
-getpwuid (uid)
-uid_t uid;
-{
-	[ stuff ]
-Is my [ supposedly ] ANSI-compliant compiler free to warn
-me that getpwuid() has been redefined?

But it hasn't been redefined!  It's been defined just once, and
then compatibly with the prototype declaration of its interface
that's in scope at the point of definition.