Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!ucsd!ames!amdahl!rtech!mikes@rtech.UUCP
From: mikes@rtech.UUCP (Mike Schilling(This sentence no verb.))
Newsgroups: comp.std.c
Subject: extern
Message-ID: <4231@rtech.rtech.com>
Date: 5 Dec 89 17:13:54 GMT
Sender: news@rtech.rtech.com
Lines: 18

If the variable referenced in an "extern" declaration is never used, is a
reference created?  For instance, if "foo.h" contains:

	int foo_func(int i, double d);
	extern int ifoo;

and I include it to get the prototype, but don't make any use of "ifoo",
(or define it in any other module) will I get a link error?

I know the answer under VMS, AOS, SunOS, etc, but don't know what ANSI 
mandates (if anything).
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Mike Schilling 				mikes@rtech.com
Ingres Corporation
Alameda, CA