extern "C" int optind;

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Article #1977

#1977

From: James Clark
Date: Thu, 11 May 1989 08:44

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I'm a bit confused about whether `extern "C"' is applicable to data as
well as functions.

I was using getopt(), so I declared `optind' as:

extern "C" int optind;

It turned out that this causes a definition of optind to be emitted,
which seems to prevent getopt() from working.  Declaring it as

extern int optind:

makes it work.

So is `extern "C"' supposed to work with data? If so, how do you say
that you want to refer to something, not define it?

James Clark
jjc@jclark.uucp

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!UUNET.UU.NET!jclark!jjc
From: jclark!jjc@UUNET.UU.NET (James Clark)
Newsgroups: gnu.g++.bug
Subject: extern "C" int optind;
Message-ID: <8905110844.AA24762@jclark.uucp>
Date: 11 May 89 08:44:00 GMT
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