From:	jpalluch AT aol DOT com (JPalluch)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Problems defining external symbols in C++ !?
Lines:	37
Message-ID:	<1998082116421600.MAA22427@ladder03.news.aol.com>
NNTP-Posting-Host:	ladder03.news.aol.com
Date:	21 Aug 1998 16:42:16 GMT
References:	<35dcd766 DOT 101916239 AT news DOT pathcom DOT com>
Organization:	AOL Bertelsmann Online GmbH & Co. KG http://www.germany.aol.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Im Artikel <35dcd766 DOT 101916239 AT news DOT pathcom DOT com>, oliver AT jesus DOT hv (Oliver
Richman) schreibt:

>I am converting a large C program to C++ using DJGPP, and all is going
>well, but for some reason when I do this:
>
>from moo.cc:
>const struct moostruct moovariable[] = { ... }
>
>from moo2.cc:
>extern const struct moostruct moovariable[];
>
>I get an "undefined reference to moovariable" in moo2.cc.
>
>

A const is automatically static, so your compiler needs to see the extern
declaration of moovariable in moo.cc too.

Do it just this way:

moo.h:
extern const struct moostruct moovariable[];

moo.cc:
#include "moo.h"
const struct moostruct moovariable[] = { ... }

moo2.cc:
#include "moo.h"
// without this line: extern const struct moostruct moovariable[];

This should help.

Jens

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