Xref:	news2.mv.net comp.os.msdos.djgpp:3118
From:	Erik Max Francis <max AT alcyone DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: PDCURSES in a C++ program can it be done with djgpp?
Date:	Wed, 24 Apr 1996 15:07:19 -0700
Organization:	Alcyone Systems
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Message-ID:	<317EA617.2BF7FC30@alcyone.com>
References:	<199604230851 DOT SAA07134 AT linuxbox DOT nse DOT com DOT au>
NNTP-Posting-Host:	newton.alcyone.com
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

root wrote:

> Ok, I boiled it down to a simplisimus curses program:
> ( the real program is about 32k so I'm not going to flood the world
> with it when a simple example has the same effect ( for me ) )

Without knowing what the error was, it's hard to say what your problem is.  I'm
going to make the assumption that you're actually using the library correctly; in
that case, your problem may be that of a link problem.  If you're trying to link C
code in with C++ code, you must use extern "C" { ... } around the headers that are
being included in the C++ file.  The reason is because C and C++ have different
symbol naming conventions, and without the extern "C" { ... } declaration the linker
is looking for C++-named calls, when in fact they will be C-named calls.

If curses.h doesn't contain the extern "C" { ... } identifiers, the easiest way to
get it done is in your C++ program to include curses.h as:

    extern "C" {
    #include <curses.h>
    }

(I don't know whether the curses library you're using already has the extern "C" {
.... } under a conditional compilation clause, but I'm guessing that it doesn't.)

-- 
Erik Max Francis &tSftDotIotE && http://www.alcyone.com/max && max AT alcyone DOT com
San Jose, California, U.S.A. && 37 20 07 N 121 53 38 W && the 4th R is respect
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Omnia quia sunt, lumina sunt. && Dominion, GIGO, GOOGOL, Omega, Psi, Strategem
"Out from his breast/his soul went to seek/the doom of the just." -- _Beowulf_

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