Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Date:	Mon, 4 Nov 2002 07:26:33 +0100
From:	"Gerrit P. Haase" <gp AT familiehaase DOT de>
Organization:	Esse keine toten Tiere
X-Priority:	3 (Normal)
Message-ID:	<981554689825.20021104072633@familiehaase.de>
To:	Eric Benson <eric_a_benson AT yahoo DOT com>
CC:	perl-xs AT perl DOT org, cygwin AT cygwin DOT com
Subject:	Re: Problems with Perl XS module in C++ on Cygwin
In-Reply-To:	<20021001190659.86230.qmail@web10101.mail.yahoo.com>
References:	<20021001190659 DOT 86230 DOT qmail AT web10101 DOT mail DOT yahoo DOT com>
MIME-Version:	1.0
X-Sender:	320081107336-0001 AT t-dialin DOT net

Hallo Eric,

Am Dienstag, 1. Oktober 2002 um 20:06 schriebst du:

> I'm having trouble building a Perl XS module in C++ on
> Cygwin. I've got Cygwin 1.3.12-2 and I've tried Perl
> 5.6.1 and Perl 5.8.0. This module has built and run
> successfully on Linux. I used the XS C++ guidelines in
> http://www.johnkeiser.com/perl-xs-c++.html

> The first problem is caused by the macro definition of
> vform in perl.h. This causes 

> /usr/include/g++-3/streambuf.h:405: parse error before
> `const'

> when a C++ declaration for vform is encountered. I
> worked around this by adding

> #undef vform

> after the Perl includes. Since none of my code uses
> vform I believe this is safe, but there is probably a
> better solution to this problem.

> The second problem shows up when linking the shared
> object. I get the following error:

> /usr/lib/libcygwin.a(libcmain.o)(.text+0x81):
> undefined reference to `WinMain AT 16'

> This error doesn't occur when building a C-based Perl
> XS module, only a C++ based module.

> I put a dummy main() definition in my .xs file

> #ifdef __CYGWIN__
> int main(int, char**) {}
> #endif

> which made the shared object link successfully.

> Finally, the third and still unsolved problem shows up
> when I try to use the module. When Perl loads the
> module, I get the following (fatal) error:

> Can't find 'boot_CdrDao' symbol in
> /usr/lib/perl5/site_perl/5.8.0/cygwin-multi-64int/auto/CdrDao/CdrDao.dll

> I haven't dug very far into this, but I believe that
> boot_CdrDao is a function that is supposed to be
> generated by the XS compiler to initialize the module.
> Apparently it gets generated properly for C-based XS
> modules but not for C++-based XS modules on Cygwin. I
> suspect that the last two problems are really two
> different symptoms of the same problem.

> I'd appreciate any help at all in solving this from
> the Perl-XS or the Cygwin community. Thanks.

Sorry for replying that late.  Have you tried to build your
module with GCC 3 which is now stable and recommended as
Compiler.  It supports C++ coding much better.
Available through the usual Cygwin mirrors with setup.exe.


Gerrit
-- 
=^..^=


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -