Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:19107
Return-Path: <david.olsson@vimio.com>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 93772 invoked by uid 1010); 21 Sep 2005 10:24:18 -0000
Delivered-To: ezmlm-scan-internals@lists.php.net
Delivered-To: ezmlm-internals@lists.php.net
Received: (qmail 93757 invoked from network); 21 Sep 2005 10:24:18 -0000
Received: from unknown (HELO lists.php.net) (127.0.0.1)
  by localhost with SMTP; 21 Sep 2005 10:24:18 -0000
X-Host-Fingerprint: 212.32.183.87 87.183.32.ip.nordiq.net  
Received: from ([212.32.183.87:13916] helo=localhost.localdomain)
	by pb1.pair.com (ecelerity 2.0 beta r(6323M)) with SMTP
	id 7E/DD-19329-1D431334 for <internals@lists.php.net>; Wed, 21 Sep 2005 06:24:17 -0400
Message-ID: <7E.DD.19329.1D431334@pb1.pair.com>
To: internals@lists.php.net
Date: Wed, 21 Sep 2005 12:20:52 +0200
User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)
X-Accept-Language: en-us, en
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Posted-By: 212.32.183.87
Subject: Missing symbol upon loading module
From: david.olsson@vimio.com (David Olsson)

I have a PHP extension written in C++ which I use for parsing and 
building WbXml documents. I have tested building and using it on a 32 
bit x86 system running the following:

PHP 4.3.10
GCC 3.3.5
Gentoo Linux 2.6.10-r4

Everything works fine on this configuration. I do however need the 
extension to run on a x86 64 bits machine using the following configuration:

PHP 4.4.0
GCC 3.2.3
RedHat Enterprise Linux 3 2.4.21-15

Everything compiles fine, no errors. When PHP tries to load the module 
however, I get the following error:

PHP Warning:  Unknown(): Unable to load dynamic library 
'/usr/local/php4/extensions/php_wbxml.so' - 
/usr/local/php4/extensions/php_wbxml.so: undefined symbol: 
__gxx_personality_v0 in Unknown on line 0

The name of the module is, obviously, php_wbxml.so. What does this error 
mean? I have tried to explicitly link against libsupc++ (which, from 
what I can gather, should include the __gxx_personality_v0 symbol) but 
the same error remains.

I have moved other modules without problems between the two systems but 
this one doesn't seem to work.

Here's the config.m4 I am using:

PHP_ARG_ENABLE(php_wbxml, whether to enable WbXml support,
[--enable-php_wbxml  Enable WbXml support])

if test "$PHP_PHP_WBXML" = "yes"; then
	PHP_REQUIRE_CXX()
	PHP_ADD_LIBRARY(stdc++, 1, PHP_WBXML_SHARED_LIBADD)
	AC_DEFINE(HAVE_PHP_WBXML, 1, [whether you have WbXml])
	PHP_NEW_EXTENSION(php_wbxml, php_wbxml.cpp TextXmlDocument.cpp 
tinystr.cpp tinyxml.cpp tinyxmlerror.cpp tinyxmlparser.cpp 
WbXmlDocument.cpp XmlAttribute.cpp XmlDocument.cpp XmlElement.cpp 
XmlHandle.cpp XmlNode.cpp XmlText.cpp, $ext_shared)
fi

VERY grateful for any tips on how to proceed.

Best regards
David Olsson