help with backtrace/debuging

I was looking into using the Pecl PDO extension a couple of days ago.
I got it installed but when I try to use it dies. Here's the bug
report I filed:

http://pecl.php.net/bugs/bug.php?id=4217&edit=2

I rebuilt my mod_php with debugging but I still can't get a backtrace
using gdb. Do I have to also rebuild my apache with debugging?

Thanks,

--
Greg Donald
Zend Certified Engineer
http://destiney.com/

Does the segfault only occur when you load PDO into mod_php?

If you haven't already tried it, try using PHP CLI to reproduce the
problem instead; that removes one major variable (Apache) from the
equation. Ensure that PHP is built with --enable-debug, then rebuild
PDO and try to reproduce the segfault from the command line.

I rebuilt PDO and enabled debugging. It's acting a bit different now
with debugging and being outside of Apache:

cat pdo.php
#!/usr/bin/php -q
<?php

error_reporting( E_ALL );

$extensions = get_loaded_extensions();

if( in_array( 'pdo', $extensions ) )
{
echo 'pdo.so extension already loaded';
}
else
{
if( dl('pdo.so') )
{
echo 'pdo.so extension loaded with dl()';
}
else
{
echo 'pdo.so extension failed to load with dl()';
}
}

$dsn = 'mysql:dbname=test;host=localhost';
$user = 'root';
$password = 'passwd';

try {
$dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}

?>

./pdo.php

Warning: Module 'PDO' already loaded in Unknown on line 0
pdo.so extension failed to load with dl()Connection failed: could not
find driver/var/tmp/portage/php-5.0.3-r1/work/php-5.0.3/Zend/zend_execute.c(3255)
: Freeing 0x08613A4C (16 bytes), script=./pdo.php
=== Total 1 memory leaks detected ===

head /etc/php/cli-php5/php.ini
[PHP]

extension=pdo.so

;;;;;;;;;;;
; WARNING ;
;;;;;;;;;;;
; This is the default settings file for new PHP installations.
; By default, PHP installs itself with a configuration suitable for
; development purposes, and NOT for production purposes.

--
Greg Donald
Zend Certified Engineer
http://destiney.com/

Oops, didn't mean to take this off-list...

So three things:

1. If you print the results of get_loaded_extensions(), you'll see
   that pdo turns up as 'PDO', but you're looking for 'pdo' -- so the
   result of your first if() is FALSE.
2. You then try loading pdo.so again, but it's already loaded by
   php.ini, therefore you get the Warning and your own error message.
3. You plan on connecting to MySQL, but don't appear to have loaded
   pdo_mysql.so anywhere. So you need to fix that.

Dan