From: jdolecek at NetBSD dot org
Operating system: Mac OS X 10.4.10
PHP version: 5.2.4
PHP Bug Type: Dynamic loading
Bug description: Dynamically loaded PHP extensions need symbols exported
Description:
------------
Some PHP extensions expect to have symbols from other PHP extensions
available. This is the case for PDO drivers (which use symbols from PDO
extension) and XSL (which uses symbols from DOM extension).
Extensions are loaded with dlopen(..., RTLD_GLOBAL) on platforms with
dlopen() (i.e. most unices). On Mac OS X, NSLinkModule() is used instead of
dlopen(), but with 'private' option, which hides symbols of dynamically
loaded extensions from other dynamically loaded code.
Due to this symbol hiding, PDO and DOM needed to be compiled into base PHP
binary, otherwise the dependant extension couldn't be dynamically loaded
since expected symbols are not found. PDO configure script even
intentionally silently disables compilation of dynamically loaded PDO
module on MacOSX/Darwin because of this.
Following patch makes it possible to load also PDO and DOM dynamically on
Mac OS X and thus PHP extensions work all the same way as on other UNIX
systems:
--- Zend/zend_extensions.c.orig 2007-09-11 22:00:50.000000000 +0200
+++ Zend/zend_extensions.c
@@ -243,7 +243,7 @@ void *zend_mh_bundle_load(char* bundle_p
return NULL;
}
- bundle_handle = NSLinkModule(bundle_image, bundle_path,
NSLINKMODULE_OPTION_PRIVATE);
+ bundle_handle = NSLinkModule(bundle_image, bundle_path,
NSLINKMODULE_OPTION_NONE);
NSDestroyObjectFileImage(bundle_image);
/* call the init function of the bundle */
Reproduce code:
---------------
Compile PDO (after fix to configure script) as dynamic extensions, as well
as pdo_mysq, and add into php.ini lines:
extension=pdo.so
extension=pdo_mysql.so
then run:
php -m | grep -i pdo
Expected result:
----------------
PDO
pdo_mysql
Actual result:
--------------
dyld: lazy symbol binding failed: Symbol not found:
_php_pdo_declare_long_constant
Referenced from: /Users/Shared/pkg/lib/php/20040412/pdo_mysql.so
Expected in: flat namespace
dyld: Symbol not found: _php_pdo_declare_long_constant
Referenced from: /Users/Shared/pkg/lib/php/20040412/pdo_mysql.so
Expected in: flat namespace
Trace/BPT trap
--
Edit bug report at http://bugs.php.net/?id=42629&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=42629&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=42629&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=42629&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42629&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=42629&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42629&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42629&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42629&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42629&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42629&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=42629&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=42629&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42629&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42629&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42629&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42629&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42629&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42629&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42629&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42629&r=mysqlcfg
