ID: 42629
Updated by: [EMAIL PROTECTED]
Reported By: jdolecek at NetBSD dot org
Status: Assigned
Bug Type: Dynamic loading
Operating System: Mac OS X 10.4.10
PHP Version: 5.2.4
Assigned To: kalowsky
New Comment:
See also bug #42630
Previous Comments:
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[2007-09-13 10:12:07] [EMAIL PROTECTED]
Assigned to our MacOSX expert. :)
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[2007-09-12 16:45:22] [EMAIL PROTECTED]
When this code was originally written, PDO didn't exist and as such the
choice to use the PRIVATE option was made to keep the namespace the
least polluted possible. Having not tested the patch, the changes make
sense and probably should be applied provided they don't cause any
adverse affects to other files included.
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[2007-09-11 20:05:20] jdolecek at NetBSD dot org
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
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--
Edit this bug report at http://bugs.php.net/?id=42629&edit=1
