ldap.so: undefined symbol: RETURN_THROWS

[CarloMoretti-Repa]

Description

Starting from today 2024-Dec-13 i guess after an upgrade from 7.4.3-4ubuntu2.24 to 7.4.3-4ubuntu2.26
Just run php CLI to see a warning.
for example:

php -v

Resulted in this output:

PHP Warning:  PHP Startup: Unable to load dynamic library 'ldap' (tried: /usr/lib/php/20190902/ldap (/usr/lib/php/20190902/ldap: cannot open shared object file: No such file or directory), /usr/lib/php/20190902/ldap.so (/usr/lib/php/20190902/ldap.so: undefined symbol: RETURN_THROWS)) in Unknown on line 0
PHP 7.4.3-4ubuntu2.26 (cli) (built: Dec  4 2024 16:05:49) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.3-4ubuntu2.26, Copyright (c), by Zend Technologies

But I expected this output instead:

PHP 7.4.3-4ubuntu2.26 (cli) (built: Dec  4 2024 16:05:49) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.3-4ubuntu2.26, Copyright (c), by Zend Technologies

PHP Version

PHP 7.4.3-4ubuntu2.26 (cli)

Operating System

Ubuntu 20.04.6 LTS

[heiglandreas]

This looks like you did not also update the ldap package.

did you run a general apt upgrade or did you explicitly upgrade the PHP package?

[cmb69]

RETURN_THROWS is a macro, and as such should have been substituted by the preprocessor; apparently, that didn't work for whatever reason. Looks like a distro issues.

Also note that we do not support PHP 7.4 any longer; see https://www.php.net/supported-versions.

[CarloMoretti-Repa]

@heiglandreas

This looks like you did not also update the ldap package.

did you run a general apt upgrade or did you explicitly upgrade the PHP package?

i didn't upgrade anything manually, it was an unattended upgrade
From unattended-upgrades.log:
2024-12-13 06:56:46,298 INFO Packages that will be upgraded: libapache2-mod-php7.4 linux-generic linux-headers-generic linux-image-generic linux-libc-dev php7.4 php7.4-cli php7.4-common php7.4-curl php7.4-json php7.4-ldap php7.4-mbstring php7.4-mysql php7.4-odbc php7.4-opcache php7.4-readline php7.4-xml php7.4-zip

[cmb69]

RETURN_THROWS is a macro, and as such should have been substituted by the preprocessor; apparently, that didn't work for whatever reason.

Well, RETURN_THROWS is only defined as of PHP 8.0.0. This is a general distro issue, see https://askubuntu.com/questions/1535405/php7-4-ldap-broken-on-focal-after-13-dec-2024.

@oerdnj, are you involved in php-ldap-7.4 packaging?

[CarloMoretti-Repa]

@cmb69 thanks, the workaround from GregGiannoni@askubuntu solved the issue for now

[oerdnj]

@oerdnj, are you involved in php-ldap-7.4 packaging?

Not directly in Ubuntu. This needs to be reported directly to Ubuntu (or whomever provided the extension).

[cmb69]

Has already been reported there: https://bugs.launchpad.net/ubuntu/+source/php7.4/+bug/2091695

(Problem is that they applied a security patch which is not suitable for PHP 7.4)