[pkg-uWSGI-devel] Bug#962186: Bug#962186: Bug#962186: uwsgi-plugin-php: CI fails with SIG_SEGV in bullseye

[Jonas Smedegaard]

Quoting Alexandre Rossi (2020-06-04 16:08:26)
> The problem seems to be that the PHP plugin is compiled against PHP7.4
> and is linked with libphp.so which points to 7.3 in bullseye and 7.4 in sid.
> 
> $ ldd /usr/lib/uwsgi/plugins/php_plugin.so | grep php
> libphp7.so => /usr/lib/libphp7.so (0x00007f4b8ca48000)
> $ ls -l /usr/lib/libphp7.so
> lrwxrwxrwx 1 root root 25 mai   11 19:41 /usr/lib/libphp7.so -> /etc/alternatives/libphp7
> $ ls -l /etc/alternatives/libphp7
> lrwxrwxrwx 1 root root 21 mai   11 19:41 /etc/alternatives/libphp7 -> /usr/lib/libphp7.4.so
> 
> The php plugin should explicitly be linked against /usr/lib/libphp7.4.so

It seems uwsgi gets its information for which library to link against
from /usr/bin/php-config (see /usr/src/uwsgi/plugins/php/uwsgiplugin.py).

And it seems php-dev and php4.7-dev ships php-config* tools that (I guess)
both provides that name using the dpkg alternatives systems.

Try check if those varying build tools offer different build hints,
and if they do then try comeup with a patch for plugins/php/uwsgiplugin.py
to use php-config only by default, overridable by an environment variable.

If those picking the right build tool doesn't solve this,
then try come up with some other patch taking some other more direct
environment variable into account (look at other plugins and try mimic
upstream style, so that hopefully your patch can be adopted upstream).

Then we can have uwsgi-plugin-php pass a suitable environment variable
resolved at build time from the package pulled in by its build-dependency
on virtual package "php-dev".

 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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