[Development] MYSQL / MariaDB pre-build plugins

[Christian Ehrlicher]

Am 30.12.2019 um 15:13 schrieb Thiago Macieira:
>>    - do we need a small paragraph in the documentation why we can't ship
>> it anymore and that MariaDB should be preferred?
> Yes. Just ship the MariaDB one.
>
> Can you explain why this isn't done now?
Maybe since nobody cares? Don't know. That's why I bring it up here.

>   Why can't we build against the
> MariaDB libraries and ship those, with their ability to connect to MySQL
> servers?
>
> Is the issue the SONAME that the library comes under? That you have to choose
> at link time which one of the two you want, meaning the one that needs to be
> present at runtime? If so, my recommendation stands: use MariaDB.
Yes, they're using symlinks from libmysqlclient.so to libmariadb.so.3:
 > ll /usr/lib64/libmysqlclient*
lrwxrwxrwx 1 root root 15 16. Dez 12:11 /usr/lib64/libmysqlclient_r.so
-> libmariadb.so.3
lrwxrwxrwx 1 root root 15 16. Dez 12:11 /usr/lib64/libmysqlclient.so ->
libmariadb.so.3

 > ldd plugins/sqldrivers/libqsqlmysql.so
         ...
         libmariadb.so.3 => /usr/lib64/libmariadb.so.3 (0x00007fabaec5b000)

And on windows it's currently not possible to link against mariadb since
the (import) libs are named libmariadb.

Christian