[Vala] Problem using Mysql in Vala (Fedora 21): /usr/bin/ld: cannot find -lmysqlclient

[AxP <Der_AxP t-online de>]

Hello,

I tried to use MySQL today with Vala but ran into some Problems. I 
searched for some solutions but couldn't fix the issue. I saw a few 
threads on the list with a similar problem but it didn't help me.
First I was trying to get 
http://www.fromdual.com/mysql-vala-program-example working, now it's 
only this short snippet:

> using Mysql;
>
> static int main(string[] args) {
>
>     Database mysql = new Mysql.Database();
>
>     return 0;
> }

Problem is that I get this message in return:
> valac "main.vala" --pkg mysql -X -lmysqlclient (im Verzeichnis: 
> /home/axp/Dokumente/Workspaces/10 Vala/MailServer/src)
> main.vala:5.14-5.41: warning: local variable `mysql' declared but 
> never used
>     Database mysql = new Mysql.Database();
>              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> /usr/bin/ld: cannot find -lmysqlclient
> collect2: Fehler: ld gab 1 als Ende-Status zurück
> error: cc exited with status 256
> Compilation failed: 1 error(s), 1 warning(s)
> Kompilierung fehlgeschlagen.

I think that there could be problem with my setup. I've done:
> yum install mysql-server
> yum install mysql-devel
So the libraries and headers are installed and new.

Compilation with valac -c "%f" --pkg mysql -X -lmysqlclient is working.
But really creating the little program with valac "%f" --pkg mysql -X 
-lmysqlclient fails.

I thought this could be a nice opportunity to try the mailing list. I 
hope the problem is not too trivial and I'm the only one who doesn't 
know the solution :B
Thank you in advance!