[Pharo-users] OSWindowSDL2

I'm not a smalltalk expert, but from time to time I like to do some experiments. Recently, we talked about making a small 2D-Game, to do something else than a traditional CRUD database application. I downloaded pharo 4.0 for Linux (the default version). My OS version is 3.13.0-46-generic #79-Ubuntu: Then I installed SDL2 with apt-get. All seemed to he OK. I started pharo, and executed the following code in the playground: |ex | ex := SDL2Example new . ex osWindow . I got an error: Failed to find SDL2 library. , Should I have been doing some extra initialization to load the library in Pharo, or is there something else that I forgot to do? Kind regards Edwin