Hey, and thanks for the reply. I did just download the big files, but with the unstable eduroam connection currently at my university it took a while ^^.
Anyways I tried the same with the full SDK.
I first did a normal make and got a lot of output. (Yes i ran it through sudo).
It caame up text with entereing and leaving directories (no errors) so i assume things worked.
Made a normal hello world app, also using the sf::Clock and print time. And everything linked and compiled fine and time also printed out nicely
So everything seems to work all right now.
Thank you for your help, I will now continue exploring the world of game-programming with SFML