How does one link Botan 2? Can't build on Linux Mint

[coolblock]

I can build Botan successfully on its own but when I build QSsh, it has a problem with including Botan headers.
Something is missing in the instructions.
After cloning QSsh, one has to clone Botan somewhere, but where?
And then what is the sequence of building and linking.

[mardy]

You are welcome to try my branch here: https://github.com/mardy/QSsh/tree/botan-1 (make sure you select the botan-1 branch)