Hi,
thanks to two of our active users (thank you Thomas, Sölve!) we found a problem while linking to the correct Felgo libraries on 64 bit Linux systems. Our project include file still links to 32 bit libraries which obviously breaks the build.
We will push a new version of the SDK shortly which fixes this, in the meantime you can use this project include file for your custom projects: http://d.pr/f/S018
Cheers,
Alex