Following a hint from dspace support I successfully cross compiled the libraries (If anyone needs the toolchain file, feel free to contact me).
Now I have problems with the blasfeo c code, since the code has only been optimized for the dspace Autobox - next to “normal” system architectures like windows. I get errors regarding the missing <brtenv.h> of the scalexio, the timing files and at the memory allocating.
@FreyJo, @giaf what would you think, how long would it take to get those things changed to the Scalexio architecture? Are you interested in this topic?
I have to finish my thesis soon, so I would appreciate a recommendation. 
Thanks a lot, greets,
Alex