Sure, I can write up a basic how-to for setting up the environment. I assume from the file paths in the source that you moved original development from cygwin/windows to Linux? Let me know where it to download the eCos base, and I will give it a shot.
I actually reverse engineered the Doepfer Schaltwerk to rewrite the OS, but the hardware/processor (8051) really were not capable enough for what I wanted to do. I am excited for the possibilities with the Octopus!