For reference, I picked Frankenstein, Alice in wonderland and Moby dick as sources and I think they might be larger than necessary as they take some time to load. But they still work fine.
There also seems to be a bug in babble.c in the thread handling? I did "fix" it as gcc suggested by changing pthread_detach(&thread) to pthread_detach(thread).. I probably broke something but it compiles and runs now :)