Check your plugins_dir — make sure there is a “rsp.so” and a “out-daap.so”. It looks like they are missing.
Of course you were right about the mentioned files, but there were alot of other cross-compiling related issues as well. Anyway, FireFly is now running on the DNS-323 and I’ve described the process in our ‘hacking’ Wiki:
I guess the script mentioned in the Wiki needs to be cleaned up a bit and I had to set a few things to get this baby compile for the DNS-323, namely:
# Before configure
And, I had to pass CPPFLAGS=-DSETPGRP_VOID to configure.