here is your issue:
125 :info:build dyld: Library not loaded: /opt/local/lib/libffi.6.dylib
126 :info:build Referenced from: /opt/local/libexec/llvm-3.3/lib/libLTO.dylib
127 :info:build Reason: image not found
I assume you have libffi installed. That was updated and the library name changed.
So - to fix this properly you'll need to rebuild llvm-3.3 against the new libffi. Uninstall llvm-3.3 and then reinstall it.
To fix this for the moment you could make a symlink from the new libffi name to the old libffi name. Just do the right fix as soon as you have a moment.