lua protobuf

Would anybody provide a stable, usable lua protobuf lib to me?

I tried three libs for the purpose:
protoc-gen-lua: Seems could not handle the nested messages imported from other proto file
lua-pb: Seems not support the customer options(crash), not support the negative values for enum.
pbc-master: Seems could work under linux, hard to compile under windows
All the projects are not completed and not much active.
It seems that it is diffcult to implement pb in lua.

Would anybody give some suggestion or solution?

you can try https://github.com/cloudwu/pbc