[erlang-questions] How to use gpb?

[Bin Wang]

Hi,

I'm using google protocol buffers. I found an erlang plugin named
gpb(https://github.com/tomas-abrahamsson/gpb). But I don't know how
to use it. When I add it as a dependency of my app using rebar, while
compile, it always comes out this error:

ERROR: Protobuffs library not present in code path!

Which I searched in google and only found it in erlang_protobuffs
code. I do use it as a dependency before, but dose it matters?