[Boost-users] How to build modular boost for android?

How do I build modular boost for android? I have it checked out from github at the 1.57 tag. I don't see a user-config.jam file, except for at "tools/build/example/user-config.jam". The structure is completely changed, where do I need to make changes? What changes do I make? Any guidance is appreciated. I'm no where near an expert here, I just need a quick ad-hoc solution. Thanks.