Header Maps?

I'm battling with Xcode and Boost, so I apologize with the somewhat Xcode-specific parts of my question.

I know Xcode generates Header Maps, and I've looked at clong::HeaderMap. But I don't really know how Xcode chooses to create Header Maps.

I'm trying to avoid adding a search path for all of Boost, and only including the Boost headers that actually get used. Xcode seems to inconsistently find headers. One problem is that boost inconsistently uses quotes-vs.-angle brackets when including.

Anyway, is there a tool that can dump out a .hmap file in human-readable form, to help me see what Xcode is doing?

BTW, I've tried asking on the Xcode list for insight into how Xcode tries to use .hmaps, but have yet to receive a good answer.