[PATCH] [core] add support to resolve section groups.

[Rui Ueyama]

  Can you write more detailed description for this change, so that we all know what you are trying to solve with this patch?

  The thread you pointed in the description does not have a conclusion of the discussion, and it's unclear what's your goal with this patch. This seems to be the first patch of a series of ones, it's good to know the whole picture beforehand.

http://llvm-reviews.chandlerc.com/D3182