mxcl/homebrew — pull request #13011 by ttilley (2012-06-25 17:59:50+00:00)
Title: update bdw-gc 

I've updated bdw-gc to be buildable from git master, as well as download the semi-optional libatomic_ops dependency the same way when building --HEAD. I think we may be the only package system that doesn't build with libatomic_ops by default.

In addition to building from git, I've exposed various configure options as brew options.

I've added two helpers that probably don't belong in a formula file that extend the base class for some added convenience. One is for getting all of the default homebrew paths in one go, and the other is for flipping configure options on and off like a switch (rather than simply omitting them and relying on defaults not changing).