I've used a few of the custom builds on Graphicall, and I'd like to give back by helping contribute some back. I've got a Mac, which is a bit of an underdog in terms of building submitted, and I've got decent experience with Subversion and other version control systems, but haven't seen a "how to" on compiling builds for others.
How do I set up a build environment on my Mac for compiling and bundling build packages to Graphicall?