Just posted this question -Compiling (NS/Cocoa) Emacs on OSX with SVG support - and was immediately told this was perhaps off topic, and to take it to SO.
There are a lot of questions on AskDifferent relating to
homebrew and compiling software, please let me know if this question is off topic or not.
side note: This was voted to close on SO for being off topic, and I'd tend to agree with that, here however I feel it's on topic.
If this were a general Unix compilation question, I'd be in full agreement that it was better suited to the Unix stackexchange, or maybe SuperUser, however, this is 100% mac/osx specific, and has no relevance to other platforms.