The cost or otherwise of xcode is irrelevant. This is about repackaging apple's distributions of various tools for our convenience. As others have said the $5 is simply a push to do something that probably should have been done before.
In light of this I am personally in favor of simply taking the binary pkgs out of the xcode dmg, in pursuit of maximum compatibility and minimum duping, and general adherence to homebrew's stated project goals.
However this would obviously require some research as to the specific licensing issues involved, and some dialog with apple. If it turns out to be OK, then the whole thing would be pretty trivial.
If it doesn't pan out, then look at messier options like using different builds, making your own headers (yuck) etc.
In light of this I am personally in favor of simply taking the binary pkgs out of the xcode dmg, in pursuit of maximum compatibility and minimum duping, and general adherence to homebrew's stated project goals.
However this would obviously require some research as to the specific licensing issues involved, and some dialog with apple. If it turns out to be OK, then the whole thing would be pretty trivial.
If it doesn't pan out, then look at messier options like using different builds, making your own headers (yuck) etc.