kennethreitz/osx-gcc-installer — pull request #14 by mistydemeo (2012-10-11 20:21:09+00:00)
Title: Warn about mixing Xcode and osx-gcc-installer

Sorry for the all-caps!

Mixing a full Xcode installation and osx-gcc-installer causes any number of hard-to-diagnose problems down the road. I've talked to a number of users who have the full Xcode installed and intended to keep it, without realizing that installing osx-gcc-installer on top of it can lead to confusing problems later. (Specifically I've helped diagnose a number of mysterious build errors for Homebrew users that came from installing osx-gcc-installer over top of Xcode.)

I think it'd be best to make sure users get a clear warning up front that this is an alternative to Xcode, not something to be installed on top of Xcode.