https://guides.cocoapods.org/using/getting-started.html#installation
since the gcc symlink issue is present on any default macos installs with xcode 4.2 or higher, most users ( including myself ) may not understand that the issue isn't with something that they have done, but simply with the default macos xcode instillation. providing a bit of clarification that the issue is present on xcode installations would be likely to help a lot of new users with the instillation process.