Actually, it looks like GCC is no longer necessary to compile Ruby.

It was [fixed in Ruby about two years ago](https://bugs.ruby-lang.org/issues/5076). LLVM has been supported since 1.9.3-p125. There's a pretty detailed [Stack Overflow](http://stackoverflow.com/questions/8032824/cant-install-ruby-under-lion-with-rvm-gcc-issues) thread about it.

Given that, can we skip this step entirely and avoid installing GCC?