title: osx-gcc-installer over the top of Xcode
body: <p>When running <code>rbenv install 1.9.2-p320</code>, I get the following output: </p>
  
  <blockquote>
    <p>ERROR: This package must be compiled with GCC, but ruby-build couldn't
    find a suitable <code>gcc</code> executable on your system. Please install GCC
    and try again.</p>
    
    <p>DETAILS: Apple no longer includes the official GCC compiler with Xcode
    as of version 4.2. Instead, the <code>gcc</code> executable is a symlink to
    <code>llvm-gcc</code>, a modified version of GCC which outputs LLVM bytecode.</p>
    
    <p>For most programs the <code>llvm-gcc</code> compiler works fine. However,
    versions of Ruby older than 1.9.3-p125 are incompatible with
    <code>llvm-gcc</code>. To build older versions of Ruby you must have the official
    GCC compiler installed on your system.</p>
    
    <p>TO FIX THE PROBLEM: Install the official GCC compiler using these
    packages: <a href="https://github.com/kennethreitz/osx-gcc-installer/downloads" rel="nofollow">https://github.com/kennethreitz/osx-gcc-installer/downloads</a></p>
    
    <p>You will need to install the official GCC compiler to build older
    versions of Ruby even if you have installed Apple's Command Line Tools
    for Xcode package. The Command Line Tools for Xcode package only
    includes <code>llvm-gcc</code>.</p>
  </blockquote>
  
  <p>I've got Xcode 4.3.2 installed. Am I safe to install the osx-gcc-installer over the top - will this both fix the above issue and keep Xcode running smoothly for iOS development?</p>
  
  <p>Thanks in advance.</p>