title: How to disable Apple's LLVM on mac
body: <p>I started to learn about Mix IDE and the thing is that, while compiling the Mix IDE, it keeps failing to compile source in the package. So I've done some search and it turns out that I need to use old version llvm. So I installed llvm37 using home-brew and there was no problem while installing it. The only problem is that when I type </p>
  
  <pre><code>clang --version
  </code></pre>
  
  <p>it keeps returning the following result.</p>
  
  <pre><code>Apple LLVM version 7.3.0 (clang-703.0.31)
  Target: x86_64-apple-darwin15.5.0
  Thread model: posix
  InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
  </code></pre>
  
  <p>Therefore, I need to know how to disable the default LLVM and use the one I installed with Homebrew. Any idea?</p>