title: Installing OpenCV with Brew never finishes
body: <p>So I'm trying to install opencv using Homebrew but it isn't working. I used <code>brew tap homebrew/science</code> and then <code>brew install opencv</code>
  What happens is:</p>
  
  <pre><code>==&gt; Installing opencv from homebrew/homebrew-science
  ==&gt; Installing dependencies for homebrew/science/opencv: gcc, eigen, jpeg, libpng, libtiff, ilmbase, openexr, homebrew/python/numpy
  ==&gt; Installing homebrew/science/opencv dependency: gcc
  ==&gt; Downloading http://ftpmirror.gnu.org/gcc/gcc-5.1.0/gcc-5.1.0.tar.bz2
  Already downloaded: /Library/Caches/Homebrew/gcc-5.1.0.tar.bz2
  ==&gt; Patching
  patching file gcc/jit/Make-lang.in
  ==&gt; ../configure --build=x86_64-apple-darwin13.4.0 --prefix=/usr/local/Cellar/gcc/5.1.0 --libdir=/usr/local/Cellar/gcc/5.1.0/lib/gcc/5 --enable-langua
  ==&gt; make bootstrap
  </code></pre>
  
  <p>And then it just doesn't stop, I've run it for close to an hour. The task on the top of the terminal window (you know, where it says bash generally) keeps rapidly changing, often to things like "ruby" but nothing gets outputted after this point.</p>
  
  <p>Any ideas? Thanks.</p>