title: Can't install discount with pip: error: command 'cc' failed with exit status 1
body: <p>I am running into many problems when trying to install the <code>discount</code> package on osx 10.9 Mavericks. I'm working with the django framework.</p>
  
  <p>My steps are (while having a virtualenv activated):</p>
  
  <pre><code>pip install discount
  </code></pre>
  
  <p>Then I get: </p>
  
  <pre><code>.
  .
  .
  
  1 error generated.
  
  error: command 'cc' failed with exit status 1
  
  ----------------------------------------
  Cleaning up...
  Command /Users/KaeserMic/Sites/2013/Duotones/naturkostbar/env/bin/python -c "import setuptools;__file__='/Users/KaeserMic/Sites/2013/Duotones/naturkostbar/env/build/discount/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/4b/smwv2y_s32z044brp6t__ssh0000gp/T/pip-65i7x3-record/install-record.txt --single-version-externally-managed --install-headers /Users/KaeserMic/Sites/2013/Duotones/naturkostbar/env/include/site/python2.7 failed with error code 1 in /Users/KaeserMic/Sites/2013/Duotones/naturkostbar/env/build/discount
  Storing complete log in /Users/KaeserMic/.pip/pip.log
  </code></pre>
  
  <p>Here is the complete log: </p>
  
  <p><a href="https://gist.github.com/MichaelKaeser/7302829">https://gist.github.com/MichaelKaeser/7302829</a></p>
  
  <p>Things I did:</p>
  
  <ul>
  <li>updating python</li>
  <li>updating pip</li>
  <li>updating virtualenv</li>
  <li>updating homebrew</li>
  </ul>
  
  <p>Any ideas how to solve this issue?
  Thanks in advance.</p>