title: gcc error trying to install PIL in a Python2.6 virtualenv
body: <p>I have created a virtualenv with the --no-site-packages option. I get an error trying to install PIL:</p>
  
  <p><a href="http://pastebin.com/SVqxs1sC" rel="noreferrer">http://pastebin.com/SVqxs1sC</a></p>
  
  <pre><code>...
  error: command '/usr/bin/gcc' failed with exit status 1
  
  ----------------------------------------
  Command /home/dustin/.virtualenvs/django1.2/bin/python -c "import setuptools; __file__='/home/dustin/.virtualenvs/django1.2/build/pil/setup.py'; execfile('/home/dustin/.virtualenvs/django1.2/build/pil/setup.py')" install --single-version-externally-managed --record /tmp/pip-t_oikl-record/install-record.txt --install-headers /home/dustin/.virtualenvs/django1.2/include/site/python2.6 failed with error code 1
  Exception information:
  Traceback (most recent call last):
    File "/home/dustin/.virtualenvs/django1.2/lib/python2.6/site-packages/pip-0.7.2-py2.6.egg/pip/basecommand.py", line 120, in main
      self.run(options, args)
    File "/home/dustin/.virtualenvs/django1.2/lib/python2.6/site-packages/pip-0.7.2-py2.6.egg/pip/commands/install.py", line 165, in run
      requirement_set.install(install_options)
    File "/home/dustin/.virtualenvs/django1.2/lib/python2.6/site-packages/pip-0.7.2-py2.6.egg/pip/req.py", line 1243, in install
      requirement.install(install_options)
    File "/home/dustin/.virtualenvs/django1.2/lib/python2.6/site-packages/pip-0.7.2-py2.6.egg/pip/req.py", line 540, in install
      cwd=self.source_dir, filter_stdout=self._filter_install, show_stdout=False)
    File "/home/dustin/.virtualenvs/django1.2/lib/python2.6/site-packages/pip-0.7.2-py2.6.egg/pip/__init__.py", line 226, in call_subprocess
      % (command_desc, proc.returncode))
  InstallationError: Command /home/dustin/.virtualenvs/django1.2/bin/python -c "import setuptools; __file__='/home/dustin/.virtualenvs/django1.2/build/pil/setup.py'; execfile('/home/dustin/.virtualenvs/django1.2/build/pil/setup.py')" install --single-version-externally-managed --record /tmp/pip-t_oikl-record/install-record.txt --install-headers /home/dustin/.virtualenvs/django1.2/include/site/python2.6 failed with error code 1
  </code></pre>
  
  <p>Can someone help me with this?</p>
  
  <p>I'm running Ubuntu 10.04 (64 bit)</p>