title: mpi4py installation in mac
body: <p>I'm trying to install mpi4py on mac, but I've faced with below error:</p>
  
  <p>Searching for mpi4py</p>
  
  <pre><code>Best match: mpi4py 1.2.2 
  Downloading http://mpi4py.googlecode.com/files/mpi4py-1.2.2.tar.gz 
  Processing mpi4py-1.2.2.tar.gz 
  Running mpi4py-1.2.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-HNJHvI/mpi4py-1.2.2/egg-dist-tmp-eL_Hte 
  Compiling with an SDK that doesn't seem to exist: /Developer/SDKs/MacOSX10.5.sdk Please check your Xcode installation
  _configtest.c:1:20: error: stdlib.h: No such file or directory
  error: Setup script exited with error: Cannot compile/link MPI programs. Check your configuration!!!
  </code></pre>
  
  <p>Note that I installed openmpi before.</p>
  
  <p>Any body knows what's the solution?</p>