title: cc1: error: unrecognized command line option "-Wno-null-conversion" within installing python-mysql on mac 10.7.5
body: <p>This error broke my python-mysql installation on Mac 10.7.5. Here are the steps </p>
  
  <ol>
  <li>The installed python is 2.7.1, mysql is 64 bit for 5.6.11.</li>
  <li>The being installed python-mysql is 1.2.4, also tried 1.2.3</li>
  <li><p>Configurations for the installation</p>
  
  <pre><code>1) sudo ln -s /usr/local/mysql/lib /usr/local/mysql/lib/mysql
  2) Edit the setup_posix.py and change the following mysql_config.path = "mysql_config" to mysql_config.path = "/usr/local/mysql/bin/mysql_config" 
  3) sudo python setup.py build
  </code></pre></li>
  </ol>
  
  <p>Here is the stacktrace for build </p>
  
  <pre><code>running build
  running build_py
  copying MySQLdb/release.py -&gt; build/lib.macosx-10.7-intel-2.7/MySQLdb
  running build_ext
  building '_mysql' extension
  llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -pipe -Dversion_info=(1,2,4,'final',1) -D__version__=1.2.4 -I/usr/local/mysql/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _mysql.c -o build/temp.macosx-10.7-intel-2.7/_mysql.o -Wno-null-conversion -Os -g -fno-strict-aliasing -arch x86_64
  cc1: error: unrecognized command line option "-Wno-null-conversion"
  error: command 'llvm-gcc-4.2' failed with exit status 1
  </code></pre>
  
  <p>Welcome your suggestions and ideas. Thanks.</p>