title: gcc-4.2 failed with exit status 1
body: <p>I've been looking for an answer to this issue but I couldn't find it, so here it is.</p>
  
  <p>I'm trying to install <a href="http://sk1project.org/modules.php?name=Products&amp;product=uniconvertor">Uniconvertor</a> with a setup.py file into a MacOS X Lion (Python 2.7.2) using:</p>
  
  <pre><code>python setup.py install
  </code></pre>
  
  <p>Then I get the following error code:</p>
  
  <pre><code>running install
  running build
  running build_py
  running build_ext
  building 'uniconvertor.app.modules.streamfilter' extension
  gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -g -O2 -DNDEBUG -g -O3 -arch i386 -arch x86_64 -DMAJOR_VERSION=1 -DMINOR_VERSION=1 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/modules/filter/streamfilter.c -o build/temp.macosx-10.6-intel-2.7/src/modules/filter/streamfilter.o
  unable to execute gcc-4.2: No such file or directory
  error: command 'gcc-4.2' failed with exit status 1
  </code></pre>
  
  <p>I looked for the 'gcc-4.2' file in the Developer/usr/bin folder and it wasn't there, but there's a 'llvm-gcc.4.2' file that makes me think I should change the compiler from 'gcc-4.2' to the 'llvm-gcc.4.2' one.</p>
  
  <p>I'm kind of new to Mac and I don't know how else to fix it.</p>
  
  <p>Thanks.</p>
  
  <p>Edit:</p>
  
  <p>I tried using:</p>
  
  <pre><code>cd /Developer/usr/bin
  ln -s llvm-gcc-4.2 gcc-4.2
  </code></pre>
  
  <p>And I get a little more progress, but then a new error:</p>
  
  <pre><code>running install_lib
  creating /Library/Python/2.7/site-packages/uniconvertor
  error: could not create '/Library/Python/2.7/site-packages/uniconvertor': Permission denied
  </code></pre>
  
  <p>What could be the cause of this 'Permission denied'?</p>
  
  <p>I'm running it into an Admin account and it doesn't ask for a password or anything.</p>
  
  <p>Thank you again.</p>