easy_install_lxml_error.txt

Searching for lxml
Reading http://pypi.python.org/simple/lxml/
Best match: lxml 3.2.1
Downloading http://pypi.python.org/packages/source/l/lxml/lxml-3.2.1.tar.gz#md5=d183ccd6bbd5ca139e9db9e9a675787e
Processing lxml-3.2.1.tar.gz
Writing /tmp/easy_install-Pg78um/lxml-3.2.1/setup.cfg
Running lxml-3.2.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-Pg78um/lxml-3.2.1/egg-dist-tmp-083BG0
Building lxml version 3.2.1.
Building without Cython.
Using build configuration of libxslt 1.1.24
/usr/local/Cellar/python/2.7.4/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
  warnings.warn(msg)
warning: no files found matching '*.txt' under directory 'src/lxml/tests'
clang: warning: argument unused during compilation: '-flat_namespace'
In file included from src/lxml/lxml.etree.c:314:
/tmp/easy_install-Pg78um/lxml-3.2.1/src/lxml/includes/etree_defs.h:9:10: fatal error: 'libxml/xmlversion.h' file not found
#include "libxml/xmlversion.h"
         ^
1 error generated.
error: Setup script exited with error: command 'cc' failed with exit status 1