pip install xcffib
You are using pip version 6.0.8, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting xcffib
  Using cached xcffib-0.5.1.tar.gz
    unable to execute 'cc': No such file or directory
    unable to execute 'cc': No such file or directory
        No working compiler found, or bogus compiler options
        passed to the compiler from Python's distutils module.
        See the error messages above.
        (If they are about -mno-fused-madd and you are on OS/X 10.8,
        see http://stackoverflow.com/questions/22313407/ .)
    Traceback (most recent call last):
      File "<string>", line 20, in <module>
      File "/tmp/pip-build-P_AIfA/xcffib/setup.py", line 98, in <module>
        **cffi_args
      File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python2.7/vendor-packages/setuptools/dist.py", line 265, in __init__
        self.fetch_build_eggs(attrs.pop('setup_requires'))
      File "/usr/lib/python2.7/vendor-packages/setuptools/dist.py", line 289, in fetch_build_eggs
        parse_requirements(requires), installer=self.fetch_build_egg
      File "/usr/lib/python2.7/vendor-packages/pkg_resources.py", line 618, in resolve
        dist = best[req.key] = env.best_match(req, self, installer)
      File "/usr/lib/python2.7/vendor-packages/pkg_resources.py", line 862, in best_match
        return self.obtain(req, installer) # try and download/install
      File "/usr/lib/python2.7/vendor-packages/pkg_resources.py", line 874, in obtain
        return installer(requirement)
      File "/usr/lib/python2.7/vendor-packages/setuptools/dist.py", line 339, in fetch_build_egg
        return cmd.easy_install(req)
      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 623, in easy_install
        return self.install_item(spec, dist.location, tmpdir, deps)
      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 653, in install_item
        dists = self.install_eggs(spec, download, tmpdir)
      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 849, in install_eggs
        return self.build_and_install(setup_script, setup_base)
      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 1130, in build_and_install
        self.run_setup(setup_script, setup_base, args)
      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 1118, in run_setup
        raise DistutilsError("Setup script exited with %s" % (v.args[0],))
    distutils.errors.DistutilsError: Setup script exited with 1
    Complete output from command python setup.py egg_info:
    unable to execute 'cc': No such file or directory

    unable to execute 'cc': No such file or directory



        No working compiler found, or bogus compiler options

        passed to the compiler from Python's distutils module.

        See the error messages above.

        (If they are about -mno-fused-madd and you are on OS/X 10.8,

        see http://stackoverflow.com/questions/22313407/ .)

    Traceback (most recent call last):

      File "<string>", line 20, in <module>

      File "/tmp/pip-build-P_AIfA/xcffib/setup.py", line 98, in <module>

        **cffi_args

      File "/usr/lib/python2.7/distutils/core.py", line 111, in setup

        _setup_distribution = dist = klass(attrs)

      File "/usr/lib/python2.7/vendor-packages/setuptools/dist.py", line 265, in __init__

        self.fetch_build_eggs(attrs.pop('setup_requires'))

      File "/usr/lib/python2.7/vendor-packages/setuptools/dist.py", line 289, in fetch_build_eggs

        parse_requirements(requires), installer=self.fetch_build_egg

      File "/usr/lib/python2.7/vendor-packages/pkg_resources.py", line 618, in resolve

        dist = best[req.key] = env.best_match(req, self, installer)

      File "/usr/lib/python2.7/vendor-packages/pkg_resources.py", line 862, in best_match

        return self.obtain(req, installer) # try and download/install

      File "/usr/lib/python2.7/vendor-packages/pkg_resources.py", line 874, in obtain

        return installer(requirement)

      File "/usr/lib/python2.7/vendor-packages/setuptools/dist.py", line 339, in fetch_build_egg

        return cmd.easy_install(req)

      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 623, in easy_install

        return self.install_item(spec, dist.location, tmpdir, deps)

      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 653, in install_item

        dists = self.install_eggs(spec, download, tmpdir)

      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 849, in install_eggs

        return self.build_and_install(setup_script, setup_base)

      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 1130, in build_and_install

        self.run_setup(setup_script, setup_base, args)

      File "/usr/lib/python2.7/vendor-packages/setuptools/command/easy_install.py", line 1118, in run_setup

        raise DistutilsError("Setup script exited with %s" % (v.args[0],))

    distutils.errors.DistutilsError: Setup script exited with 1

    ----------------------------------------
    Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-P_AIfA/xcffib