Python 2.7 unable to find it's header files in virtualenv

Note that calling get_config_h_filename() again actually succeeds.

It looks like this bug has been fixed in upstream 1.6.4. Rather than cherry pick the fix, I think it's better to just upgrade our version. I have a branch for this, which I'll push momentarily.

Do you plan to backport to 11.04?

Also: https://bugs.launchpad.net/ubuntu/+source/python-virtualenv/+bug/820792

This is a problem in Precise with projects that have a setup_requires.

root@bare-precise-hpcloud-b1-1:~# virtualenv /usr/local/zuul-env
New python executable in /usr/local/zuul-env/bin/python
Installing setuptools, pip...done.
root@bare-precise-hpcloud-b1-1:~# /usr/local/zuul-env/bin/pip install /tmp/zuul >local-log 2>&1

/usr/local/zuul-env/local/lib/python2.7/site-packages/pip/pep425tags.py:62: RuntimeWarning: invalid Python installation: unable to open /usr/zuul-env/lib/python2.7/config/Makefile (No such file or directory)
  warnings.warn("{0}".format(e), RuntimeWarning)
Unpacking /tmp/zuul
  Running setup.py (path:/tmp/pip-cLt2Eg-build/setup.py) egg_info for package from file:///tmp/zuul
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/tmp/pip-cLt2Eg-build/setup.py", line 22, in <module>
        pbr=True)
      File "/usr/lib/python2.7/distutils/core.py", line 112, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/setuptools/dist.py", line 260, in __init__
        self.fetch_build_eggs(attrs.pop('setup_requires'))
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/setuptools/dist.py", line 285, in fetch_build_eggs
        replace_conflicting=True
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/pkg_resources.py", line 631, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/pkg_resources.py", line 871, in best_match
        return self.obtain(req, installer)
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/pkg_resources.py", line 883, in obtain
        return installer(requirement)
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/setuptools/dist.py", line 333, in fetch_build_egg
        cmd.ensure_finalized()
      File "/usr/lib/python2.7/distutils/cmd.py", line 109, in ensure_finalized
        self.finalize_options()
      File "/usr/local/zuul-env/local/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 212, in finalize_options
        prefix, exec_prefix = get_config_vars('prefix', 'exec_prefix')
      File "/usr/lib/python2.7/sysconfig.py", line 476, in get_config_vars
        _init_posix(_CONFIG_VARS)
      File "/usr/lib/python2.7/sysconfig.py", line 344, in _init_posix
        raise IOError(msg)
    IOError: invalid Python installation: unable to open /usr/zuul-env/lib/python2.7/config/Makefile (No such file or directory)

lucid has seen the end of its life and is no longer receiving any updates. Marking the lucid task for this ticket as "Won't Fix".