[Distutils] virtual env with exec prefix

[Hans Meine]

Hi Ian,

recently I reported this problem to you:
> [...] here at our university, python (as
> well as hundreds of other software packages) is installed in a shared NFS
> tree with a clear separation of --prefix and --exec-prefix, i.e. all
> platform-specific stuff goes into the according subdirectories.  [...]

> [2] meine at kogspc33:~ -> virtualenv enthought-inst
> New python executable in enthought-inst/bin/python
> Installing setuptools....
>   Complete output from command enthought-inst/bin/python -c "#!python
> \"\"\"Bootstrap setuptoo...
>
>
>
>
> " /software/python-2.4.4/SuSE-10...4.egg:
>   error: invalid Python installation: unable to
> open /software/python-2.4.4/lib/python2.4/config/Makefile (No such file or
> directory)
>
> [The message] is right, because it should be
>   /software/python-2.4.4/SuSE-10.2/lib/python2.4/config/Makefile
> which exists (in the SuSE-10.2 directory).

I have now debugged this a little bit (using virtualenv from SVN), and it 
seems to be a problem with the virtualenv'd python and setuptools.  I have 
written the EZ_SETUP_PY to disk, and when I mimick virtualenv's command for 
installing setuptools, I get the error:

[2] meine at kogspc33:~/Programming/enthought -> 
inst/bin/python ../ez_setup.py -v /home/meine/Programming/virtualenv-svn/support-files/setuptools-0.6c8-py2.4.egg
error: invalid Python installation: unable to 
open /software/python-2.4.4/lib/python2.4/config/Makefile (No such file or 
directory)

(NB: inst is the virtual env) OTOH, when I run this with the python binary 
from its original location, it works fine.  Since the error comes from deep 
within setuptools (AFAICS), should this be discussed on distutils-sig?

Ciao, /  /
     /--/
    /  / ANS