[SciPy-dev] binary compatibility question

[David Cournapeau]

josef.pktd@gmail.com wrote:
> good, which means I need to start from the beginning.
>   

:)

> I'm using the virtualenv to run different versions, but not to build.
> With earlier versions of virtualenv it wasn't possible to build
> extension in a virtualenv on Windows, but I haven't tried this in half
> a year or so.
>   

Ah, yes, sorry, I forgot. You're right, it does not work to build python
extensions - you have to install virtualenv from sources, where this is
fixed. To make things even more fun, the last svn version is broken. I
don't remember the exact number and my windows vm is shut down, but if
you look at the svn revision log, somewhere around beginning of april,
there is a mention on that fact - get this version, it works. Once you
get the right version, installing is a breeze, though, just python
setup.py bdist_wininst  + executing the installer.

> To build against numpy 1.2.1, I replaced numpy in pythons  sitepackages.
>   

Yes, but this breaks eventually, because you always forget to update it
at some point. That's why things like controlled environments are
better. On windows, virtualenv is the only tool I know of which can do
that painlessly for python.

David