Request: Documentation for PYGTK, as queried by autogen during EOG plugin build

Hello EOG team,

The EOG plugins slideshowshuffle and pythonconsole are disabled by
autogen, apparently because of a failure return of a check on PYGTK.
Log extract:

----- log -----

checking for a Python interpreter with version >= 2.3... python
checking for python... /usr/bin/python
checking for python version... 2.6
checking for python platform... linux2
checking for python script directory... ${prefix}/lib/python2.6/site-packages
checking for python extension module directory...
${exec_prefix}/lib/python2.6/site-packages
checking for PYGTK... no
configure: WARNING: Python not found, disabling python support

---- end log ----

However, both Python and pygtk are installed:

----- Python -----
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pygtk
>>>
----- end Python -----

A grep for PYGTK in the tree rooted from
/usr/share/doc/python-gtk2-doc/html returned no rows.

It appears from the configuration script that PYGTK is an expected
environment variable.  If this is so, what package sets it?  Does the
value matter?

Build platform: Ubuntu 9.04 (Jaunty Jackalope), Gnome 2.26.1

Regards,

Tom

~tlholaday()