tcl/tk install problems

Folks,

I am trying to install, in a private 'space', 0.98.3 on a linux x86-64 scientific cluster on which I am not the admin. tcl/tk is indeed installed, and I know where they are. matplotlib cannot find them. When running 'python setup.py build', tclConfig.sh and tkConfig.sh are on the path.

It seems tcl/tk detection is a persistent issue, from searching the web. My head hurts right now on this, so I hope there's some kind of an answer.

Some output:

···

python setup.py build

============================================================================
BUILDING MATPLOTLIB
             matplotlib: 0.98.3
                 python: 2.5.2 (r252:60911, Sep 25 2008, 16:58:03) [GCC
                         4.1.2 20071124 (Red Hat 4.1.2-38)]
               platform: linux2

REQUIRED DEPENDENCIES
                  numpy: 1.1.1
              freetype2: 9.10.3

OPTIONAL BACKEND DEPENDENCIES
                 libpng: 1.2.10
                Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
                         * Guessing the library and include directories for
                         * Tcl and Tk because the tclConfig.sh and
                         * tkConfig.sh could not be found and/or parsed.
                   Gtk+: no
                         * Building for Gtk+ requires pygtk; you must be able
                         * to "import gtk" in your build/install environment
                     Qt: no
                    Qt4: no
                  Cairo: no