Hello Albretch.

I would suggest that you try the following. Since you did not tell your Knoppix version tcl and tk versions may differ.
Code:
sudo apt-get update
sudo apt-get -t testing install tcl8.6-dev tk8.6-dev
./configure --with-tk=/usr/lib/i386-linux-gnu/tk8.6 --with-tcl=/usr/lib/i386-linux-gnu/tcl8.6
Read http://askubuntu.com/questions/37248...alling-wordnet (last answer)
Code:
chmod u+w src/stubs.c
Edit src/stubs.c as described on the page mentioned.
Run "make" and "sudo make install".