Wait, wait, wait. Don't install anything...you shouldn't have to.

It looks like it compiled correctly, since your "make" output (after it goes into the /src directory) only has the --mode=link part. Maybe you can simply fix the problem by running /sbin/ldconfig as root to tell the linker where the libraries it needs are.

But if that doesn't work, try starting from scratch. Here's a recap:

Unarchive the tarball to your home directory. Install "libwmf-dev". Modify wmfthumbnail-0.2/src/wmfthumbcreator.cpp so the beginning looks like:

Code:
#include "/usr/include/kde/kdebug.h"
#include "/usr/include/qt3/qimage.h"
#include "/usr/include/qt3/qcstring.h"
#include "/usr/include/qt3/qmutex.h"
#include "/usr/include/kde/kpixmap.h"
#include "wmfthumbcreator.h"
#include "/usr/include/math.h"
Modify wmfthumbnail-0.2/src/wmfthumbcreator.h so the beginning looks like:

Code:
#ifndef WMFTHUMBCREATOR_H
#define WMFTHUMBCREATOR_H
#include "/usr/include/libwmf/api.h"
#include "/usr/include/libwmf/gd.h"
#include "/usr/include/qt3/qvaluevector.h"
#include "/usr/include/kde/kio/thumbcreator.h"
(You can verify that the paths to these these *.h files are correct with the "locate" command.)

Run "./configure" and "make" as your normal user. You should only have to run "make install" as root. Or so they say. Dunno if it really matters.

And you definitely should not have to install more than libwmf-dev in order to get this to work on stock Knoppix. Your install and my install should be just about the same!

Note that if "make" ends with an error message, you can skip the "make install" because it knows that make failed and won't do anything.