Hi !
The binary I'm using is a self-compiled Inkscape from the repository 0.49 trunk.
I've checked the objdump ( thanks ! it's very useful ) command and I can see there are several symbols in the executable, but not the one I'm looking for. For instance the SPRect example works also for me.
But when I go to the compilation folder, I can see the cssreader.o file which means that it has been compiled. So I'm confused. Should I compile with some specific options or should the default ./configure and make approach work ?