the first thing that comes to mind is that you may have compiled the PPL library with one compiler (e.g., g++-2.96.98) and the program test.cpp with another one (e.g., g++-3.0.3). I say this because your link command starts with `g++-3.0', whereas the configuration and compilation mechanism of the PPL has probably invoked `g++'.
You're right, it was due to my compiler. I recompiled GMP with my g++-3.0, recompiled PPL, recompiled my test program, and now everything seems to work just fine. I was pretty sure i compiled PPL with the -with-cxx=g++-3.0 flag, but maybe i was wrong.
Thanks a lot for all your help,
Remko
PS: I haven't got around to using the library yet due to the problems i had, but i can already tell that the documentation (generated with doxygen) looks very good and seems very clear. I'll let you know if i have suggestions for additions to the library.