Thanks for the quick answer.
I installed both manually from CVS as the ebuilds don't work correctly on AMD64. The celtutorial.zip I downloaded contain only a pdf and an sxw file of the tutorial text, a file switch.sh, level data and nine folders p1 to p9 with a src subfolder containing app.h, app.cpp and main.cpp and some of them behave.h and behave.cpp. I downloaded it from http://www.crystalspace3d.org/tikiwiki/tiki-index.php?page=CEL+Documentation
(under Local Ressources).
Is there a different tutorial including configure and/or a jamfile?
If not, could you post the one you use (or at least the part needed to compile and link one executable from the respective .cpp and .h files).