ROOT 3.02/06 and GiNaC 1.0.3

I am an unexperienced user of root, cint or ginac, which latest available versions I installed on my Linux 2.4.2 (ROOT 3.02/06 and GiNaC 1.0.3). I tried to interprete the simple GiNaC hello.cc example (from the Tutorial) with cint and root/cint, but the interpreter complains that library_init() is declared, but not defined. It is defined in utils.cpp. I tried to "gSystem->Load("libginac.so");" in root, but if I' lucky, the new cint error message in root is "~library_init() declared, but not defined" (~library_init() does in fact no seem to be defined). Could anybody give me a hint, what I should do? Thanks Hans Peter