Hi, first of all sorry to have been this long to answer.
I just put your source example in a essai.cc, then "g++ -o essai essai.cc -lntl" ; no warning, the resulting executable runs without trouble... but indeed ldd shows I'm linking to libntl44 -- that's pretty normal considering that's what the libntl-dev package points to. Can you tell me more about your system? Cheers, J.Puydt