Problem migrating to EM64T

[emilbarton <bartonemil@xxxxxxxxx>]

Hello,
I've changed my cpu for an EM64T (core 2) and installed a new Linux
system, but now after having recompiled my code I obtain lots of
output like :
      "14689:     symbol=fprintf;  lookup in file=./myprogram [0]"
at the end of the normal output of my program (when it does not simply
end with a segfault).

I'm using gcc 4.3.1. and compilation runs ok. What could I do to get
rid of this ?
Thank you in advance for your help.