FLUKAGUI

Hello
i was trying to install FLUKAGUI and i encountered some problems.the details
are given below
1. i have installed FLUKA and FLAIR
2. I have installed ROOT and set up ROOTSYS properly.
now when i am running ./configure , i am getting error about libg2c.i am
asked to provide proper path to libg2c.
i checked for libg2c and it is installed in usr/lib.now i want to know how
can i provide the proper path to this library.
thank you

-- 
MIR INAMUL HAQ JERI
INSTN SACLAY.
UNIVERSITY OF PARIS SUD 11.