Linking to a complex number library in g++

I am trying to get a C++ software, written to work with the xlC compiler, to work with g++. The Makefile of the original file has:

LIB = -lcomplex -L[address_to_user_folder] -lm

My concern is how to change the above line to work with g++ (I have already changed the compiler type in the first line: CC = g++. Also assuming no more changes are necessary.)

I tried this:

LIB = -lcomplex -lm

and received this error:

/usr/bin/ld: cannot find -lcomplex

I wonder if -lcomplex is valid in g++. If yes, why do I receive this error, and if not, how can I link to a complex number library in my Makefile?