Error in compiler aliasing

Dear all,

First of all I am not a programmer so please excuse me if I use some improper terms.

I am trying to compile the hdf5 libraries under ubuntu 16.04 with Intel Parallel Studio XE 2018, but whenever I configure them, in the configure output I read:

compiler 'icc' is Intel icc-18.0.1.163
compiler 'ifort' is Intel ifort-18.0.1.163
compiler 'icpc' is GNU g++-5.0.0

My environment variables are set up under /home/.bashrc and are as follows

source /opt/intel/parallel_studio_xe_2018.1.038/bin/psxevars.sh
source /opt/intel/compilers_and_libraries_2018.1.163/linux/bin/compilervars.sh intel64
export CC=icc
export CXX=icpc
export CPP='icc -E' 
export F77=ifort
export FC=ifort

Also this is the reply of the which command:

chertan@chertan-UX310UQ:~/Software/Installers/hdf5-1.10.1$ which icpc
/opt/intel/compilers_and_libraries_2018.1.163/linux/bin/intel64/icpc

I generally use cmake-gui to be sure to point to the correct compilers, but I cannot in this case, and I have to make sure that hdf is compiled with intel. Why does my environment sets icpc to g++? There's no environmental variable pointing to that!

Thanks!