Cannot use newly installed MPICH mpich-3.2.1 on Ubuntu 14.04

Question

I intalled mpich-3.2.1 following the installation guide on MPICH. There were no errors popping up during the installation. I added the bin subdirectory of my installation directory to my path and source it, However, the command which mpicc refers to the commands in openmpi which is the defaut mpi in Ubuntu 14.04.

Could somebody tell me how to make the newly installed mpich3 work? Thanks a lot.

Answer 1

I figured it out that the path referencing to the new mpich should be exported before /usr/bin where the openmpi-related commands locate in.