All Pathscale MPI tools are in /opt/openmpi/tcp-path


/opt/openmpi/tcp-path/bin/mpif77   prog.f    -o a.out
/opt/openmpi/tcp-path/bin/mpif90   prog.f90  -o a.out
/opt/openmpi/tcp-path/bin/mpicc    prog.c    -o a.out

/opt/openmpi/tcp-path/bin/mpirun -np 2 ./a.out