adopt Constantinos' method:   allow different versions of ifort (8 or 9) and different versions    of mpi (mpich or mpich2) to be used with the same optfile.   requires to load a netcdf module and set MPI_INC_DIR (see comments    inside optfile).
adopt Constantinos' method:
  allow different versions of ifort (8 or 9) and different versions
   of mpi (mpich or mpich2) to be used with the same optfile.
  requires to load a netcdf module and set MPI_INC_DIR (see comments
   inside optfile).

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h