The cttsetup.csh and cttsetup.sh files set many environment variables and
     shell aliases/functions.  The following is a list of what is useful to the
     Fortran 90 MP Library user.  Several other variables are set that are used
     internally by other IMSL Computational Technology Toolkit products.
    

     -------------------------------------------------------------------------
     Note:  Many of these environment variable/aliases are not set up by
            f90setup.sh/f90setup.csh.
     -------------------------------------------------------------------------
    
         $CTT_FORTRAN_COMPILER  - The compiler that the object libraries
                                  were compiled under. (An exception would
                                  be if you installed from source code and
                                  you did not update this environment variable)
         $CTT_EXAMPLES          - directory which contains the example programs
         $CTT_OS_VERSION        - The operating system that the object libraries
                                  were compiled under. (An exception would
                                  be if you installed from source code and
                                  you did not update this environment variable)
         $F90                   - Fortran 90 compiler
         $MPIF90                - MPI Fortran 90 compiler
         $F90FLAGS              - Fortran 90 compiler options
         $FC                    - Fortran 77 compiler
         $FFLAGS                - Fortran 77 compiler options
         $CTT_EXAMPLES          - directory which contains the example programs
         $LINK_F90_SHARED       - Link options required to link with the shared
                                  Fortran 90 MP Library (does not require MPI
                                  library,  uses scalar error handler)
         $LINK_F90_STATIC       - Link options required to link with the static
                                  Fortran 90 MP Library (does not require MPI
                                  library,  uses scalar error handler)
         $LINK_F90              - By default, set to $LINK_F90_SHARED
         $LINK_FNL_SHARED       - Link options required to link with the shared
                                  Fortran Numerical Libraries (does not require
                                  MPI library,  uses scalar error handler)
         $LINK_FNL_STATIC       - Link options required to link with the static
                                  Fortran Numerical Libraries (does not require
                                  MPI library,  uses scalar error handler)
         $LINK_FNL              - By default, set to $LINK_FNL_SHARED
         $LINK_MPI              - Link options required to link with the static
                                  Fortran 90 MP Library (requires MPI library)
                                  This LINK environment variable uses the
                                  parallel IMSL error handler.  The parallel
                                  IMSL error handler is designed to behave
                                  correctly in an MPI environment.
         $LINK_MPIS             - Link options required to link with the static
                                  Fortran 90 MP Library (requires MPI library)
                                  This LINK environment variable uses the
                                  scalar IMSL error handler.  The scalar IMSL
                                  error handler is not designed to behave
                                  correctly in an MPI environment. i.e. error
                                  messages may be scrambled.  A typical user
                                  will want to use the LINK_MPI environment
                                  variable. The LINK_MPIS environment
                                  variable is provided for specialized
                                  applications.
         $VNI_LICENSE_NUMBER    - Contains your license number.

     -------------------------------------------------------------------------
     Note:  The F90FLAGS or FFLAGS variables do not include any optimization
            or debugging options.
     -------------------------------------------------------------------------