Getting started with F90 on the Crays

Help me, I'm converting! . . .

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Juli Rew
by Juli Rew


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We recently began encouraging NCAR's Cray users to move to the newer compilers, particularly Fortran 90. Here are a few basic tips to help you get started using F90 on the Crays.


Using the compilers

What should you do to use the compilers on the Cray? Under UNICOS 9, you must add some initialization information to your startup files to use the compilers and libraries. This is called "setting up your Cray Programming Environment" or "setting up your modules environment."

  • csh/tcsh users:

    Put this in your .cshrc (after any other path or manpath stuff): 

       source /opt/modules/modules/init/csh
   module load modules PrgEnv nqe

  • sh/ksh users:

    Put this in your .profile (after any other path or manpath stuff): 

       . /opt/modules/modules/init/ksh
   module load modules PrgEnv nqe


Fortran 90 info on the Web

The SCD Consultants have set up a Web site under ConsultWeb containing extensive information on Fortran 90. This information includes language changes, new features, compiling examples, a Fortran 90 tutorial, a Frequently Asked Questions (FAQ) list, and tips for converting from Fortran 77 and CF77.

The information is available at:

If you have questions about Fortran 90, you can also call the consultants at 303-497-1278 or send e-mail to consult1@ncar.ucar.edu.

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