GNU Compilers and OpenMPI
==========================

GCC 11.5.0 is available by default.
In addition, you can use the following OpenMPI by configuring the environment.
For more details, see each manual.

.. csv-table::
   :header: "Version", "Module file"

   "Open MPI 4.1.8", "openmpi/4.1.8_cpu"
   "Open MPI 4.1.8 CUDA 12.8 aware", "openmpi/4.1.8_gpu"

・Example

.. code-block :: none

  $ gcc --version
  gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-5)
  Copyright (C) 2021 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

.. code-block :: none

  $ module avail openmpi
  ------------------------------------------------ /work/app/modulefiles/openmpi -------------------------------------------------
  openmpi/4.1.8_cpu  openmpi/4.1.8_gpu  

  Key:
  modulepath
  $

・to use OpenMPI on the super

.. code-block :: none

  $ module load openmpi/4.1.8_cpu
  $ mpirun --version
  mpirun (Open MPI) 4.1.8

  Report bugs to http://www.open-mpi.org/community/help/
  $

・to use OpenMPI on the gpu
(cuda/12.8 module will be loaded automatically.)

.. code-block :: none

  $ module load openmpi/4.1.8_gpu 
  Loading openmpi/4.1.8_gpu
    Loading requirement: cuda/12.8
  $ mpirun --version
  mpirun (Open MPI) 4.1.8

  Report bugs to http://www.open-mpi.org/community/help/
  $