Compile MPAS on LANTA

Updated: 22 December 2023

1 1. Load required modules and set environment variables
2 2. Download MPAS source code
3 3. Compile MPAS
4 4. Example: Job submission script

1. Load required modules and set environment variables

Paste the below lines into your terminal. (Putting these in ~/.bashrc is not recommended.)

module purge
module purge
module load ParallelIO/2.6.2-cpeIntel-23.09
module load METIS/5.1.0-cpeIntel-23.09

export PIO=${EBROOTPARALLELIO}
export NETCDF=${CRAY_NETCDF_HDF5PARALLEL_PREFIX}
export PNETCDF=${CRAY_PARALLEL_NETCDF_PREFIX}
export OPENMP=true

### Common mistake :: insert spaces before or after =

2. Download MPAS source code

An example for MPAS 8.0.1 is as shown below.

wget https://github.com/MPAS-Dev/MPAS-Model/archive/refs/tags/v8.0.1.tar.gz
tar xzf v8.0.1.tar.gz
mv MPAS-Model-8.0.1 MPAS
cd MPAS

For other version, check https://github.com/MPAS-Dev/MPAS-Model/releases.

3. Compile MPAS

Compile each MPAS core with your desired floating-point precision; for example,

make -j4 intel-nersc CORE=init_atmosphere PRECISION=single AUTOCLEAN=true
make -j4 intel-nersc CORE=atmosphere PRECISION=single AUTOCLEAN=true
...

User still has to use make clean CORE=XXX before recompiling each core.

Additional notes:

CORE=ocean only supports double precision.
CORE=seaice only supports double precision and only serial build (-j1) works.
Users may have to add parentheses for the print function, i.e., print xxx → print(xxx), in
- ./src/core_ocean/BGC/makedep.py
- ./src/core_ocean/cvmix/makedep.py
to make these files compatible with Python3.

4. Example: Job submission script

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