If your $ARCH and $EC_ARCH environment variables end with
the _CUSTOM extension, then the COMM model installation will need
to be tweaked before the model can be built or run. The makefiles
provided with the COMM model distribution only cover a limited number of architectures and
no _CUSTOM extension Makefile_* exists.
cd /home/armnlib/ssm/all/share/models/GEMDM/v_3.2.2Makefile_* most
closely matches your platform's architecture. For this example, we will use
Makefile_Linux_pgi611.cp Makefile_Linux_pgi611 Makefile_${EC_ARCH}_CUSTOM.