The MMM Toy Model consists of a main program that invokes a physics driver over a small number of iterations. The physics driver makes calls to various physics schemes that come from a separate repository.
At build time, an attempt is made to obtain a specified version of phyics
schemes using the src/import_physics.sh script. Switching between versions of
physics or between physics repositories is accomplished by setting the variables
physics_version and physics_repo near the top of the src/import_physics.sh
script.
Running make with either gnu or intel specified as the target will compile
the toy model with the GNU or Intel compilers, respectively. For example:
make gnu
The build process will automatically download the physics schemes, or report if the requested physics schemes cannot be obtained.