macOS

prerequisites

The following packages must be installed first:

  • gfortran

  • cmake

  • ninja

  • perl

These packages can be installed using system package managers such as Homebrew, MacPorts and Fink. Here, we will use Homebrew. You may install Homebrew first (visit its homepage, copy the installation command, open a terminal and paste it into your terminal, and press Enter) or update it: brew update.

With the command brew list you can check the installed packages (or formulae) on your macOS. If desired, upgrade these packages first by typing brew upgrade. Below are the instructions for installing the required packages.

First, install GCC (GNU Compiler Collection) that includes gfortran by opening a terminal (Applications > Utilities and search for the Terminal app) and typing the following command

brew install gcc

To verify the installation, type which gfortran in the terminal. It should return a path where gfortran has been installed. On Apple Silicon, the compiler will be installed into the folder /opt/homebrew/bin/, while on an older Intel Mac, it will be installed in /usr/local/bin.

Alternatively, type gfortran --version in the terminal. It should return a version number.

Next, open a terminal and run the following command

brew install cmake

and then

brew install ninja

These commands will installed CMake and ninja on your machine.

Usually, perl is pre-installed on macOS. This can be checked with the command perl -v. Otherwise, you may install it by running the command brew install perl.

verify installations

Verify the required installations by checking their versions, as follows

gfortran --version

cmake --version

ninja --version

perl --version

If no error is reported, then the installation was successful.

Important

  • The CMake version must be at least 3.20 or newer.

  • The perl version is 5 or higher.

installation SWASH

Once the prerequisites are taken care of, installing SWASH on your machine is a four-step process.

  1. download SWASH

Open a Terminal app, copy the command below to paste into the terminal, and press Enter.

git clone https://gitlab.tudelft.nl/citg/wavemodels/swash.git && cd swash

  1. configure SWASH

make config

  1. build SWASH

make

  1. install SWASH

make install

SWASH is installed at folder $HOME/wavemodels/swash by default. To run SWASH, you need to make sure that the /bin folder in this directory is added to your system’s PATH. Open the terminal and enter

export PATH=$PATH:$HOME/wavemodels/swash/bin

You can check the new value of PATH by echoing it: echo $PATH. However, to set this permanently, you need to add it to your ~/.bash_profile (or ~/.bashrc file), as follows

echo export PATH=$PATH:$HOME/wavemodels/swash/bin >> ~/.bash_profile

options for configuring SWASH

If desired, the build can be configured by passing one or more options below to make config.

fc=<compiler>

the Fortran90 compiler to use [default is determined by CMake]

mpi=on

enable build of SWASH with MPI [off by default]

prefix=<folder>

set the installation folder [$HOME/wavemodels/swash by default]

For example, the following command

make config fc=gfortran prefix=/usr/local/swash

will configure SWASH to be built using gfortran and then install it at /usr/local/swash.

building with MPI support

The SWASH source code also supports memory-distributed parallelism for high performance computing applications. A message passing approach is employed based on the Message Passing Interface (MPI) standard that enables communication between independent processors.

Popular implementations are Open MPI and MPICH. The first one is typically offered by the package managers of Linux and macOS and can be combined with GCC such as gfortran. The easiest way to install Open MPI is by using the Homebrew package manager.

Before installing Open MPI, make sure that your system is up to date and that GCC has been installed, see prerequisites. To install Open MPI, run

brew install openmpi

To verify whether the installation was successful, run the following command

ompi_info --version

or

mpirun --version

Once Open MPI is operational, we proceed to build SWASH. First, we configure SWASH to be built with support for Open MPI, as follows

make config fc=mpifort mpi=on

The actual building is done by typing

make

Finally, to install SWASH, run the following command

make install

SWASH is now ready for high performance computing.

clean up

To remove all files installed by make install, type the following command

make uninstall

If you want to remove the build directory and all files that have been created after running make or make build, then run

make clobber