macOS

The following instructions have been tested on macOS 15.3 (with Apple M4).

Requirements:

C and Fortran compilers (e.g. gcc/gfortran in GCC)
MPI (e.g. OpenMPI)
BLAS/LAPACK (e.g. Apple Accelerate)
FFTW3
Python3

The dependencies can be installed via Homebrew or compiled manually from source.

Building WEST

WEST executables can be compiled using the following script:

$ cat build_west.sh
#!/bin/bash

export MPIF90=mpif90
export F90=gfortran
export CC=gcc
export BLAS_LIBS="-framework Accelerate"
export LAPACK_LIBS="-framework Accelerate"
export LIBDIRS="-L/PATH/TO/FFTW3/lib"

./configure

# Add -I/PATH/TO/FFTW3/include to IFLAGS if needed
make -j 4 pw

cd West

make conf PYT=python3 PYT_LDFLAGS="`python3-config --ldflags --embed`"
make -j 4 all

To use the script do:

$ bash build_west.sh

Running WEST

We can run the wstat.x WEST executables on 2 cores using the following command:

$ export OMP_NUM_THREADS=1
$ mpirun -np 2 ./wstat.x -i wstat.in > wstat.out