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Installation — macOS

Tested on Apple Silicon (M1, M2) with Homebrew. Apple's Accelerate framework provides BLAS / LAPACK; no system MPI required for CPU builds.

System packages

brew install cmake llvm
brew install open-mpi          # only for MPI builds

Vendored dependencies

Follow common.md for GKlib + METIS + ParMETIS, Kokkos serial, SymEngine + text2code.

$MPI_PREFIX for ParMETIS is $(brew --prefix open-mpi) (e.g. /opt/homebrew/Cellar/open-mpi/5.0.8).

GPU on macOS

Apple Silicon has no CUDA or HIP support. CPU builds are the only backend on macOS.

Build Exasim

CPU only:

cd $EXASIM
cmake -S install -B build_cpu \
    -DEXASIM_CUDA=OFF -DEXASIM_HIP=OFF \
    -DEXASIM_MPI=OFF  -DEXASIM_NOMPI=ON \
    -DKokkos_DIR=$EXASIM/kokkos/buildserial/lib/cmake/Kokkos \
    -DEXASIM_BUILD_LIBRARY_EXAMPLES=ON
cmake --build build_cpu -j8

CPU + MPI:

PATH=$(brew --prefix open-mpi)/bin:$PATH \
    cmake -S install -B build_mpi \
    -DEXASIM_CUDA=OFF -DEXASIM_HIP=OFF \
    -DEXASIM_MPI=ON   -DEXASIM_NOMPI=OFF \
    -DWITH_PARMETIS=ON \
    -DKokkos_DIR=$EXASIM/kokkos/buildserial/lib/cmake/Kokkos \
    -DEXASIM_BUILD_LIBRARY_EXAMPLES=ON \
    -DMPI_CXX_COMPILER=$(brew --prefix open-mpi)/bin/mpicxx \
    -DMPI_C_COMPILER=$(brew --prefix open-mpi)/bin/mpicc
PATH=$(brew --prefix open-mpi)/bin:$PATH cmake --build build_mpi -j8

Verification

ctest --test-dir build_cpu -R "poisson2d:.*:cpu" -j 4