Cross-compilation for MacOS 12 arm64.

.github/workflows/build-test-publish.yml

@@ -40,9 +40,9 @@ jobs:
  - os: macos-11
  arch: x86_64
  fflags: -march=x86-64 -mavx
-# - os: macos-11
-# arch: arm64
-# fflags: -march=armv8.5-a
+ - os: macos-12
+ arch: arm64
+ fflags: -march=armv8.5-a
  python:
  - version: "3.8"
  cp: cp38
@@ -79,11 +79,12 @@ jobs:
  run: gfortran --version
 
  - name: Build wheels
+ if: ${{ matrix.platform.arch != 'arm64' }}
  uses: pypa/cibuildwheel@v2.9.0
  env:
  CIBW_BUILD: ${{ matrix.python.cp }}-*
  CIBW_BUILD_VERBOSITY: 3
- CIBW_ENVIRONMENT: NPY_DISTUTILS_APPEND_FLAGS=1 FFLAGS='${{ matrix.platform.fflags }}'
+ CIBW_ENVIRONMENT: FFLAGS='${{ matrix.platform.fflags }}'
  CIBW_SKIP: "*-musllinux_*"
  CIBW_ARCHS: ${{ matrix.platform.arch }}
  CIBW_BEFORE_TEST_LINUX: |
@@ -94,6 +95,62 @@ jobs:
  CIBW_TEST_COMMAND: pytest {package}/tests
  PYTHONFAULTHANDLER: "1"
 
+ - name: Build macosx_arm64
+ # This is solely used to build macosx_arm64. As soon as Github Actions make
+ # MacOS arm64 runners available, it should be removed. Adapted from scipy's CI.
+ if: ${{ matrix.platform.os == 'macos-12' && matrix.platform.arch == 'arm64' }}
+ run: |
+ set -ex
+ # Update license
+ cat tools/wheels/LICENSE_osx.txt >> LICENSE.txt
+
+ export PLAT="arm64"
+ export _PYTHON_HOST_PLATFORM="macosx-12.0-arm64"
+ export CROSS_COMPILE=1
+ # Need macOS >= 11 for arm compilation.
+ export MACOSX_DEPLOYMENT_TARGET=11.0
+
+ # SDK root needs to be set early, installation of gfortran/openblas
+ # needs to go in the correct location.
+ export SDKROOT=/Applications/Xcode_13.2.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.1.sdk
+ export ARCHFLAGS=" -arch arm64 "
+
+ source tools/wheels/gfortran_utils.sh
+ export MACOSX_DEPLOYMENT_TARGET=11.0
+
+ # The install script requires the PLAT variable in order to set
+ # the FC variable
+ export PLAT=arm64
+ install_arm64_cross_gfortran
+ export FC=$FC_ARM64
+ export PATH=$FC_LOC:$PATH
+
+ export FFLAGS=" -arch arm64 $FFLAGS"
+ export LDFLAGS=" $FC_ARM64_LDFLAGS $LDFLAGS -L/opt/arm64-builds/lib -arch arm64"
+ sudo ln -s $FC $FC_LOC/gfortran
+ echo $(type -p gfortran)
+
+ # having a test fortran program has helped in debugging problems with the
+ # compiler environment.
+ $FC $FFLAGS tools/wheels/test.f $LDFLAGS
+ ls -al *.out
+ otool -L a.out
+
+ export PKG_CONFIG_PATH=/opt/arm64-builds/lib/pkgconfig
+ export PKG_CONFIG=/usr/local/bin/pkg-config
+ export CFLAGS=" -arch arm64 $CFLAGS"
+ export CXXFLAGS=" -arch arm64 $CXXFLAGS"
+ export LD_LIBRARY_PATH="/opt/arm64-builds/lib:$FC_LIBDIR:$LD_LIBRARY_PATH"
+
+ # install dependencies for the build machine
+ pipx run build --wheel
+
+ # Enables delocate to find the libopenblas/libgfortran libraries.
+ export DYLD_LIBRARY_PATH=/opt/gfortran-darwin-arm64/lib/gcc/arm64-apple-darwin20.0.0/10.2.1:/opt/arm64-builds/lib
+ pip3 install delocate
+ delocate-listdeps dist/pysimulators*.whl
+ delocate-wheel --require-archs=arm64 -k -w wheelhouse dist/pysimulators*.whl
+
  - uses: actions/upload-artifact@v3
  with:
  path: ./wheelhouse/*.whl

pyproject.toml

@@ -2,7 +2,7 @@
 build-backend = "setuptools.build_meta"
 requires = [
  "oldest-supported-numpy",
- "pchanial-legacy-install-hooks>=1.3",
+ "pchanial-legacy-install-hooks>=1.5",
  "setuptools==64.0.3",
  "setuptools_scm[toml]>=6.2",
  "wheel",