Use python3 in CI && only build as shared lib for Mac arm64

.github/workflows/cibuildwheels.yml

@@ -62,23 +62,23 @@ jobs:
         if: runner.os == 'Windows'
         uses: pypa/[email protected]
         env:
-          CIBW_BEFORE_ALL: python -m pip install cibuildwheel -U
+          CIBW_BEFORE_ALL: python3 -m pip install cibuildwheel -U
           CIBW_BUILD: 'cp38-win_amd64 cp39-win_amd64 cp310-win_amd64 cp311-win_amd64'
-          CIBW_BEFORE_TEST: python -m pip install --upgrade pip && python -m pip install -r requirements-test.txt
+          CIBW_BEFORE_TEST: python3 -m pip install --upgrade pip && python3 -m pip install -r requirements-test.txt
           CIBW_TEST_COMMAND: >
-            cmd /V /C "set BLOSC_TRACE=1 && python -m pytest {project}/tests"
+            cmd /V /C "set BLOSC_TRACE=1 && python3 -m pytest {project}/tests"
 
       - name: Build wheels (Linux / Mac OSX x86_64)
         if: ${{ matrix.os != 'windows-latest' && matrix.arch != 'aarch64' }}
         uses: pypa/[email protected]
         env:
           # The build requirements should be installed by the pyproject.toml specs
-          #CIBW_BEFORE_BUILD: python -m pip install --upgrade pip && python -m pip install -r requirements-build.txt
+          #CIBW_BEFORE_BUILD: python3 -m pip install --upgrade pip && python3 -m pip install -r requirements-build.txt
           CIBW_BEFORE_BUILD_MACOS: CMAKE_OSX_ARCHITECTURES=x86_64
           CIBW_BUILD: 'cp39-* cp310-* cp311-* cp312-*'
-          CIBW_BEFORE_TEST: python -m pip install --upgrade pip && python -m pip install -r requirements-test.txt
+          CIBW_BEFORE_TEST: python3 -m pip install --upgrade pip && python3 -m pip install -r requirements-test.txt
           CIBW_TEST_COMMAND: >
-            BLOSC_TRACE=1 python -m pytest {project}/tests
+            BLOSC_TRACE=1 python3 -m pytest {project}/tests
           CIBW_ARCHS_LINUX: ${{ matrix.arch }}
           CIBW_ARCHS_MACOS: "x86_64"
 

src/CMakeLists.txt

@@ -35,12 +35,15 @@ set(CMAKE_FIND_FRAMEWORK NEVER)
 add_subdirectory(grok)
 
 # Build libblosc2_grok.so
-if (MSVC OR MINGW)
+if (APPLE AND {CMAKE_OSX_ARCHITECTURES} STREQUAL "arm64")
+    add_library(blosc2_grok SHARED blosc2_grok.cpp)
+else()
     add_library(blosc2_grok MODULE blosc2_grok.cpp)
+endif()
+
+if (MSVC OR MINGW)
     # Necessary for compiling blosc2_grok.lib
     set_property(TARGET blosc2_grok PROPERTY WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
-else()
-    add_library(blosc2_grok SHARED blosc2_grok.cpp)
 endif()
 
 include_directories(