Update GitHub actions yaml

Author: Martin Urban

.gitignore

@@ -185,3 +185,4 @@ cython_debug/
 /pymol/
 /pre-built/macos/lib_64/
 /pre-built/linux/lib_64/
+/cmake-build-release-arm64/

CMakeLists.txt

@@ -1,6 +1,19 @@
 cmake_minimum_required(VERSION 3.13)
 project(_cmd)
 
+if (${CMAKE_OSX_ARCHITECTURES} STREQUAL "arm64")
+    message("Build for arm64 macOS")
+    # Here is knowledge about arm64 macOS needed
+    find_package(Python3 ${PYTHON_VER} EXACT COMPONENTS Development REQUIRED)
+    set(LIB_DIR ${CMAKE_SOURCE_DIR}/vcpkg_installed/arm64-osx/lib)
+    set(PY_LIB Python3::Python)
+else ()
+    message("Build for x86_64 macOS")
+    find_package(Python3 ${PYTHON_VER} EXACT COMPONENTS Development REQUIRED)
+    set(PY_LIB Python3::Python)
+    set(LIB_DIR ${CMAKE_SOURCE_DIR}/vcpkg_installed/x64-osx/lib)
+endif ()
+
 set(CMAKE_VERBOSE_MAKEFILE on)
 
 set(ALL_SRC
@@ -253,9 +266,6 @@ set(ALL_COMP_ARGS
 )
 target_compile_options(_cmd PRIVATE ${ALL_COMP_ARGS})
 
-# Set Python paths manually
-find_package(Python3 ${PYTHON_VER} EXACT COMPONENTS Development REQUIRED)
-
 #set(SHARED_SUFFIX .cpython-311-darwin.so)
 set_target_properties(_cmd PROPERTIES SUFFIX ${SHARED_SUFFIX})
 
@@ -298,15 +308,12 @@ set (ALL_INC_DIR
 
 target_include_directories(_cmd PUBLIC ${ALL_INC_DIR})
 
-target_link_directories(_cmd PRIVATE ${CMAKE_SOURCE_DIR}/vcpkg_installed/x64-osx/lib)
-target_link_options(_cmd PRIVATE
-        -framework OpenGL
-        #-undefined dynamic_lookup
-)
+target_link_directories(_cmd PRIVATE ${LIB_DIR})
+target_link_options(_cmd PRIVATE -framework OpenGL)
 
 target_link_libraries(
         _cmd PRIVATE
-        PNG::PNG freetype xml2 GLEW netCDF::netcdf OpenGL::GL Python3::Python
+        PNG::PNG freetype xml2 GLEW netCDF::netcdf OpenGL::GL ${PY_LIB}
 )
 
 set(ALL_DEF

README.md

@@ -112,6 +112,16 @@ icon in the bottom left panel and click on the `Gear icon > CMake Settings`)
 5. **Optional**: If you now run `./run_automation.sh build-wheel` the new 
 wheel file will automatically use your self built `_cmd` module.
 
+## arm64 builds
+Currently, arm64 builds are **not** supported. However, it is worked on,
+to support this kind of architecture.
+
+### CPython under arm64
+To build the _cmd module a CPython version that is build for amr64 
+is necessary. For intel-based Macs CPython has to be compiled from source.
+To do this clone the cpython repo and checkout this commit hash:
+`d03b868578a29d9d64f829459b584eed48862056`
+
 ## Roadmap
 Until now the build wheel file can only be used with Python 3.11.
 The plan for the future is to support multiple different Python versions.