create a macos-arm64 preset

Author: jathu

CMakeLists.txt

@@ -48,6 +48,8 @@ project(executorch)
 # MARK: - Start EXECUTORCH_H12025_BUILD_MIGRATION --------------------------------------------------
 
 include(${PROJECT_SOURCE_DIR}/tools/cmake/common/preset.cmake)
+
+load_build_preset()
 include(${PROJECT_SOURCE_DIR}/tools/cmake/preset/default.cmake)
 
 # Print all the configs that were called with announce_configured_options.

CMakePresets.json

@@ -0,0 +1,33 @@
+{
+  "version": 10,
+  "cmakeMinimumRequired": {
+    "major": 3,
+    "minor": 31,
+    "patch": 0
+  },
+  "$comment": "On-device AI across mobile, embedded and edge for PyTorch.",
+  "configurePresets": [
+    {
+      "name": "common",
+      "hidden": true,
+      "binaryDir": "${sourceDir}/cmake-out",
+      "generator": "Unix Makefiles"
+    },
+    {
+      "name": "macos-arm64",
+      "inherits": ["common"],
+      "generator": "Xcode",
+      "cacheVariables": {
+        "CMAKE_TOOLCHAIN_FILE": "${sourceDir}/third-party/ios-cmake/ios.toolchain.cmake",
+        "EXECUTORCH_BUILD_PRESET_FILE": "${sourceDir}/tools/cmake/preset/macos-arm64.cmake",
+        "PLATFORM": "MAC_ARM64",
+        "DEPLOYMENT_TARGET": "10.15"
+      },
+      "condition": {
+        "lhs": "${hostSystemName}",
+        "type": "equals",
+        "rhs": "Darwin"
+      }
+    }
+  ]
+}

tools/cmake/Utils.cmake

@@ -317,6 +317,11 @@ function(resolve_python_executable)
         python
         PARENT_SCOPE
     )
+  elseif(DEFINED ENV{VIRTUAL_ENV})
+    set(PYTHON_EXECUTABLE
+      $ENV{VIRTUAL_ENV}/bin/python3
+      PARENT_SCOPE
+    )
   else()
     set(PYTHON_EXECUTABLE
         python3

tools/cmake/common/preset.cmake

@@ -91,3 +91,16 @@ macro(set_overridable_option NAME VALUE)
 
   set(${NAME} ${VALUE} CACHE STRING "")
 endmacro()
+
+# Detemine the build preset and load it.
+macro(load_build_preset)
+  if(EXECUTORCH_BUILD_PRESET_FILE)
+    announce_configured_options(EXECUTORCH_BUILD_PRESET_FILE)
+    message(STATUS "Loading build preset: ${EXECUTORCH_BUILD_PRESET_FILE}")
+    include(${EXECUTORCH_BUILD_PRESET_FILE})
+  else()
+    # For now, just continue if the preset file is not set. In the future, we will
+    # try to determine a preset file.
+    # message(WARNING "Unable to determine build preset with CMAKE_SYSTEM_NAME (${CMAKE_SYSTEM_NAME}) and CMAKE_SYSTEM_PROCESSOR (${CMAKE_SYSTEM_PROCESSOR}). Using default build settings.")
+  endif()
+endmacro()