Having some fun with XCode

cmake/TaichiCAPI.cmake

@@ -46,7 +46,12 @@ if(TI_BUILD_TESTS)
 endif()
 
 add_library(${TAICHI_C_API_NAME} SHARED ${C_API_SOURCE})
-target_link_static_library(${TAICHI_C_API_NAME} taichi_core)
+if (${CMAKE_GENERATOR} STREQUAL "Xcode")
+  target_link_libraries(${TAICHI_C_API_NAME} PRIVATE taichi_core)
+  message(WARNING "Static wrapping does not work on Xcode, using object linking instead.")
+else()
+  target_link_static_library(${TAICHI_C_API_NAME} taichi_core)
+endif()
 target_enable_function_level_linking(${TAICHI_C_API_NAME})
 
 # Strip shared library

cmake/TaichiCXXFlags.cmake

@@ -42,7 +42,7 @@ if (WIN32)
 else()
     if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
         message("Clang compiler detected. Using std=c++17.")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -fsized-deallocation -Wno-deprecated-declarations")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -fsized-deallocation -Wno-deprecated-declarations -Wno-shorten-64-to-32")
     elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
         message("GNU compiler detected. Using std=c++17.")
         message(WARNING "It is detected that you are using gcc as the compiler. This is an experimental feature. Consider adding -DCMAKE_CXX_COMPILER=clang argument to CMake to switch to clang (or MSVC on Windows).")

setup.py

@@ -110,6 +110,7 @@ def get_cmake_args():
     cmake_args = shlex.split(os.getenv('TAICHI_CMAKE_ARGS', '').strip())
 
     use_msbuild = False
+    use_xcode = False
 
     if (os.getenv('DEBUG', '0') in ('1', 'ON')):
         cfg = 'Debug'
@@ -129,6 +130,11 @@ def get_cmake_args():
             build_options.extend(['-G', 'Visual Studio 17 2022'])
         else:
             build_options.extend(['-G', 'Ninja', '--skip-generator-test'])
+    if sys.platform == "darwin":
+        if (os.getenv('TAICHI_USE_XCODE', '0') in ('1', 'ON')):
+            use_xcode = True
+        if use_xcode:
+            build_options.extend(['-G', 'Xcode', '--skip-generator-test'])
     sys.argv[2:2] = build_options
 
     cmake_args += [
@@ -137,7 +143,9 @@ def get_cmake_args():
         f'-DTI_VERSION_PATCH={TI_VERSION_PATCH}',
     ]
 
-    if sys.platform != 'win32':
+    if sys.platform == "darwin" and use_xcode:
+        os.environ['SKBUILD_BUILD_OPTIONS'] = f'-jobs {num_threads}'
+    elif sys.platform != 'win32':
         os.environ['SKBUILD_BUILD_OPTIONS'] = f'-j{num_threads}'
     elif use_msbuild:
         # /M uses multi-threaded build (similar to -j)