triplets: Explicit set VCPKG_OSX_SYSROOT for macOS triplets

[ADKaster]

Starting with CMake 4.x, CMake intentionally no longer chooses any SDK or passes an -isysroot flag to the compiler by default. CMake now expects that a compiler will have default detection for the SDK itself.

However, upstream llvm does not actually do this, only Apple Clang does. To support homebrew clang and manually compiled clang from llvm/llvm-project, explicitly set VCPKG_OSX_SYSROOT in each macOS triplet file.

---

The port build failure (but not question) in #45148 is resolved with this PR.

n.b.:

llvm/llvm-project#135459 (comment)
https://gitlab.kitware.com/cmake/cmake/-/issues/26863
https://cmake.org/cmake/help/latest/release/4.0.html#other-changes

Related to:

#44273

[BillyONeal]

However, upstream llvm does not actually do this, only Apple Clang does. To support homebrew clang and manually compiled clang from llvm/llvm-project, explicitly set VCPKG_OSX_SYSROOT in each macOS triplet file.

It seems like that is something that should be in triplets expecting to use those compilers rather than our bundled ones, which expect to use the platform's default compiler (Apple Clang in this case)

[BillyONeal]

[1/2] "/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" -E chdir ".." "/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" "/Users/vcpkg/Data/b/godot-cpp/src/4.4-stable-8421839c48.clean" "-G" "Ninja" "-DCMAKE_BUILD_TYPE=Release" "-DCMAKE_INSTALL_PREFIX=/Users/vcpkg/Data/p/godot-cpp_arm64-osx" "-DFETCHCONTENT_FULLY_DISCONNECTED=ON" "-DPython3_EXECUTABLE=/opt/homebrew/bin/python3" "-DCMAKE_MAKE_PROGRAM=/opt/homebrew/bin/ninja" "-DCMAKE_SYSTEM_NAME=Darwin" "-DBUILD_SHARED_LIBS=OFF" "-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/toolchains/osx.cmake" "-DVCPKG_TARGET_TRIPLET=arm64-osx" "-DVCPKG_SET_CHARSET_FLAG=ON" "-DVCPKG_PLATFORM_TOOLSET=external" "-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=ON" "-DCMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP=TRUE" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DVCPKG_APPLOCAL_DEPS=OFF" "-DCMAKE_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/buildsystems/vcpkg.cmake" "-DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=ON" "-DVCPKG_CXX_FLAGS=" "-DVCPKG_CXX_FLAGS_RELEASE=" "-DVCPKG_CXX_FLAGS_DEBUG=" "-DVCPKG_C_FLAGS=" "-DVCPKG_C_FLAGS_RELEASE=" "-DVCPKG_C_FLAGS_DEBUG=" "-DVCPKG_CRT_LINKAGE=dynamic" "-DVCPKG_LINKER_FLAGS=" "-DVCPKG_LINKER_FLAGS_RELEASE=" "-DVCPKG_LINKER_FLAGS_DEBUG=" "-DVCPKG_TARGET_ARCHITECTURE=arm64" "-DCMAKE_INSTALL_LIBDIR:STRING=lib" "-DCMAKE_INSTALL_BINDIR:STRING=bin" "-D_VCPKG_ROOT_DIR=/Users/vcpkg/Data/work/2/s" "-D_VCPKG_INSTALLED_DIR=/Users/vcpkg/Data/installed" "-DVCPKG_MANIFEST_INSTALL=OFF" "-DCMAKE_OSX_SYSROOT=macosx" "-DCMAKE_OSX_ARCHITECTURES=arm64"
FAILED: ../CMakeCache.txt 
"/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" -E chdir ".." "/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" "/Users/vcpkg/Data/b/godot-cpp/src/4.4-stable-8421839c48.clean" "-G" "Ninja" "-DCMAKE_BUILD_TYPE=Release" "-DCMAKE_INSTALL_PREFIX=/Users/vcpkg/Data/p/godot-cpp_arm64-osx" "-DFETCHCONTENT_FULLY_DISCONNECTED=ON" "-DPython3_EXECUTABLE=/opt/homebrew/bin/python3" "-DCMAKE_MAKE_PROGRAM=/opt/homebrew/bin/ninja" "-DCMAKE_SYSTEM_NAME=Darwin" "-DBUILD_SHARED_LIBS=OFF" "-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/toolchains/osx.cmake" "-DVCPKG_TARGET_TRIPLET=arm64-osx" "-DVCPKG_SET_CHARSET_FLAG=ON" "-DVCPKG_PLATFORM_TOOLSET=external" "-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=ON" "-DCMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP=TRUE" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DVCPKG_APPLOCAL_DEPS=OFF" "-DCMAKE_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/buildsystems/vcpkg.cmake" "-DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=ON" "-DVCPKG_CXX_FLAGS=" "-DVCPKG_CXX_FLAGS_RELEASE=" "-DVCPKG_CXX_FLAGS_DEBUG=" "-DVCPKG_C_FLAGS=" "-DVCPKG_C_FLAGS_RELEASE=" "-DVCPKG_C_FLAGS_DEBUG=" "-DVCPKG_CRT_LINKAGE=dynamic" "-DVCPKG_LINKER_FLAGS=" "-DVCPKG_LINKER_FLAGS_RELEASE=" "-DVCPKG_LINKER_FLAGS_DEBUG=" "-DVCPKG_TARGET_ARCHITECTURE=arm64" "-DCMAKE_INSTALL_LIBDIR:STRING=lib" "-DCMAKE_INSTALL_BINDIR:STRING=bin" "-D_VCPKG_ROOT_DIR=/Users/vcpkg/Data/work/2/s" "-D_VCPKG_INSTALLED_DIR=/Users/vcpkg/Data/installed" "-DVCPKG_MANIFEST_INSTALL=OFF" "-DCMAKE_OSX_SYSROOT=macosx" "-DCMAKE_OSX_ARCHITECTURES=arm64"
CMake Error at cmake/macos.cmake:17 (find_library):
  Could not find COCOA_LIBRARY using the following names: Cocoa
Call Stack (most recent call first):
  cmake/godotcpp.cmake:31 (include)
  CMakeLists.txt:40 (include)


-- Configuring incomplete, errors occurred!
[2/2] "/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" -E chdir "../../arm64-osx-dbg" "/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" "/Users/vcpkg/Data/b/godot-cpp/src/4.4-stable-8421839c48.clean" "-G" "Ninja" "-DCMAKE_BUILD_TYPE=Debug" "-DCMAKE_INSTALL_PREFIX=/Users/vcpkg/Data/p/godot-cpp_arm64-osx/debug" "-DFETCHCONTENT_FULLY_DISCONNECTED=ON" "-DPython3_EXECUTABLE=/opt/homebrew/bin/python3" "-DCMAKE_MAKE_PROGRAM=/opt/homebrew/bin/ninja" "-DCMAKE_SYSTEM_NAME=Darwin" "-DBUILD_SHARED_LIBS=OFF" "-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/toolchains/osx.cmake" "-DVCPKG_TARGET_TRIPLET=arm64-osx" "-DVCPKG_SET_CHARSET_FLAG=ON" "-DVCPKG_PLATFORM_TOOLSET=external" "-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=ON" "-DCMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP=TRUE" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DVCPKG_APPLOCAL_DEPS=OFF" "-DCMAKE_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/buildsystems/vcpkg.cmake" "-DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=ON" "-DVCPKG_CXX_FLAGS=" "-DVCPKG_CXX_FLAGS_RELEASE=" "-DVCPKG_CXX_FLAGS_DEBUG=" "-DVCPKG_C_FLAGS=" "-DVCPKG_C_FLAGS_RELEASE=" "-DVCPKG_C_FLAGS_DEBUG=" "-DVCPKG_CRT_LINKAGE=dynamic" "-DVCPKG_LINKER_FLAGS=" "-DVCPKG_LINKER_FLAGS_RELEASE=" "-DVCPKG_LINKER_FLAGS_DEBUG=" "-DVCPKG_TARGET_ARCHITECTURE=arm64" "-DCMAKE_INSTALL_LIBDIR:STRING=lib" "-DCMAKE_INSTALL_BINDIR:STRING=bin" "-D_VCPKG_ROOT_DIR=/Users/vcpkg/Data/work/2/s" "-D_VCPKG_INSTALLED_DIR=/Users/vcpkg/Data/installed" "-DVCPKG_MANIFEST_INSTALL=OFF" "-DCMAKE_OSX_SYSROOT=macosx" "-DCMAKE_OSX_ARCHITECTURES=arm64"
FAILED: ../../arm64-osx-dbg/CMakeCache.txt 
"/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" -E chdir "../../arm64-osx-dbg" "/Users/vcpkg/Data/downloads/tools/cmake-3.30.1-osx/cmake-3.30.1-macos-universal/CMake.app/Contents/bin/cmake" "/Users/vcpkg/Data/b/godot-cpp/src/4.4-stable-8421839c48.clean" "-G" "Ninja" "-DCMAKE_BUILD_TYPE=Debug" "-DCMAKE_INSTALL_PREFIX=/Users/vcpkg/Data/p/godot-cpp_arm64-osx/debug" "-DFETCHCONTENT_FULLY_DISCONNECTED=ON" "-DPython3_EXECUTABLE=/opt/homebrew/bin/python3" "-DCMAKE_MAKE_PROGRAM=/opt/homebrew/bin/ninja" "-DCMAKE_SYSTEM_NAME=Darwin" "-DBUILD_SHARED_LIBS=OFF" "-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/toolchains/osx.cmake" "-DVCPKG_TARGET_TRIPLET=arm64-osx" "-DVCPKG_SET_CHARSET_FLAG=ON" "-DVCPKG_PLATFORM_TOOLSET=external" "-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=ON" "-DCMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP=TRUE" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DVCPKG_APPLOCAL_DEPS=OFF" "-DCMAKE_TOOLCHAIN_FILE=/Users/vcpkg/Data/work/2/s/scripts/buildsystems/vcpkg.cmake" "-DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=ON" "-DVCPKG_CXX_FLAGS=" "-DVCPKG_CXX_FLAGS_RELEASE=" "-DVCPKG_CXX_FLAGS_DEBUG=" "-DVCPKG_C_FLAGS=" "-DVCPKG_C_FLAGS_RELEASE=" "-DVCPKG_C_FLAGS_DEBUG=" "-DVCPKG_CRT_LINKAGE=dynamic" "-DVCPKG_LINKER_FLAGS=" "-DVCPKG_LINKER_FLAGS_RELEASE=" "-DVCPKG_LINKER_FLAGS_DEBUG=" "-DVCPKG_TARGET_ARCHITECTURE=arm64" "-DCMAKE_INSTALL_LIBDIR:STRING=lib" "-DCMAKE_INSTALL_BINDIR:STRING=bin" "-D_VCPKG_ROOT_DIR=/Users/vcpkg/Data/work/2/s" "-D_VCPKG_INSTALLED_DIR=/Users/vcpkg/Data/installed" "-DVCPKG_MANIFEST_INSTALL=OFF" "-DCMAKE_OSX_SYSROOT=macosx" "-DCMAKE_OSX_ARCHITECTURES=arm64"
CMake Error at cmake/macos.cmake:17 (find_library):
  Could not find COCOA_LIBRARY using the following names: Cocoa
Call Stack (most recent call first):
  cmake/godotcpp.cmake:31 (include)
  CMakeLists.txt:40 (include)


-- Configuring incomplete, errors occurred!
ninja: build stopped: subcommand failed.

[ADKaster]

This PR is OBE due to a patch that will be included in CMake 4.0.2

https://gitlab.kitware.com/cmake/cmake/-/merge_requests/10734