**问题描述**

Apple M4 Pro Arm64 (macOS Sequoia 15.5)上编译 llvm 失败

**复现步骤**

- 在Apple M4 Pro Arm64 (macOS Sequoia 15.5)上，按照[官方构建说明](https://gitee.com/openharmony/third_party_llvm-project/blob/master/llvm-build/README.md)操作即可复现，具体如下

```

mkdir ohm-llvm-master

repo init -u https://gitee.com/OpenHarmony/manifest.git -b master -m llvm-toolchain.xml

repo sync -c

repo forall -c 'git lfs pull'

./toolchain/llvm-project/llvm-build/env_prepare.sh

python3 ./toolchain/llvm-project/llvm-build/build.py

```

- 失败一

不存在 prebuilts/cmake/darwin-x86，具体错误 log 如下

```

x COPYING

x README.OpenSource

x ninja

mv: rename /Users/tangwei/workspace/ohm-llvm-master/prebuilts/cmake/darwin-x86 to /Users/tangwei/workspace/ohm-llvm-master/prebuilts/cmake/darwin-arm64: No such file or directory

```

查看 prebuilts/cmake 文件夹，内容为 darwin-universal

```

cd prebuilts/cmake

ls

|-----darwin-universal

```

手动将 prebuilts/cmake/darwin-universal 修改为 prebuilts/cmake/darwin-x86 可跳过该错误

- 失败二

toolchain/llvm-project/lldb/bindings/interfaces.swig:5 重复定义的宏 __STDC_LIMIT_MACROS。手动添加 #ifndef 后可跳过该错误

```

FAILED: tools/lldb/bindings/python/LLDBWrapPython.cpp tools/lldb/bindings/python/lldb.py /Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/bindings/python/LLDBWrapPython.cpp /Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/bindings/python/lldb.py

cd /Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/bindings/python && /opt/homebrew/bin/swig -c++ -features autodoc -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/include -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/bindings -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__APPLE__ -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/bindings/python -c++ -shadow -python -py3 -threads -outdir /Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/bindings/python -o /Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/bindings/python/LLDBWrapPython.cpp /Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/bindings/python/python.swig

Deprecated command line option: -py3. Ignored, this option is no longer supported.

/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/bindings/interfaces.swig:5: Error: Macro '__STDC_LIMIT_MACROS' redefined,

:EOF: Error: previous definition of '__STDC_LIMIT_MACROS'.

[1116/2571] Building CXX object tools/clang/tools/libclang/CMa

```

- 失败三

Host.mm/HostInfoMacOSX.mm/HostThreadMacOSX.mm 无法识别符号 NSUInteger、NSString 等

```

[87/1456] Building CXX object tools/lldb/source/Host/mac...MakeFiles/lldbHostMacOSXObjCXX.dir/HostThreadMacOSX.mm.o

FAILED: tools/lldb/source/Host/macosx/objcxx/CMakeFiles/lldbHostMacOSXObjCXX.dir/HostThreadMacOSX.mm.o

/Users/tangwei/workspace/ohm-llvm-master/prebuilts/clang/ohos/darwin-arm64/clang-15.0.4/bin/clang++ -DGTEST_HAS_RTTI=0 -DHAVE_ROUND -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/source/Host/macosx/objcxx -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/source/Host/macosx/objcxx -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/include -I/Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/include -I/Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/include -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/llvm/include -I/Users/tangwei/workspace/ohm-llvm-master/prebuilts/python3/darwin-arm64/3.11.4/include/python3.11 -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/llvm/../clang/include -I/Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/../clang/include -I/opt/homebrew/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/libxml2 -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/source -I/Users/tangwei/workspace/ohm-llvm-master/out/llvm_make/tools/lldb/source -I/Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/source/Host/macosx/objcxx/.. -fstack-protector-strong -stdlib=libc++ -stdlib=libc++ -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion -Wmisleading-indentation -fdiagnostics-color -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-strict-aliasing -Wno-deprecated-register -Wno-vla-extension -O3 -DNDEBUG -std=c++14 -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -mmacosx-version-min=10.9 -fPIC -fno-exceptions -fno-rtti -fno-objc-exceptions -MD -MT tools/lldb/source/Host/macosx/objcxx/CMakeFiles/lldbHostMacOSXObjCXX.dir/HostThreadMacOSX.mm.o -MF tools/lldb/source/Host/macosx/objcxx/CMakeFiles/lldbHostMacOSXObjCXX.dir/HostThreadMacOSX.mm.o.d -o tools/lldb/source/Host/macosx/objcxx/CMakeFiles/lldbHostMacOSXObjCXX.dir/HostThreadMacOSX.mm.o -c /Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/source/Host/macosx/objcxx/HostThreadMacOSX.mm

In file included from /Users/tangwei/workspace/ohm-llvm-master/toolchain/llvm-project/lldb/source/Host/macosx/objcxx/HostThreadMacOSX.mm:11:

In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:9:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:626:74: error: unknown type name 'NSUInteger'

FOUNDATION_EXPORT const char *NSGetSizeAndAlignment(const char *typePtr, NSUInteger * _Nullable sizep, NSUInteger * _Nullable alignp);

```

代码下载：

diff文件：

编译命令：

执行测试步骤：

报错信息：

已分析的结论