slfan1989 opened a new issue, #961:
URL: https://github.com/apache/hudi-rs/issues/961
### Is there an existing issue for this?
- [x] I have searched the existing issues
### Description of the bug
The C++ file-group example fails to link on macOS arm64, even after the Rust
hudi-cpp library builds successfully.
The linker reports undefined references to the destructor, type information
and vtable of rust::cxxbridge1::Error.
The example compiles the generated CXX bridge source, but does not link the
matching cxx C++ runtime. The failure occurs during linking, before any table
reads or cloud access.
### Steps To Reproduce
```bash
export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX26.5.sdk
./build-wrapper.sh cargo build -p hudi-cpp
cmake -S demo/apps/hudi-file-group-api/cpp \
-B target/cpp-example-repro \
-DCMAKE_BUILD_TYPE=Debug \
-DCMAKE_OSX_SYSROOT="$SDKROOT" \
-DCMAKE_OSX_DEPLOYMENT_TARGET=14.0
cmake --build target/cpp-example-repro --parallel 2
```
The final command fails while linking `file_group_api_cpp`
### Expected behavior
The C++ example should compile and link successfully using the provided
CMake configuration, including the CXX bridge and its matching C++ runtime.
### Screenshots / Logs
```
[100%] Linking CXX executable file_group_api_cpp
Undefined symbols for architecture arm64:
"rust::cxxbridge1::Error::~Error()", referenced from: ...
"typeinfo for rust::cxxbridge1::Error", referenced from: ...
"vtable for rust::cxxbridge1::Error", referenced from: ...
ld: symbol(s) not found for architecture arm64
c++: error: linker command failed with exit code 1
```
### Software information
- Operating system: macOS 26.6.2, arm64
- Rust version: rustc 1.94.1
- Project version: 0.6.0-dev
- CMake version: 3.31.6
- C++ compiler: AppleClang 21.0.0
- macOS SDK used for reproduction: 26.5
- Build type: Debug
### Additional context
I have prepared a local fix that resolves hudi-cpp's actual cxx dependency
through Cargo metadata and compiles its C++ runtime alongside the generated
bridge.
With this change, the example links successfully.
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