[Build] "error: package directory 'onnxruntime/backend' does not exist" on MacOS/arm64

[bluejack]

Describe the issue

Using the documentation here:

https://onnxruntime.ai/docs/build/inferencing.html

I want to build a python wheel with custom code.

I run the macos build process without problem; all tests succeed.

I install protobufs, as directed.

I execute:

export ONNX_ML=1
python3 setup.py bdist_wheel

And then it fails with:

error: package directory 'onnxruntime/backend' does not exist

Which it does not.

That directory structure:

ReformatSource.ps1         lora
ReformatSourcePython.bat   python
VSCodeCoverage.runsettings test
__init__.py                tool
contrib_ops                wasm
core

Urgency

No response

Target platform

MacOs ARM

Build script

./build.sh --config RelWithDebInfo --build_shared_lib --parallel --compile_no_warning_as_error --skip_submodule_sync --cmake_extra_defines CMAKE_OSX_ARCHITECTURES=arm64

Followed by:

export ONNX_ML=1
python3 setup.py bdist_wheel

Error / output

running bdist_wheel
running build
running build_py
copying onnxruntime/__init__.py -> build/lib/onnxruntime
error: package directory 'onnxruntime/backend' does not exist

Visual Studio Version

No response

GCC / Compiler Version

Apple clang version 15.0.0 (clang-1500.3.9.4) Target: arm64-apple-darwin23.6.0 Thread model: posix InstalledDir: /Library/Developer/CommandLineTools/usr/bin

[bluejack]

I am trying a similar build on linux to see if the problem is me being stupid or osmething about the macos build process.

[skottmckay]

--build_wheel will build the wheel. It will be in the dist directory under the build output directory.

I'd also suggest using --arm64 instead of doing that via CMAKE_OSX_ARCHITECTURES.