[Build] MacOS universal binary build failure: "error: unknown target CPU 'armv8-a'"

[edgchen1]

Describe the issue

Building a MacOS universal binary (i.e., with CMAKE_OSX_ARCHITECTURES=arm64;x86_64) fails. The build machine is an Intel Mac on MacOS 15.3 with Xcode 16.0. See the build script and error output for details.

Urgency

No response

Target platform

MacOS

Build script

% ./build.sh --build_dir ./build/test_universal2 --cmake_extra_defines 'CMAKE_OSX_ARCHITECTURES=arm64;x86_64' 'CMAKE_VERBOSE_MAKEFILE=ON' --build_shared_lib --config Release --update --build --target onnxruntime_mlas

Error / output

[  0%] Building C object _deps/kleidiai-build/CMakeFiles/kleidiai.dir/kai/ukernels/matmul/pack/kai_lhs_quant_pack_qai8dxp_f32.c.o
cd /Users/edch2/source/onnxruntime/build/test_universal2/Release/_deps/kleidiai-build && /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -DEIGEN_MPL2_ONLY -I/Users/edch2/source/onnxruntime/include/onnxruntime -I/Users/edch2/source/onnxruntime/include/onnxruntime/core/session -I/Users/edch2/source/onnxruntime/build/test_universal2/Release/_deps/kleidiai-src -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c99 -arch arm64 -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.0.sdk -fPIC -Wpedantic -Wall -Wdisabled-optimization -Wextra -Wformat-security -Wformat=2 -Winit-self -Wstrict-overflow=2 -Wswitch-default -Wcast-qual -Wmissing-prototypes -Wstrict-prototypes -march=armv8-a -MD -MT _deps/kleidiai-build/CMakeFiles/kleidiai.dir/kai/ukernels/matmul/pack/kai_lhs_quant_pack_qai8dxp_f32.c.o -MF CMakeFiles/kleidiai.dir/kai/ukernels/matmul/pack/kai_lhs_quant_pack_qai8dxp_f32.c.o.d -o CMakeFiles/kleidiai.dir/kai/ukernels/matmul/pack/kai_lhs_quant_pack_qai8dxp_f32.c.o -c /Users/edch2/source/onnxruntime/build/test_universal2/Release/_deps/kleidiai-src/kai/ukernels/matmul/pack/kai_lhs_quant_pack_qai8dxp_f32.c
error: unknown target CPU 'armv8-a'
note: valid target CPU values are: nocona, core2, penryn, bonnell, atom, silvermont, slm, goldmont, goldmont-plus, tremont, nehalem, corei7, westmere, sandybridge, corei7-avx, ivybridge, core-avx-i, haswell, core-avx2, broadwell, skylake, skylake-avx512, skx, cascadelake, cooperlake, cannonlake, icelake-client, rocketlake, icelake-server, tigerlake, sapphirerapids, alderlake, raptorlake, meteorlake, sierraforest, grandridge, graniterapids, graniterapids-d, emeraldrapids, knl, knm, k8, athlon64, athlon-fx, opteron, k8-sse3, athlon64-sse3, opteron-sse3, amdfam10, barcelona, btver1, btver2, bdver1, bdver2, bdver3, bdver4, znver1, znver2, znver3, znver4, x86-64, x86-64-v2, x86-64-v3, x86-64-v4
make[3]: *** [_deps/kleidiai-build/CMakeFiles/kleidiai.dir/kai/ukernels/matmul/pack/kai_lhs_quant_pack_qai8dxp_f32.c.o] Error 1
make[2]: *** [_deps/kleidiai-build/CMakeFiles/kleidiai.dir/all] Error 2
make[1]: *** [CMakeFiles/onnxruntime_mlas.dir/rule] Error 2
make: *** [onnxruntime_mlas] Error 2

Visual Studio Version

No response

GCC / Compiler Version

Xcode 16 / Apple clang version 16.0.0 (clang-1600.0.26.3)

[github-actions]

This issue has been automatically marked as stale due to inactivity and will be closed in 30 days if no further activity occurs. If further support is needed, please provide an update and/or more details.

[snnn]

This issue has been automatically closed because it has been marked as 'stale' for more than 30 days without activity. If you believe this is still an issue, please feel free to reopen it.