Build Failure When Enabling KleidiAI on ARMv9 in llama-cpp-python ≥ 3.10.0

[ZIFENG278]

When I try to install the latest version of llama-cpp-python and enable KleidiAI on an ARMv9 CPU, I use the following command:

CMAKE_ARGS="-DGGML_NATIVE=OFF -DGGML_CPU_ARM_ARCH=armv9-a+i8mm+dotprod -DGGML_CPU_KLEIDIAI=ON" pip3 install llama-cpp-python

However, during the wheel-building process, it fails with the following error:

      [93/94] : && /usr/bin/cmake -E rm -f vendor/llama.cpp/common/libcommon.a && /usr/bin/aarch64-linux-gnu-ar qc vendor/llama.cpp/common/libcommon.a  vendor/llama.cpp/common/CMakeFiles/build_info.dir/build-info.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/arg.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/chat-parser.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/chat.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/common.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/console.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/json-partial.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/json-schema-to-grammar.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/llguidance.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/log.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/ngram-cache.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/regex-partial.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/sampling.cpp.o vendor/llama.cpp/common/CMakeFiles/common.dir/speculative.cpp.o && /usr/bin/aarch64-linux-gnu-ranlib vendor/llama.cpp/common/libcommon.a && :
      [94/94] : && /usr/bin/aarch64-linux-gnu-g++ -O3 -DNDEBUG  vendor/llama.cpp/tools/mtmd/CMakeFiles/llama-mtmd-cli.dir/mtmd-cli.cpp.o -o vendor/llama.cpp/tools/mtmd/llama-mtmd-cli  -Wl,-rpath,/tmp/tmpuri70waa/build/vendor/llama.cpp/tools/mtmd:/tmp/tmpuri70waa/build/bin:  vendor/llama.cpp/common/libcommon.a  vendor/llama.cpp/tools/mtmd/libmtmd.so  bin/libllama.so  bin/libggml.so  bin/libggml-cpu.so  bin/libggml-base.so && :
      *** Installing project into wheel...
      -- Install configuration: "Release"
      -- Installing: /tmp/tmpuri70waa/wheel/platlib/lib/libggml-cpu.so
      CMake Error at /tmp/tmpuri70waa/build/_deps/kleidiai_download-build/cmake_install.cmake:52 (file):
        file INSTALL cannot find "/tmp/tmpuri70waa/build/bin/libkleidiai.so": No
        such file or directory.
      Call Stack (most recent call first):
        /tmp/tmpuri70waa/build/vendor/llama.cpp/ggml/src/cmake_install.cmake:65 (include)
        /tmp/tmpuri70waa/build/vendor/llama.cpp/ggml/cmake_install.cmake:47 (include)
        /tmp/tmpuri70waa/build/vendor/llama.cpp/cmake_install.cmake:47 (include)
        /tmp/tmpuri70waa/build/cmake_install.cmake:47 (include)
      
      
      
      *** CMake install failed
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for llama-cpp-python
Failed to build llama-cpp-python
error: failed-wheel-build-for-install

× Failed to build installable wheels for some pyproject.toml based projects
╰─> llama-cpp-python

These CMake flags (-DGGML_NATIVE=OFF -DGGML_CPU_ARM_ARCH=armv9-a+i8mm+dotprod -DGGML_CPU_KLEIDIAI=ON) have already been tested on llama.cpp, and the build succeeds there.

The installation works for llama-cpp-python==3.9.0, but starting from 3.10.0, the build fails with the error above.