reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/lunn/linux/commit/3248e132ab2e635e3cb715ec9ff5b5bbcc5f3177
        git remote add lunn https://github.com/lunn/linux.git
        git fetch --no-tags lunn v6.7-rc6-net-next-mv88e6xxx-leds-v3
        git checkout 3248e132ab2e635e3cb715ec9ff5b5bbcc5f3177
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash