reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://github.com/steev/linux/commit/983c9e9eb9686ca3f28ad71a52dc1f3d1444ecae
        git remote add steev https://github.com/steev/linux
        git fetch --no-tags steev c630-linux-6.7.y
        git checkout 983c9e9eb9686ca3f28ad71a52dc1f3d1444ecae
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/soc/qcom/