reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/esmil/linux/commit/a66c0350f140f50f26d79d84ff42c898f36e8bc9
        git remote add esmil https://github.com/esmil/linux
        git fetch --no-tags esmil d1-6.11.y
        git checkout a66c0350f140f50f26d79d84ff42c898f36e8bc9
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash sound/soc/sunxi/