reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/lunn/linux/commit/e8a03ab091c87d818bdaa61873dfd96c6f6df5da
        git remote add lunn https://github.com/lunn/linux.git
        git fetch --no-tags lunn v6.12.0-scu4-dt-overlay
        git checkout e8a03ab091c87d818bdaa61873dfd96c6f6df5da
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash lib/