reproduce (this is a W=1 build):
        # https://github.com/robertosassu/linux/commit/9a18812bbd152e161681fe65e9414e05c5aa3480
        git remote add robertosassu https://github.com/robertosassu/linux
        git fetch --no-tags robertosassu measure-error-v1-devel-v2
        git checkout 9a18812bbd152e161681fe65e9414e05c5aa3480

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/