reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git/commit/?id=82441c3e6330f32129f7b78c031ef1a199ab2036
        git remote add gerg-m68knommu https://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git
        git fetch --no-tags gerg-m68knommu dt
        git checkout 82441c3e6330f32129f7b78c031ef1a199ab2036
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash