reproduce (this is a W=1 build):
        # https://github.com/cschaufler/smack-next/commit/ecd4785c2969ce0994fd9752ceeade2181b8ef34
        git remote add cschaufler-smack-next https://github.com/cschaufler/smack-next
        git fetch --no-tags cschaufler-smack-next pr/2
        git checkout ecd4785c2969ce0994fd9752ceeade2181b8ef34

        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=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash