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/pcmoore/selinux.git/commit/?id=5d7ddc59b3d89b724a5aa8f30d0db94ff8d2d93f
        git remote add pcmoore-selinux https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git
        git fetch --no-tags pcmoore-selinux next
        git checkout 5d7ddc59b3d89b724a5aa8f30d0db94ff8d2d93f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash security/selinux/