CC: linux-kernel(a)vger.kernel.org TO: Alexei Starovoitov <ast(a)kernel.org&gt; CC: Daniel Borkmann <daniel(a)iogearbox.net&gt; Hi Alexei, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 6f513529296fd4f696afb4354c46508abe646541 commit: d71fa5c9763c24dd997a2fa4feb7a13a95bab42c bpf: Add kernel module with user mode driver that populates bpffs. date: 1 year, 4 months ago config: i386-randconfig-a016-20211210 (https://download.01.org/0day-ci/archive/20211212/202112120221.40vnlfzg-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d71fa5c9763c24dd997a2fa4feb7a13a95bab42c # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libelf.so when searching for -lelf /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libelf.a when searching for -lelf /usr/bin/ld: cannot find -lelf /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libelf.so when searching for -lelf /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libz.so when searching for -lz /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libz.a when searching for -lz /usr/bin/ld: cannot find -lz /usr/bin/ld: skipping incompatible /usr/lib/x86_64-linux-gnu/libz.so when searching for -lz --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org