Hi Alastair, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Alastair-Robertson/libbpf-Extend-linker-API-to-support-in-memory-ELF-files/20241121-152231 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20241120170206.2592931-1-ajor%40meta.com patch subject: [PATCH bpf-next] libbpf: Extend linker API to support in-memory ELF files config: i386-buildonly-randconfig-001-20241122 (https://download.01.org/0day-ci/archive/20241122/202411221039.4cgeHanS-lkp@xxxxxxxxx/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241122/202411221039.4cgeHanS-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202411221039.4cgeHanS-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> linker.c:2733:5: error: no previous prototype for function 'linker_finalize_common' [-Werror,-Wmissing-prototypes] 2733 | int linker_finalize_common(struct bpf_linker *linker) | ^ linker.c:2733:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2733 | int linker_finalize_common(struct bpf_linker *linker) | ^ | static 1 error generated. make[6]: *** [tools/build/Makefile.build:105: tools/bpf/resolve_btfids/libbpf/staticobjs/linker.o] Error 1 make[6]: *** Waiting for unfinished jobs.... make[5]: *** [Makefile:165: tools/bpf/resolve_btfids/libbpf/staticobjs/libbpf-in.o] Error 2 make[4]: *** [Makefile:63: tools/bpf/resolve_btfids//libbpf/libbpf.a] Error 2 make[3]: *** [Makefile:76: bpf/resolve_btfids] Error 2 shuffle=3701184676 make[2]: *** [Makefile:1370: tools/bpf/resolve_btfids] Error 2 shuffle=3701184676 In file included from arch/x86/kernel/asm-offsets.c:14: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:21: In file included from include/linux/mm.h:2213: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ 1 warning generated. make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:224: __sub-make] Error 2 shuffle=3701184676 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:224: __sub-make] Error 2 shuffle=3701184676 make: Target 'prepare' not remade because of errors. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki