tree: https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git chromeos-4.19__release/core54-58 head: 208dd46b3c22c99d62d37dcf4f278de674e2d24b commit: 7ac70ff8e2674d6df73c292aeeea7ba102084d16 [9612/9999] MIPS: Truncate link address into 32bit for 32bit kernel config: mips-randconfig-r033-20200707 (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 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 git checkout 7ac70ff8e2674d6df73c292aeeea7ba102084d16 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 >>): mips-linux-ld: arch/mips/boot/compressed/decompress.o: in function `LZ4_decompress_safe_continue': arch/mips/boot/compressed/decompress.c:(.text+0xe18): undefined reference to `memmove' mips-linux-ld: arch/mips/boot/compressed/decompress.o: in function `LZ4_decompress_fast_continue': arch/mips/boot/compressed/decompress.c:(.text+0x1584): undefined reference to `memmove' mips-linux-ld: arch/mips/boot/compressed/decompress.c:(.text+0x193c): undefined reference to `memmove' mips-linux-ld: arch/mips/boot/compressed/decompress.o: in function `LZ4_decompress_safe_usingDict': arch/mips/boot/compressed/decompress.c:(.text+0x1da8): undefined reference to `memmove' mips-linux-ld: arch/mips/boot/compressed/decompress.o:arch/mips/boot/compressed/decompress.c:(.text+0x2b38): more undefined references to `memmove' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org