tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   764a5bc89b12b82c18ce7ca5d7c1b10dd748a440
commit: cf536e185869d4815d506e777bcca6edd9966a6e Makefile: extend 32B aligned debug option to 64B aligned
date:   10 weeks ago
config: powerpc64-randconfig-c023-20210730 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 10.3.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cf536e185869d4815d506e777bcca6edd9966a6e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout cf536e185869d4815d506e777bcca6edd9966a6e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=powerpc64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> make[2]: *** [arch/powerpc/Makefile.postlink:31: vmlinux] Error 1

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org