tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ba816d3c265cfe9ed0ee8347eab63cf5ac3cf5dc
commit: 166405f6b53b7d7eecb7939aa4a79bc7c1e0ed68 xfs: stop CONFIG_XFS_DEBUG from changing compiler flags
date:   1 year, 1 month ago
config: powerpc-randconfig-r016-20210521 (attached as .config)
compiler: powerpc64-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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=166405f6b53b7d7eecb7939aa4a79bc7c1e0ed68
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 166405f6b53b7d7eecb7939aa4a79bc7c1e0ed68
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 

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