tree: https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git lto-5.7-1 head: 474a075723f2ac6be829a1bf294f25ac656e8a07 commit: 1019fa5b482944935bbc749f0d08be714441687b [26/54] kconfig: Report better errors config: i386-randconfig-a016-20200712 compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 reproduce (this is a W=1 build): git checkout 1019fa5b482944935bbc749f0d08be714441687b make W=1 ARCH=i386 randconfig make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the ak/lto-5.7-1 HEAD 474a075723f2ac6be829a1bf294f25ac656e8a07 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): /usr/share/bison/skeletons/bison.m4:1026: the top level %define parse.error detailed ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ scripts/kconfig/parser.y:5.1-28: accepted value: 'simple' scripts/kconfig/parser.y:5.1-28: accepted value: 'verbose' make[2]: *** [scripts/Makefile.host:17: scripts/kconfig/parser.tab.h] Error 1 make[2]: Target 'oldconfig' not remade because of errors. make[1]: *** [Makefile:589: oldconfig] Error 2 make: *** [Makefile:180: sub-make] Error 2 make: Target 'oldconfig' not remade because of errors. -- /usr/share/bison/skeletons/bison.m4:1026: the top level %define parse.error detailed ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ scripts/kconfig/parser.y:5.1-28: accepted value: 'simple' scripts/kconfig/parser.y:5.1-28: accepted value: 'verbose' make[2]: *** [scripts/Makefile.host:17: scripts/kconfig/parser.tab.h] Error 1 make[2]: Target 'olddefconfig' not remade because of errors. make[1]: *** [Makefile:589: olddefconfig] Error 2 make: *** [Makefile:180: sub-make] Error 2 make: Target 'olddefconfig' not remade because of errors. vim +5 scripts/kconfig/parser.y 6 %{ 7 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org