tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 887a333c44eb67973622e530e43cd5e4cf9af927 commit: 05a5ff1e0c9581e4ceb8cdc2cbcce5ed0e9fa2b7 [2792/2969] lib/test_string.c: Add test for strlen() config: mips-randconfig-r025-20220130 (https://download.01.org/0day-ci/archive/20220201/202202011846.EbcxQdke-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6b1e844b69f15bb7dffaf9365cd2b355d2eb7579) 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 # install mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=05a5ff1e0c9581e4ceb8cdc2cbcce5ed0e9fa2b7 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 05a5ff1e0c9581e4ceb8cdc2cbcce5ed0e9fa2b7 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash lib/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> lib/test_string.c:188:30: error: initializer element is not a compile-time constant static const int strlen_ce = strlen("tada, a constant expression"); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. vim +188 lib/test_string.c 181 182 /* 183 * Unlike many other string functions, strlen() can be used in 184 * static initializers when string lengths are known at compile 185 * time. (i.e. Under these conditions, strlen() is a constant 186 * expression.) Make sure it can be used this way. 187 */ > 188 static const int strlen_ce = strlen("tada, a constant expression"); 189 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx