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SubjectERROR: modpost: "__aeabi_unwind_cpp_pr0" undefined!
Hi Nathan,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 1048ba83fb1c00cd24172e23e8263972f6b5d9ac
commit: c39866f268f89868df17724cd2262d121552d8c9 arm/build: Always handle .ARM.exidx and .ARM.extab sections
date: 3 months ago
config: arm-randconfig-r032-20210201 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 275c6af7d7f1ed63a03d05b4484413e447133269)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c39866f268f89868df17724cd2262d121552d8c9
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c39866f268f89868df17724cd2262d121552d8c9
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm

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 >>, old ones prefixed by <<):

WARNING: modpost: missing MODULE_LICENSE() in drivers/hwtracing/coresight/coresight.o
>> ERROR: modpost: "__aeabi_unwind_cpp_pr0" [kernel/trace/preemptirq_delay_test.ko] undefined!

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