Various cris builds: init/built-in.o: In function `repair_env_string': main.c:(.init.text+0x106): undefined reference to `abort' arch/cris/mm/built-in.o: In function `do_page_fault': (.text+0x44e): undefined reference to `abort' arch/cris/mm/built-in.o: In function `mem_init': (.init.text+0x12): undefined reference to `abort' arch/cris/arch-v10/kernel/built-in.o: In function `cris_request_io_interface': (.text+0x219e): undefined reference to `abort' arch/cris/arch-v10/kernel/built-in.o: In function `cris_free_io_interface': (.text+0x2644): undefined reference to `abort' kernel/built-in.o:(.text+0x416): more undefined references to `abort' follow Caused by commit commit b068c10cde7f3e ("bug.h: work around GCC PR82365 in BUG()"). Reverting it fixes the problem. I would suggest to undo the cris specific changes in that backport. An alternative would be for me to stop build-testing for the architecture if there is no further interest in keeping it alive for older branches. Guenter