On Thu, Nov 12, 2020 at 7:22 PM kernel test robot <[email protected]> wrote: > > Hi Fangrui, > > FYI, the error/warning still remains. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: 585e5b17b92dead8a3aca4e3c9876fbca5f7e0ba > commit: ca9b31f6bb9c6aa9b4e5f0792f39a97bbffb8c51 Makefile: Fix > GCC_TOOLCHAIN_DIR prefix for Clang cross compilation > date: 4 months ago > config: powerpc-randconfig-r031-20201113 (attached as .config) > compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project > 9e0c35655b6e8186baef8840b26ba4090503b554) > 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 powerpc cross compiling tool for clang build > # apt-get install binutils-powerpc-linux-gnu > # > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca9b31f6bb9c6aa9b4e5f0792f39a97bbffb8c51 > git remote add linus > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout ca9b31f6bb9c6aa9b4e5f0792f39a97bbffb8c51 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross > ARCH=powerpc > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <[email protected]> > > All errors (new ones prefixed by >>): > > Assembler messages: > >> Error: invalid switch -me200 > >> Error: unrecognized option -me200 > clang-12: error: assembler command failed with exit code 1 (use -v to see > invocation) > make[2]: *** [scripts/Makefile.build:281: scripts/mod/empty.o] Error 1 > make[2]: Target '__build' not remade because of errors. > make[1]: *** [Makefile:1174: prepare0] Error 2 > make[1]: Target 'prepare' not remade because of errors. > make: *** [Makefile:185: __sub-make] Error 2 > make: Target 'prepare' not remade because of errors. > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/[email protected]
This can be ignored. The LLVM integrated assembler does not recognize -me200 (-Wa,-me200 in arch/powerpc/Makefile). I guess the GNU as -m option is similar to .arch or .machine and controls what instructions are recognized. The integrated assembler tends to support all instructions (conditional supporting some instructions has some challenges; in the end I have patched parsing but ignoring `.arch` for x86-64 and ignoring `.machine ppc64` for ppc64) (In addition, e200 is a 32-bit Power ISA microprocessor. 32-bit support may get less attention in LLVM.)
