Hi Nathan, I love your patch! Perhaps something to improve: [auto build test WARNING on 7a7fd0de4a9804299793e564a555a49c1fc924cb] url: https://github.com/0day-ci/linux/commits/Nathan-Chancellor/Makefile-Remove-gcc-toolchain-flag/20210929-112213 base: 7a7fd0de4a9804299793e564a555a49c1fc924cb config: x86_64-randconfig-a014-20210929 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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 # https://github.com/0day-ci/linux/commit/74a168f9e88d9edf5aaa8209d2c39e676de2857a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Nathan-Chancellor/Makefile-Remove-gcc-toolchain-flag/20210929-112213 git checkout 74a168f9e88d9edf5aaa8209d2c39e676de2857a # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/entry/ arch/x86/kernel/ arch/x86/lib/ kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/x86/entry/entry_64.S:47:1: warning: DWARF2 only supports one section per compilation unit .section .entry.text, "ax" ^ >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ <instantiation>:1:1: note: while in macro instantiation ALTERNATIVE "jmp .Lend_2", "", ( 7*32+11) ^ arch/x86/entry/entry_64.S:93:2: note: while in macro instantiation SWITCH_TO_KERNEL_CR3 scratch_reg=%rsp ^ arch/x86/entry/entry_64.S:741:2: warning: DWARF2 only supports one section per compilation unit .section .fixup, "ax" ^ -- >> arch/x86/entry/entry_64_compat.S:20:2: warning: DWARF2 only supports one section per compilation unit .section .entry.text, "ax" ^ >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ <instantiation>:1:1: note: while in macro instantiation ALTERNATIVE "jmp .Lend_2", "", ( 7*32+11) ^ arch/x86/entry/entry_64_compat.S:55:2: note: while in macro instantiation SWITCH_TO_KERNEL_CR3 scratch_reg=%rax ^ -- >> arch/x86/kernel/head_64.S:42:2: warning: DWARF2 only supports one section per compilation unit .section ".head.text","ax" ^ arch/x86/kernel/head_64.S:352:2: warning: DWARF2 only supports one section per compilation unit .section ".init.text","ax" ^ -- >> arch/x86/lib/copy_mc_64.S:138:2: warning: DWARF2 only supports one section per compilation unit .section .fixup, "ax" ^ -- >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ arch/x86/lib/copy_page_64.S:17:2: note: while in macro instantiation ALTERNATIVE "jmp copy_page_regs", "", ( 3*32+16) ^ -- >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ arch/x86/lib/copy_user_64.S:58:2: note: while in macro instantiation ALTERNATIVE "", ".byte 0x0f,0x01,0xcb", ( 9*32+20) ^ <instantiation>:15:2: warning: DWARF2 only supports one section per compilation unit .section .fixup,"ax" ^ arch/x86/lib/copy_user_64.S:61:2: note: while in macro instantiation ALIGN_DESTINATION ^ -- >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ arch/x86/lib/getuser.S:56:2: note: while in macro instantiation ALTERNATIVE "", ".byte 0x0f,0x01,0xcb", ( 9*32+20) ^ -- >> arch/x86/lib/memcpy_64.S:10:1: warning: DWARF2 only supports one section per compilation unit .pushsection .noinstr.text, "ax" ^ <instantiation>:13:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ arch/x86/lib/memcpy_64.S:32:2: note: while in macro instantiation ALTERNATIVE_2 "jmp memcpy_orig", "", ( 3*32+16), "jmp memcpy_erms", ( 9*32+ 9) ^ -- >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ arch/x86/lib/memmove_64.S:42:2: note: while in macro instantiation ALTERNATIVE "cmp $0x20, %rdx; jb 1f", "", (18*32+ 4) ^ -- >> <instantiation>:11:2: warning: DWARF2 only supports one section per compilation unit .pushsection .altinstr_replacement,"ax" ^ arch/x86/lib/putuser.S:51:2: note: while in macro instantiation ALTERNATIVE "", ".byte 0x0f,0x01,0xcb", ( 9*32+20) ^ vim +47 arch/x86/entry/entry_64.S 6fd166aae78c0a arch/x86/entry/entry_64.S Peter Zijlstra 2017-12-04 45 ^1da177e4c3f41 arch/x86_64/kernel/entry.S Linus Torvalds 2005-04-16 46 .code64 ea7145477a461e arch/x86/kernel/entry_64.S Jiri Olsa 2011-03-07 @47 .section .entry.text, "ax" ea7145477a461e arch/x86/kernel/entry_64.S Jiri Olsa 2011-03-07 48 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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