Hi Masahiro, have you had time to review v3 of this patch? On Mon, Nov 9, 2020 at 10:35 AM Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > > Clang's integrated assembler produces the warning for assembly files: > > warning: DWARF2 only supports one section per compilation unit > > If -Wa,-gdwarf-* is unspecified, then debug info is not emitted for > assembly sources (it is still emitted for C sources). This will be > re-enabled for newer DWARF versions in a follow up patch. > > Enables defconfig+CONFIG_DEBUG_INFO to build cleanly with > LLVM=1 LLVM_IAS=1 for x86_64 and arm64. > > Cc: <stable@xxxxxxxxxxxxxxx> > Link: https://github.com/ClangBuiltLinux/linux/issues/716 > Reported-by: Dmitry Golovin <dima@xxxxxxxxxx> > Reported-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > Suggested-by: Dmitry Golovin <dima@xxxxxxxxxx> > Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > Suggested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx> > Reviewed-by: Fangrui Song <maskray@xxxxxxxxxx> > Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > --- > Makefile | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/Makefile b/Makefile > index f353886dbf44..7e899d356902 100644 > --- a/Makefile > +++ b/Makefile > @@ -826,7 +826,9 @@ else > DEBUG_CFLAGS += -g > endif > > +ifneq ($(LLVM_IAS),1) > KBUILD_AFLAGS += -Wa,-gdwarf-2 > +endif > > ifdef CONFIG_DEBUG_INFO_DWARF4 > DEBUG_CFLAGS += -gdwarf-4 > -- > 2.29.2.222.g5d2a92d10f8-goog > -- Thanks, ~Nick Desaulniers
