Messages in this thread | | | From | Nick Desaulniers <> | Date | Mon, 16 Nov 2020 15:41:42 -0800 | Subject | Re: [PATCH v3] Kbuild: do not emit debug info for assembly with LLVM_IAS=1 |
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Hi Masahiro, have you had time to review v3 of this patch?
On Mon, Nov 9, 2020 at 10:35 AM Nick Desaulniers <ndesaulniers@google.com> 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@vger.kernel.org> > Link: https://github.com/ClangBuiltLinux/linux/issues/716 > Reported-by: Dmitry Golovin <dima@golovin.in> > Reported-by: Nathan Chancellor <natechancellor@gmail.com> > Suggested-by: Dmitry Golovin <dima@golovin.in> > Suggested-by: Nathan Chancellor <natechancellor@gmail.com> > Suggested-by: Sedat Dilek <sedat.dilek@gmail.com> > Reviewed-by: Fangrui Song <maskray@google.com> > Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> > --- > 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
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