Re: [PATCH v5 0/3] Kbuild: DWARF v5 support

[Andrii Nakryiko]

On Fri, Jan 15, 2021 at 3:34 PM Nick Desaulniers
<ndesaulniers@xxxxxxxxxx> wrote:
>
> On Fri, Jan 15, 2021 at 3:24 PM Yonghong Song <yhs@xxxxxx> wrote:
> >
> >
> >
> > On 1/15/21 1:53 PM, Sedat Dilek wrote:
> > > En plus, I encountered breakage with GCC v10.2.1 and LLVM=1 and
> > > CONFIG_DEBUG_INFO_DWARF4.
> > > So might be good to add a "depends on !DEBUG_INFO_BTF" in this combination.
>
> Can you privately send me your configs that repro? Maybe I can isolate
> it to a set of configs?

Why privately? To reproduce and fix the issue we (BPF and pahole
community) would need the config as well.


>
> >
> > I suggested not to add !DEBUG_INFO_BTF to CONFIG_DEBUG_INFO_DWARF4.
> > It is not there before and adding this may suddenly break some users.
> >
> > If certain combination of gcc/llvm does not work for
> > CONFIG_DEBUG_INFO_DWARF4 with pahole, this is a bug bpf community
> > should fix.
>
> Is there a place I should report bugs?

bpf@xxxxxxxxxxxxxxx (BPF in general) and dwarves@xxxxxxxxxxxxxxx
(pahole, which seems to be emitting these warnings and having problems
with DWARF5).


>
> >
> > >
> > > I had some other small nits commented in the single patches.
> > >
> > > As requested in your previous patch-series, feel free to add my:
> > >
> > > Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
>
> Yeah, I'll keep it if v6 is just commit message changes.
>
> --
> Thanks,
> ~Nick Desaulniers