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From:   Nick Desaulniers <ndesaulniers@google.com>
Date:   Fri, 29 Jan 2021 16:46:02 -0800
Message-ID: <CAKwvOdniSiaBkGOO32ZuGCv=1SBwaqdRsHUo31n+O+g0ek5P_Q@mail.gmail.com>
Subject: Re: [PATCH v6 0/2] Kbuild: DWARF v5 support
To:     Sedat Dilek <sedat.dilek@gmail.com>
Cc:     Masahiro Yamada <masahiroy@kernel.org>,
        Nathan Chancellor <natechancellor@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Clang-Built-Linux ML <clang-built-linux@googlegroups.com>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        linux-arch <linux-arch@vger.kernel.org>,
        Jakub Jelinek <jakub@redhat.com>,
        Fangrui Song <maskray@google.com>,
        Caroline Tice <cmtice@google.com>,
        Nick Clifton <nickc@redhat.com>, Yonghong Song <yhs@fb.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Andrii Nakryiko <andrii@kernel.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
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On Fri, Jan 29, 2021 at 4:08 PM Sedat Dilek <sedat.dilek@gmail.com> wrote:
>
> On Fri, Jan 29, 2021 at 8:43 PM Nick Desaulniers
> <ndesaulniers@google.com> wrote:
> >
> > DWARF v5 is the latest standard of the DWARF debug info format.
> >
> > DWARF5 wins significantly in terms of size and especially so when mixed
> > with compression (CONFIG_DEBUG_INFO_COMPRESSED).
> >
> > Link: http://www.dwarfstd.org/doc/DWARF5.pdf
> >
> > Patch 1 is a cleanup that lays the ground work and isn't DWARF
> > v5 specific.
> > Patch 2 implements Kconfig and Kbuild support for DWARFv5.
> >
>
> When you will do a v7...
>
> Can you look also at places where we have hardcoded DWARF-2 handling...

Ah, sorry, I just saw this now, after sending v7.  Can we wait to
purge DWARF v2 until after we have DWARF v5?

In fact, if they are orthogonal like I suspect, why don't you send
some patches and I will help you test them?
-- 
Thanks,
~Nick Desaulniers