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From:   Nick Desaulniers <ndesaulniers@google.com>
Date:   Wed, 1 Mar 2023 15:33:50 -0800
Message-ID: <CAKwvOdmUm8oEiiYt64oe0MY+H3U0TxpzVhWbhfvptTDkKHUFcA@mail.gmail.com>
Subject: Re: [PATCH v2 0/2] Validating UAPI backwards compatibility
To:     John Moon <quic_johmoo@quicinc.com>
Cc:     Masahiro Yamada <masahiroy@kernel.org>,
        Nathan Chancellor <nathan@kernel.org>,
        Nicolas Schier <nicolas@fjasle.eu>,
        linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-arm-msm@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Randy Dunlap <rdunlap@infradead.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Bjorn Andersson <andersson@kernel.org>,
        Todd Kjos <tkjos@google.com>,
        Matthias Maennich <maennich@google.com>,
        Giuliano Procida <gprocida@google.com>,
        kernel-team@android.com, libabigail@sourceware.org,
        Jordan Crouse <jorcrous@amazon.com>,
        Trilok Soni <quic_tsoni@quicinc.com>,
        Satya Durga Srinivasu Prabhala <quic_satyap@quicinc.com>,
        Elliot Berman <quic_eberman@quicinc.com>
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On Wed, Mar 1, 2023 at 2:33=E2=80=AFPM John Moon <quic_johmoo@quicinc.com> =
wrote:
>
> With some additional help from Nick offline, we determined that the
> issue isn't with clang, but with libdw (from elfutils). You need at
> least libdw version 0.171 for the abidiff tool to work correctly with
> clang (in this particular case). Ubuntu 18.04 ships with version 0.170.
>
> If there's any interest, it'd be fairly easy to add a check for this
> condition under the check_deps() function in the script.

Good job John; mind sending a v3 with that addition, and the commit
message updated?
--=20
Thanks,
~Nick Desaulniers