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Date: Thu, 2 Mar 2023 00:52:33 +0100
From: Mark Wielaard <mark@klomp.org>
To: John Moon <quic_johmoo@quicinc.com>
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Subject: Re: [PATCH v2 0/2] Validating UAPI backwards compatibility
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Hi John,

On Wed, Mar 01, 2023 at 02:33:00PM -0800, John Moon via Libabigail 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.

I don't remember any specific fixes for clang in libdw for elfutils
0.171. But elfutils 0.171 was the first release that supported most of
DWARF5 (including GNU DebugFission and split dwarf).

> 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.

Please do add this check. elfutils 0.170 is almost 6 years old now,
there have been many, many bug fixes since then (current release is
0.188 from Nov 2022).

Thanks,

Mark