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From: "jwakely.gcc at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/25753] New: Add note to add/removed functions that are
 in comdat sections
Date: Tue, 31 Mar 2020 12:17:44 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25753

            Bug ID: 25753
           Summary: Add note to add/removed functions that are in comdat
                    sections
           Product: libabigail
           Version: unspecified
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: jwakely.gcc at gmail dot com
                CC: libabigail at sourceware dot org
  Target Milestone: ---

For C++ libraries a small code change or a slightly different compiler vers=
ion
can alter inlining decisions, causing previously emitted functions to be
inlined and disappear from the generated code, causing abigail to report
removed functions. The opposite can also happen where previously inlined
functions start to be emitted, and abigail reports added functions.

If an added/removed symbol is in a comdat section, it probably means it's
inline and not actually a part of the library's ABI. The fact a symbol is in
comdat is already in the metadata, so it would be useful to add a note about
comdat when showing added/removed functions.

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