From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 209E63858D1E; Fri, 1 Sep 2023 23:17:21 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 209E63858D1E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1693610241; bh=qJ8rpkjXfMuQaMPOb6q6fPdwymp7xB8F9z6wLokWkPg=; h=From:To:Subject:Date:In-Reply-To:References:From; b=ZGZY0sCVtXMrLYrnt0U0ytkJxYG29u3QxtzoiUtrAqkUalmfTNH4TsrfT3+3CUUdd tSCfCz+fxloA+/7iJ1hjWaSUukB7vyKyWyTk7NRI1czi/IU/NdcS3GfgAx1zi8+Ujr EWtGOAa4ND0W4OYW+3elXiRk7viZaIw91J5jis5k= From: "rs2740 at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/111050] [11/12/13/14 Regression] ABI break in _Hash_node_value_base since GCC 11 Date: Fri, 01 Sep 2023 23:17:20 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 13.0 X-Bugzilla-Keywords: ABI X-Bugzilla-Severity: normal X-Bugzilla-Who: rs2740 at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.5 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111050 --- Comment #2 from TC --- The impacted members we observed are `_Hash_node_value_base::_M_valptr` and `_Hash_node_value_base::_M_v`. I think the layout of `_Hash_node` didn't change. And I'm not seeing why fixing this will require breaking ABI again. For example, if the affected functions are marked always_inline (or renamed, or have their mangling otherwise changed), I would expect the resulting code t= o be linkable with either the GCC10 version or the current version of the code, unless I'm missing something?=