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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/108969] [13 Regression] Initializing iostreams in the
 library needs a GLIBCXX_3.4.31 versioned symbol
Date: Fri, 03 Mar 2023 17:25:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108969

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ppalka at gcc dot gnu.org

--- Comment #11 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Would it make sense to backport a "transition" version of r13-3707 to the
release branches, one that just adds the static __ioinit object into the
compiled library (without the init_priority attribute, since we only care a=
bout
dynamic linking compatibility) and doesn't remove the static object from
<iostream>?

That way, a program compiled with GCC 13 and linked against libstdc++ 12.3
would still work w.r.t. stream initialization.  And this library-side
initialization should be safe since the ios_base::Init cdtors are idempoten=
t.=