From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id AE06C3858438; Tue, 18 Apr 2023 15:58:37 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AE06C3858438
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1681833517;
	bh=FwgzsZ/yh2y3GAYjWI1rmat9juquuVMJ6ZX6HEH36sc=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=GabcXRbidyGGBH/m1xwzWNaBVUjFcma0Kjtt+LeUXFYC54gHy5D8L9daCRJrhc6p4
	 5YR1KRFTTiZmMmTmJ4MgYrae98mCrzbJD8/6kiHk09imVLyYNqM46Sg7advliwPd4c
	 /jgAqd1auf8H0DftPrYrRmTCV1F8JwDE/UoC/Zi4=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/108969] [13/14 Regression] Initializing iostreams in
 the library needs a GLIBCXX_3.4.31 versioned symbol
Date: Tue, 18 Apr 2023 15:58:36 +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: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: redi at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 13.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-108969-4-HfzeTj0AcI@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-108969-4@http.gcc.gnu.org/bugzilla/>
References: <bug-108969-4@http.gcc.gnu.org/bugzilla/>
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: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108969

--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:b7c54e3f48086c29179f7765a35c381de5109a0a

commit r14-43-gb7c54e3f48086c29179f7765a35c381de5109a0a
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Apr 18 14:37:38 2023 +0100

    libstdc++: Export global iostreams with GLIBCXX_3.4.31 symver [PR108969]

    Since GCC 13 the global iostream objects are only initialized once in
    libstdc++, and not by a std::ios::Init object in every translation unit
    that includes <iostream>. To avoid using uninitialized streams defined
    in an older libstdc++.so, translation units using the global iostreams
    should depend on the GLIBCXX_3.4.31 symver.

    Define std::cin as std::__io::cin and then export it as
    std::cin@@GLIBCXX_3.4.31 so that references to std::cin bind to the new
    symver. Also export it as @GLIBCXX_3.4 for backwards compatibility

    libstdc++-v3/ChangeLog:

            PR libstdc++/108969
            * src/Makefile.am: Move globals_io.cc to here.
            * src/Makefile.in: Regenerate.
            * src/c++98/Makefile.am: Remove globals_io.cc from here.
            * src/c++98/Makefile.in: Regenerate.
            * src/c++98/globals_io.cc [_GLIBCXX_SYMVER_GNU] (cin): Adjust
            symbol name and then export with GLIBCXX_3.4.31 symver.
            (cout, cerr, clog, wcin, wcout, wcerr, wclog): Likewise.
            * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/i486-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/m68k-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/s390x-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt:
            Regenerate.
            * config/abi/pre/gnu.ver: Add iostream objects to new symver.=