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From: "jakub 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: Wed, 19 Apr 2023 14:25:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108969

--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
extern int cinalias __attribute__((__symver__ ("_ZSt4cin@GLIBCXX_3.4")));
void foo ()
{
  cinalias++;
}
doesn't work to refer to older symver, but
extern int cinalias;
asm (".symver cinalias, _ZSt4cin@GLIBCXX_3.4");
void foo ()
{
  cinalias++;
}
does.  Of course, needs testing with old binutils and the like.=