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From: "redi 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: Tue, 28 Feb 2023 13:28:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108969

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The patch above means that a program using cout (or any of the standard
streams) gets:

0000000000404040 B _ZSt4cout@GLIBCXX_3.4.31

instead of:

0000000000404040 B _ZSt4cout@GLIBCXX_3.4

And then it fails to run with the older libstdc++.so:

./a.out: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.31' not found (require=
d by
./a.out)


But I agree that it's not a complete solution for all targets, just a quick=
 fix
for linux distros where this is most likely to cause problems today.=