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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/103407] [12 regression] abi_check FAILs on Solaris
Date: Wed, 23 Feb 2022 15:57:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103407

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Rainer, is an executable linked against libstdc++.so.6.0.29 on Solaris 11.3
expected to work on an 11.4 machine with libstdc++.so.6.0.30?

With a #ifdef kluge in config/abi/pre/gnu.ver we can make the new from_chars
symbols get version GLIBCXX_3.4.30 on 11.3 and keep them at version 3.4.29 =
for
11.4. But that would mean a program linked on 11.3 and looking for
_ZSt10from_charsPKcS0_RdSt12chars_format@GLIBCXX_3.4.30 would not find it on
11.4. We can fix that with some symbol aliases for Solaris 11.4 to make it
available for both symbol versions if needed.=