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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/103407] [12 regression] abi_check FAILs on Solaris
Date: Mon, 28 Feb 2022 14:22:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103407

--- Comment #10 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot =
Uni-Bielefeld.DE> ---
> --- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> Oh dear, yes, wrong patch. I'll attach the right one in a few hours.

I've now managed to test it on both Solaris 11.3 and 11.4.  However, it
didn't work on 11.4 and in hindsight it's clear why not:
_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT is always 0 on
Solaris, as explained in this snippet from acinclude.m4:

     # The Solaris 2 runtime linker doesn't support the GNU extension of
     # binding the same symbol to different versions=