[committed] libstdc++: Document new libstdc++.so symbol versions

[Jonathan Wakely via Gcc-patches]

Pushed to trunk. I'll backport the first line to gcc-12 too.

-- >8 --

libstdc++-v3/ChangeLog:

        * doc/xml/manual/abi.xml: Document GLIBCXX_3.4.30 and
        GLIBCXX_3.4.31 versions.
        * doc/html/manual/abi.html: Regenerate.
---
 libstdc++-v3/doc/html/manual/abi.html | 2 +-
 libstdc++-v3/doc/xml/manual/abi.xml   | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/doc/xml/manual/abi.xml 
b/libstdc++-v3/doc/xml/manual/abi.xml
index c2c0c028a8b..0153395f477 100644
--- a/libstdc++-v3/doc/xml/manual/abi.xml
+++ b/libstdc++-v3/doc/xml/manual/abi.xml
@@ -348,6 +348,8 @@ compatible.
     <listitem><para>GCC 9.3.0: GLIBCXX_3.4.28, CXXABI_1.3.12</para></listitem>
     <listitem><para>GCC 10.1.0: GLIBCXX_3.4.28, CXXABI_1.3.12</para></listitem>
     <listitem><para>GCC 11.1.0: GLIBCXX_3.4.29, CXXABI_1.3.13</para></listitem>
+    <listitem><para>GCC 12.1.0: GLIBCXX_3.4.30, CXXABI_1.3.13</para></listitem>
+    <listitem><para>GCC 13.1.0: GLIBCXX_3.4.31, CXXABI_1.3.13</para></listitem>
 
     </itemizedlist>
     </listitem>
-- 
2.37.3