[gcc r11-7194] libstdc++: Document when C++11/14/17 support became stable [PR 99058]

[Jonathan Wakely]

https://gcc.gnu.org/g:ce43c906049b828c0472d8499b52ac6233c869d0

commit r11-7194-gce43c906049b828c0472d8499b52ac6233c869d0
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Feb 11 15:35:23 2021 +0000

    libstdc++: Document when C++11/14/17 support became stable [PR 99058]
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/99058
            * doc/xml/manual/status_cxx2011.xml: Document when support
            became stable.
            * doc/xml/manual/status_cxx2014.xml: Likewise.
            * doc/xml/manual/status_cxx2017.xml: Likewise.
            * doc/html/manual/status.html: Regenerate.

Diff:
---
 libstdc++-v3/doc/html/manual/status.html       | 9 +++++++++
 libstdc++-v3/doc/xml/manual/status_cxx2011.xml | 3 +++
 libstdc++-v3/doc/xml/manual/status_cxx2014.xml | 3 +++
 libstdc++-v3/doc/xml/manual/status_cxx2017.xml | 3 +++
 4 files changed, 18 insertions(+)

diff --git a/libstdc++-v3/doc/html/manual/status.html b/libstdc++-v3/doc/html/manual/status.html
index cea0e5006bb..daa74a85c6f 100644
--- a/libstdc++-v3/doc/html/manual/status.html
+++ b/libstdc++-v3/doc/html/manual/status.html
@@ -154,6 +154,9 @@ features. See <a class="link" href="using.html#manual.intro.using.flags" title="
 options. The pre-defined symbol
 <code class="constant">__cplusplus</code> is used to check for the
 presence of the required flag.
+GCC 5.1 was the first release with non-experimental C++11 support,
+so the API and ABI of features added in C++11 is only stable
+since that release.
 </p><p>
 This status table is based on the table of contents of ISO/IEC 14882:2011.
 </p><p>
@@ -409,6 +412,9 @@ features. See <a class="link" href="using.html#manual.intro.using.flags" title="
 options. The pre-defined symbol
 <code class="constant">__cplusplus</code> is used to check for the
 presence of the required flag.
+GCC 6.1 was the first release with non-experimental C++14 support,
+so the API and ABI of features added in C++14 is only stable
+since that release.
 </p><p>
 This status table is based on the table of contents of ISO/IEC 14882:2014.
 Some subclauses are not shown in the table where the content is unchanged
@@ -538,6 +544,9 @@ features. See <a class="link" href="using.html#manual.intro.using.flags" title="
 options. The pre-defined symbol
 <code class="constant">__cplusplus</code> is used to check for the
 presence of the required flag.
+GCC 9.1 was the first release with non-experimental C++17 support,
+so the API and ABI of features added in C++17 is only stable
+since that release.
 </p><p>
 This section describes the C++17 and library TS support in mainline GCC,
 not in any particular release.
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2011.xml b/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
index be873962597..88844f8f0cc 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
@@ -24,6 +24,9 @@ features. See <link linkend="manual.intro.using.flags">dialect</link>
 options. The pre-defined symbol
 <constant>__cplusplus</constant> is used to check for the
 presence of the required flag.
+GCC 5.1 was the first release with non-experimental C++11 support,
+so the API and ABI of features added in C++11 is only stable
+since that release.
 </para>
 
 <para>
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2014.xml b/libstdc++-v3/doc/xml/manual/status_cxx2014.xml
index 61bea5adad5..2cf5f629efb 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2014.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2014.xml
@@ -17,6 +17,9 @@ features. See <link linkend="manual.intro.using.flags">dialect</link>
 options. The pre-defined symbol
 <constant>__cplusplus</constant> is used to check for the
 presence of the required flag.
+GCC 6.1 was the first release with non-experimental C++14 support,
+so the API and ABI of features added in C++14 is only stable
+since that release.
 </para>
 
 <para>
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
index aa34b8c3cf5..b1c12bd3799 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
@@ -17,6 +17,9 @@ features. See <link linkend="manual.intro.using.flags">dialect</link>
 options. The pre-defined symbol
 <constant>__cplusplus</constant> is used to check for the
 presence of the required flag.
+GCC 9.1 was the first release with non-experimental C++17 support,
+so the API and ABI of features added in C++17 is only stable
+since that release.
 </para>
 
 <para>