Updated release notes and status pages

Author: H-G-Hristov

libcxx/docs/ReleaseNotes/19.rst

@@ -43,7 +43,7 @@ Implemented Papers
 - P2819R2 - Add ``tuple`` protocol to ``complex``
 - P2495R3 - Interfacing ``stringstream``\s with ``string_view``
 - P2867R2 - Remove Deprecated ``strstream``\s From C++26
-- P2869R3 - Remove Deprecated ``shared_ptr`` Atomic Access APIs from C++26
+- P2869R4 - Remove Deprecated ``shared_ptr`` Atomic Access APIs from C++26
 - P2872R3 - Remove ``wstring_convert`` From C++26
 - P2302R4 - ``std::ranges::contains``
 - P1659R3 - ``std::ranges::starts_with`` and ``std::ranges::ends_with``

libcxx/docs/Status/Cxx2cPapers.csv

@@ -48,7 +48,7 @@
 "","","","","","",""
 "`P2875R4 <https://wg21.link/P2875R4>`__","LWG","Undeprecate ``polymorphic_allocator::destroy`` for C++26","Tokyo March 2024","|Complete|","15.0",""
 "`P2867R2 <https://wg21.link/P2867R2>`__","LWG","Remove Deprecated ``strstreams`` From C++26","Tokyo March 2024","|Complete|","19.0",""
-"`P2869R4 <https://wg21.link/P2869R4>`__","LWG","Remove Deprecated ``shared_ptr`` Atomic Access APIs from C++26","Tokyo March 2024","","",""
+"`P2869R4 <https://wg21.link/P2869R4>`__","LWG","Remove Deprecated ``shared_ptr`` Atomic Access APIs from C++26","Tokyo March 2024","|Complete|","19.0",""
 "`P2872R3 <https://wg21.link/P2872R3>`__","LWG","Remove ``wstring_convert`` From C++26","Tokyo March 2024","|Complete|","19.0",""
 "`P3107R5 <https://wg21.link/P3107R5>`__","LWG","Permit an efficient implementation of ``std::print``","Tokyo March 2024","","","|format| |DR|"
 "`P3142R0 <https://wg21.link/P3142R0>`__","LWG","Printing Blank Lines with ``println``","Tokyo March 2024","","","|format|"

libcxx/docs/UsingLibcxx.rst

@@ -277,6 +277,10 @@ C++26 Specific Configuration Macros
 **_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM**:
   This macro is used to re-enable all named declarations in ``<strstream>``.
 
+**_LIBCPP_ENABLE_CXX26_REMOVED_SHARED_PTR_ATOMICS**:
+  This macro is used to re-enable all ``shared_ptr`` atomic access APIs in ``<memory>``.
+
+
 **_LIBCPP_ENABLE_CXX26_REMOVED_WSTRING_CONVERT**:
   This macro is used to re-enable the ``wstring_convert`` and ``wbuffer_convert``
   in ``<locale>``.