+2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/120187
+ * include/c_global/ciso646: Only give deprecated warning for
+ C++20 and later.
+ * include/c_global/ccomplex: Add @since to Doxygen comment.
+ * include/c_global/cstdalign: Likewise.
+ * include/c_global/cstdbool: Likewise.
+ * include/c_global/ctgmath: Likewise.
+ * testsuite/18_support/headers/ciso646/macros.cc: Remove
+ dg-warning for c++17_only effective target.
+ * testsuite/18_support/headers/ciso646/macros-2.cc: New test.
+
+2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/120198
+ * include/bits/version.def (scoped_lock): Do not depend on
+ gthreads or hosted.
+ * include/bits/version.h: Regenerate.
+ * include/std/mutex (scoped_lock): Update comment.
+ * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
+ Remove dg-require-gthreads and use custom lockable type instead
+ of std::mutex. Check that typedef is only present for a single
+ template argument.
+
+2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ * doc/xml/manual/status_cxx2023.xml: Update status of proposals
+ implemented after GCC 14.2 release.
+ * doc/html/*: Regenerate.
+
+2025-05-12 Patrick Palka <ppalka@redhat.com>
+
+ Backported from master:
+ 2025-05-12 Patrick Palka <ppalka@redhat.com>
+
+ PR libstdc++/119714
+ PR libstdc++/112490
+ * include/std/expected (expected::operator==): Replace
+ non-dependent std::expected function parameter with a dependent
+ one of type expected<_Vp, _Er> where _Vp matches _Tp.
+ * testsuite/20_util/expected/119714.cc: New test.
+
+2025-05-12 Patrick Palka <ppalka@redhat.com>
+
+ Backported from master:
+ 2025-04-29 Patrick Palka <ppalka@redhat.com>
+
+ PR libstdc++/119427
+ * include/std/flat_map (_Flat_map_impl::erase_if): Replace
+ this hidden friend with ...
+ (_Flat_map_impl::_M_erase_if): ... this member function.
+ (flat_map): Export _Flat_map_impl::_M_erase_if.
+ (erase_if(flat_map)): Define.
+ (flat_multimap): Export _Flat_map_impl::_M_erase_if.
+ (erase_if(flat_multimap)): Define.
+ * include/std/flat_set (_Flat_set_impl::erase_if): Replace
+ with ...
+ (_Flat_set_impl::_M_erase_if): ... this member function.
+ (flat_set): Export _Flat_set_impl::_M_erase_if.
+ (erase_if(flat_set)): Define.
+ (flat_multiset): Export _Flat_set_impl::_M_erase_if.
+ (erase_if(flat_multiset)): Define.
+ * testsuite/23_containers/flat_map/1.cc (test07): New test.
+ * testsuite/23_containers/flat_multimap/1.cc (test07): New test.
+ * testsuite/23_containers/flat_multiset/1.cc (test09): New test.
+ * testsuite/23_containers/flat_set/1.cc (test09): New test.
+
+2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/118260
+ * python/hook.in: Suppress output from gdb.execute calls to
+ register skips.
+
+2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2025-05-12 Jonathan Wakely <jwakely@redhat.com>
+
+ * doc/xml/manual/status_cxx2017.xml: Update status for
+ std::to_chars and std::from_chars.
+ * doc/html/manual/*: Regenerate.
+
2025-05-07 Jonathan Wakely <jwakely@redhat.com>
Backported from master: