+2024-04-03 Iain Sandoe <iain@sandoe.co.uk>
+
+ Backported from master:
+ 2024-02-19 Iain Sandoe <iain@sandoe.co.uk>
+ Jonathan Wakely <jwakely@redhat.com>
+
+ PR target/112397
+ * configure: Regenerate.
+ * configure.ac: Detect if we are building for Darwin.
+ * libsupc++/Makefile.am: If we are building for Darwin, then
+ suppress hot/cold partitioning for the array allocators.
+ * libsupc++/Makefile.in: Regenerated.
+
+2024-04-03 Iain Sandoe <iain@sandoe.co.uk>
+
+ Backported from master:
+ 2024-03-19 Iain Sandoe <iain@sandoe.co.uk>
+
+ * testsuite/lib/dg-options.exp (atomic_link_flags): Emit a -B
+ option for the path to the uninstalled libatomic.
+
+2024-04-03 Iain Sandoe <iain@sandoe.co.uk>
+
+ Backported from master:
+ 2024-03-19 Iain Sandoe <iain@sandoe.co.uk>
+
+ * testsuite/lib/libstdc++.exp (v3_target_compile): Instead of
+ /dev/null, use a temporary file for test executables on Darwin.
+
+2024-04-03 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2024-03-22 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/114401
+ * include/bits/hashtable.h (_Hashtable::_M_reinsert_node): Call
+ release() on node handle instead of just zeroing its pointer.
+ (_Hashtable::_M_reinsert_node_multi): Likewise.
+ (_Hashtable::_M_merge_unique): Likewise.
+ (_Hashtable::_M_merge_multi): Likewise.
+ * include/bits/node_handle.h (_Node_handle_common::release()):
+ New member function.
+ (_Node_handle_common::_Optional_alloc::_M_empty): Remove
+ unnecessary union member.
+ (_Node_handle_common): Declare _Hashtable as a friend.
+ * include/bits/stl_tree.h (_Rb_tree::_M_reinsert_node_unique):
+ Call release() on node handle instead of just zeroing its
+ pointer.
+ (_Rb_tree::_M_reinsert_node_equal): Likewise.
+ (_Rb_tree::_M_reinsert_node_hint_unique): Likewise.
+ (_Rb_tree::_M_reinsert_node_hint_equal): Likewise.
+ * testsuite/23_containers/multiset/modifiers/114401.cc: New test.
+ * testsuite/23_containers/set/modifiers/114401.cc: New test.
+ * testsuite/23_containers/unordered_multiset/modifiers/114401.cc: New test.
+ * testsuite/23_containers/unordered_set/modifiers/114401.cc: New test.
+
+2024-04-03 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2024-03-22 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/113841
+ * include/bits/allocator.h (allocator<cv T>): Add default
+ constructor to partial specializations for cv-qualified types.
+ * include/bits/stl_vector.h (_Vector_impl::_Vector_impl()):
+ Constrain so that it's only present if the allocator is default
+ constructible.
+ * include/bits/stl_bvector.h (_Bvector_impl::_Bvector_impl()):
+ Likewise.
+ * testsuite/23_containers/vector/cons/113841.cc: New test.
+
+2024-04-03 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2024-03-19 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/114367
+ * include/bits/stl_bvector.h (_M_allocate): Use allocator's
+ construct function to begin lifetime of words.
+
2024-03-20 François Dumont <fdumont@gcc.gnu.org>
* include/std/iterator (__cpp_lib_null_iterators): Define regardless of