+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-09-15 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc:
+ Fix test to work for C++23 and C++26 too.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-08-17 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/24_iterators/move_iterator/p2520r0.cc: Add no_pch.
+ * testsuite/std/format/functions/format.cc: Likewise.
+ * testsuite/std/format/functions/format_c++23.cc: Likewise.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-08-16 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/basic_string.tcc (resize_and_overwrite): Invoke
+ the callable with the same size as resize_and_overwrite was
+ called with.
+ * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
+ Check with small values for the new size.
+ * testsuite/std/format/functions/format.cc: Check wide
+ formatting of double values that produce small strings.
+ * testsuite/std/format/functions/format_c++23.cc: New test.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-08-17 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/lib/dg-options.exp (add_options_for_no_pch): Remove
+ any "-include bits/stdc++.h" from options and add the macro to
+ the existing options instead of replacing them.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-08-09 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/shared_ptr_atomic.h (atomic): Change class-head
+ to struct.
+ * include/bits/stl_tree.h (_Rb_tree_merge_helper): Change
+ class-head to struct in friend declaration.
+ * include/std/chrono (tzdb_list::_Node): Likewise.
+ * include/std/future (_Task_state_base, _Task_state): Likewise.
+ * include/std/scoped_allocator (__inner_type_impl): Likewise.
+ * include/std/valarray (_BinClos, _SClos, _GClos, _IClos)
+ (_ValFunClos, _RefFunClos): Change class-head to struct.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-08-09 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/alloc_traits.h (allocate): Add [[maybe_unused]]
+ attribute.
+ * include/bits/regex_executor.tcc: Remove name of unused
+ parameter.
+ * include/bits/shared_ptr_atomic.h (atomic_is_lock_free):
+ Likewise.
+ * include/bits/stl_uninitialized.h: Likewise.
+ * include/bits/streambuf_iterator.h (operator==): Likewise.
+ * include/bits/uses_allocator.h: Likewise.
+ * include/c_global/cmath (isfinite, isinf, isnan): Likewise.
+ * include/std/chrono (zoned_time): Likewise.
+ * include/std/future (__future_base::_S_allocate_result):
+ Likewise.
+ (packaged_task): Likewise.
+ * include/std/optional (_Optional_payload_base): Likewise.
+ * include/std/scoped_allocator (__inner_type_impl): Likewise.
+ * include/std/tuple (_Tuple_impl): Likewise.
+
+2023-11-09 Pekka Seppänen <pexu@gcc.mail.kapsi.fi>
+
+ Backported from master:
+ 2023-09-11 Pekka Seppänen <pexu@gcc.mail.kapsi.fi>
+
+ * src/c++11/cow-locale_init.cc: Add [[maybe_unused]] attribute.
+ * src/c++17/fs_path.cc (path::_S_convert_loc): Likewise.
+ * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
+
+2023-11-09 Alexey Lapshin <alexey.lapshin@espressif.com>
+
+ Backported from master:
+ 2023-09-08 Alexey Lapshin <alexey.lapshin@espressif.com>
+
+ * src/libbacktrace/Makefile.am: Remove -Werror.
+ * src/libbacktrace/Makefile.in: Regenerate.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-09-07 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/23_containers/unordered_map/operations/1.cc: Add
+ dg-options for C++20 mode.
+ * testsuite/23_containers/unordered_multimap/operations/1.cc:
+ Likewise.
+ * testsuite/23_containers/unordered_multiset/operations/1.cc:
+ Likewise.
+ * testsuite/23_containers/unordered_set/operations/1.cc:
+ Likewise.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-08-09 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/new_allocator.h (__new_allocator): Define copy
+ assignment operator as defaulted.
+ * include/std/complex (complex<float>, complex<double>)
+ (complex<long double>): Define copy constructor as defaulted.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-09-07 Jonathan Wakely <jwakely@redhat.com>
+
+ * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for mkdir,
+ chmod, chdir, and getcwd.
+ * config.h.in: Regenerate.
+ * configure: Regenerate.
+ * src/c++17/fs_ops.cc (create_dir): Use USE_MKDIR macro.
+ (fs::current_path): Use USE_GETCWD and USE_CHDIR macros.
+ (fs::permissions): Use USE_CHMOD macro.
+ * src/filesystem/ops-common.h [FILESYSTEM_IS_WINDOWS]
+ (chmod, mkdir, getcwd, chdir): Define new macros.
+ [FILESYSTEM_IS_WINDOWS] (chmod, mkdir, getcwd, chdir): Use
+ new macros.
+ * src/filesystem/ops.cc (create_dir): Use USE_MKDIR macro.
+ (fs::current_path): Use USE_GETCWD and USE_CHDIR macros.
+ (fs::permissions): Use USE_CHMOD macro.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-09-15 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/111172
+ * include/std/variant (get<T>): Remove !is_void static
+ assertions.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-09-11 Jonathan Wakely <jwakely@redhat.com>
+
+ * src/c++11/debug.cc (acquire_sequence_ptr_for_lock): New
+ function.
+ (reset_sequence_ptr): New function.
+ (_Safe_iterator_base::_M_detach)
+ (_Safe_local_iterator_base::_M_detach): Replace bare atomic_load
+ with acquire_sequence_ptr_for_lock.
+ (_Safe_iterator_base::_M_reset): Replace bare atomic_store with
+ reset_sequence_ptr.
+
+2023-11-09 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-09-11 Jonathan Wakely <jwakely@redhat.com>
+
+ * src/c++11/Makefile.am: Add new file.
+ * src/c++11/Makefile.in: Regenerate.
+ * src/c++11/debug.cc (__glibcxx_assert_fail): Move to ...
+ * src/c++11/assert_fail.cc: New file.
+
2023-11-08 Jonathan Wakely <jwakely@redhat.com>
Backported from master: