libstdc++-v3/ChangeLog-2023 - gcc - Git at Google

 2023-12-31  Hans-Peter Nilsson  <hp@axis.com>

 	* testsuite/20_util/hash/quality.cc: Increase timeout by a factor 3.

 2023-12-31  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/hashtable.h: Move comment about all equivalent values
 	being next to each other in the class documentation header.
 	(_M_reinsert_node, _M_merge_unique): Implement small size optimization.
 	(_M_find_tr, _M_count_tr, _M_equal_range_tr): Likewise.

 2023-12-31  François Dumont  <fdumont@gcc.gnu.org>

 	* testsuite/performance/23_containers/insert/54075.cc: Add lookup on unknown entries
 	w/o copy to see potential impact of memory fragmentation enhancements.
 	* testsuite/performance/23_containers/insert/unordered_multiset_hint.cc: Enhance hash
 	functor to make it perfect, exactly 1 entry per bucket. Also use hash functor tagged as
 	slow or not to bench w/o hash code cache.
 	* testsuite/performance/23_containers/insert/unordered_set_hint.cc: New test case. Like
 	previous one but using std::unordered_set.
 	* testsuite/performance/23_containers/insert/unordered_set_range_insert.cc: New test case.
 	Check performance of range-insertion compared to individual insertions.
 	* testsuite/performance/23_containers/insert_erase/unordered_small_size.cc: Add same bench
 	but after a copy to demonstrate impact of enhancements regarding memory fragmentation.

 2023-12-22  Christophe Lyon  <christophe.lyon@linaro.org>

 	* Makefile.am: Allow overriding EXEPCT.
 	* Makefile.in: Regenerate.

 2023-12-21  Arsen Arsenović  <arsen@aarsen.me>

 	* include/Makefile.am: Install std/generator, bits/elements_of.h
 	as freestanding.
 	* include/Makefile.in: Regenerate.
 	* include/bits/version.def: Add __cpp_lib_generator.
 	* include/bits/version.h: Regenerate.
 	* include/precompiled/stdc++.h: Include <generator>.
 	* include/std/ranges: Include bits/elements_of.h
 	* include/bits/elements_of.h: New file.
 	* include/std/generator: New file.
 	* testsuite/24_iterators/range_generators/01.cc: New test.
 	* testsuite/24_iterators/range_generators/02.cc: New test.
 	* testsuite/24_iterators/range_generators/copy.cc: New test.
 	* testsuite/24_iterators/range_generators/except.cc: New test.
 	* testsuite/24_iterators/range_generators/synopsis.cc: New test.
 	* testsuite/24_iterators/range_generators/subrange.cc: New test.

 2023-12-21  Arsen Arsenović  <arsen@aarsen.me>

 	* include/bits/ranges_util.h: Add missing <bits/invoke.h>
 	include.

 2023-12-18  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/112802
 	PR libstdc++/113068
 	* include/std/ranges (__detail::_To::operator()): Add constraints.
 	(__detail::_To2::operator()): Likewise.
 	* testsuite/std/ranges/conv/1.cc (test_sfinae): New test.
 	(test_composition): New test.

 2023-12-16  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++23/print.cc (__open_terminal(FILE*)): Avoid fileno
 	macro.

 2023-12-16  H.J. Lu  <hjl.tools@gmail.com>

 	* config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
 	Updated.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (remove_pointer): Use __remove_pointer
 	built-in trait.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_object): Use __is_object built-in
 	trait.
 	(is_object_v): Likewise.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_function): Use __is_function
 	built-in trait.
 	(is_function_v): Likewise. Optimize its implementation.  Move
 	this under is_const_v as this depends on is_const_v.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_reference): Use __is_reference
 	built-in trait.
 	(is_reference_v): Likewise.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_member_object_pointer): Use
 	__is_member_object_pointer built-in trait.
 	(is_member_object_pointer_v): Likewise.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_member_function_pointer): Use
 	__is_member_function_pointer built-in trait.
 	(is_member_function_pointer_v): Likewise.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_member_pointer): Use
 	__is_member_pointer built-in trait.
 	(is_member_pointer_v): Likewise.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_scoped_enum): Use
 	__is_scoped_enum built-in trait.
 	(is_scoped_enum_v): Likewise.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_bounded_array_v): Use
 	__is_bounded_array built-in trait.

 2023-12-16  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (is_array): Use __is_array built-in
 	trait.
 	(is_array_v): Likewise.

 2023-12-15  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++23/print.cc (__write_to_terminal) [_WIN32]: If handle
 	does not refer to the console then just write to it using normal
 	file I/O.
 	* testsuite/27_io/print/2.cc (as_printed_to_terminal): Print
 	error message on failure.
 	(test_utf16_transcoding): Adjust for as_printed_to_terminal
 	modifying its argument.

 2023-12-15  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/ostream (vprint_unicode) [_WIN32]: Use RAII guard.
 	(vprint_unicode) [!_WIN32]: Just call vprint_nonunicode.
 	* include/std/print (vprint_unicode) [!_WIN32]: Likewise.

 2023-12-15  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/ostream (vprint_nonunicode, vprint_unicode): Do
 	not insert padding.
 	* testsuite/27_io/basic_ostream/print/1.cc: Adjust expected
 	behaviour.

 2023-12-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/107760
 	* include/Makefile.am: Add new header.
 	* include/Makefile.in: Regenerate.
 	* include/bits/version.def (__cpp_lib_print): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/format (__literal_encoding_is_utf8): New function.
 	(_Seq_sink::view()): New member function.
 	* include/std/ostream (vprintf_nonunicode, vprintf_unicode)
 	(print, println): New functions.
 	* include/std/print: New file.
 	* src/c++23/Makefile.am: Add new source file.
 	* src/c++23/Makefile.in: Regenerate.
 	* src/c++23/print.cc: New file.
 	* testsuite/27_io/basic_ostream/print/1.cc: New test.
 	* testsuite/27_io/print/1.cc: New test.
 	* testsuite/27_io/print/2.cc: New test.

 2023-12-14  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_CHECK_FILEBUF_NATIVE_HANDLES): Add
 	missing header to configure test. Check correct variable.
 	* config/io/basic_file_stdio.cc (__basic_file<char>::native_handle):
 	Fix typo.
 	* configure: Regenerate.
 	* testsuite/27_io/basic_filebuf/native_handle/char/1.cc: Do not
 	call CloseHandle on the native handle.
 	* testsuite/27_io/basic_filebuf/native_handle/wchar_t/1.cc:
 	Likewise.

 2023-12-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (_Seq_sink): Fix missing argument in
 	discarded statement. Add comments, likely/unlikely attributes
 	and debug assertions as sanity checks.

 2023-12-14  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/objects/char/2.cc: Use dg-output.
 	* testsuite/27_io/objects/wchar_t/2.cc: Use dg-output.

 2023-12-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (__formatter_chrono::_M_S): Fix order
 	of arguments to std::format_to.
 	* testsuite/20_util/duration/io.cc: Test subsecond duration with
 	floating-point rep.

 2023-12-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109536
 	* include/bits/c++config (__glibcxx_constexpr_assert): Remove
 	macro.
 	* include/bits/stl_algobase.h (__niter_base, __copy_move_a)
 	(__copy_move_backward_a, __fill_a, __fill_n_a, __equal_aux)
 	(__lexicographical_compare_aux): Add constexpr to overloads for
 	debug mode iterators.
 	* include/debug/helper_functions.h (__unsafe): Add constexpr.
 	* include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_COND_AT): Remove
 	macro, folding it into ...
 	(_GLIBCXX_DEBUG_VERIFY_AT_F): ... here. Do not use
 	__glibcxx_constexpr_assert.
 	* include/debug/safe_base.h (_Safe_iterator_base): Add constexpr
 	to some member functions. Omit attaching, detaching and checking
 	operations during constant evaluation.
 	* include/debug/safe_container.h (_Safe_container): Likewise.
 	* include/debug/safe_iterator.h (_Safe_iterator): Likewise.
 	* include/debug/safe_iterator.tcc (__niter_base, __copy_move_a)
 	(__copy_move_backward_a, __fill_a, __fill_n_a, __equal_aux)
 	(__lexicographical_compare_aux): Add constexpr.
 	* include/debug/vector (_Safe_vector, vector): Add constexpr.
 	Omit safe iterator operations during constant evaluation.
 	* testsuite/23_containers/vector/bool/capacity/constexpr.cc:
 	Remove dg-xfail-if for debug mode.
 	* testsuite/23_containers/vector/bool/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/vector/bool/cons/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/element_access/1.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/element_access/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/modifiers/assign/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/modifiers/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/modifiers/swap/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/capacity/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/vector/cons/constexpr.cc: Likewise.
 	* testsuite/23_containers/vector/data_access/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/element_access/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/modifiers/assign/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/modifiers/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/modifiers/swap/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
 	Adjust dg-error line number.

 2023-12-13  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (__formatter_chrono::_M_C_y_Y): Do
 	not round century down for %Y formats.

 2023-12-12  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (__do_vformat_to): Handle char separately
 	from other integral types.
 	* testsuite/std/format/functions/format.cc: Check for expected
 	output for char and bool arguments.
 	* testsuite/std/format/string.cc: Check that 0 filling is
 	rejected for character and string formats.

 2023-12-12  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (__formatter_chrono::_M_C_y_Y): Fix
 	rounding for negative centuries.
 	* testsuite/std/time/year/io.cc: Check %C for negative years.

 2023-12-12  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++11/Makefile.am: Remove redundant -std=gnu++11 flags.
 	* src/c++11/Makefile.in: Regenerate.

 2023-12-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111826
 	* include/bits/version.def (format): Update value.
 	* include/bits/version.h: Regenerate.
 	* testsuite/std/format/functions/format.cc:

 2023-12-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112876
 	* include/std/ranges (ranges::to): Do not try to use an iterator
 	returned by the container's emplace or insert member functions.
 	* testsuite/std/ranges/conv/1.cc (Cont4::emplace, Cont4::insert):
 	Use the iterator parameter. Do not return an iterator.

 2023-12-07  Patrick Palka  <ppalka@redhat.com>

 	* include/std/ranges (__detail::_ToClosure): Replace with ...
 	(__detail::_To): ... this.
 	(__detail::_ToClosure2): Replace with ...
 	(__detail::To2): ... this.
 	(to): Simplify using the existing _Partial range adaptor
 	closure object.

 2023-12-07  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (_Iter_sink<charT, contiguous_iterator>):
 	Remove uint64_t local type.

 2023-12-07  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/atomic_wait.h: Include <cstdint> instead of
 	<stdint.h>.

 2023-12-07  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112882
 	* include/bits/c++config (__is_constant_evaluated): Add
 	always_inline attribute.
 	(_GLIBCXX_DO_ASSERT): Remove macro.
 	(__glibcxx_assert): Define separately for assertions-enabled and
 	constexpr-only cases.

 2023-12-07  Alexandre Oliva  <oliva@adacore.com>

 	PR libstdc++/112858
 	* config/os/gnu-linux/os_defines.h
 	(_GLIBCXX_MAY_HAVE___CXA_THREAD_ATEXIT_IMPL): Define.
 	* libsupc++/atexit_thread.cc [__GXX_WEAK__ &&
 	_GLIBCXX_MAY_HAVE___CXA_THREAD_ATEXIT_IMPL]
 	(__cxa_thread_atexit): Add dynamic detection of
 	__cxa_thread_atexit_impl.

 2023-12-06  Jason Merrill  <jason@redhat.com>

 	DR 532
 	PR c++/53499
 	* testsuite/23_containers/vector/ext_pointer/types/1.cc
 	* testsuite/23_containers/vector/ext_pointer/types/2.cc
 	(N::operator-): Make less specialized.

 2023-12-06  Alexandre Oliva  <oliva@gnu.org>

 	Revert:
 	2023-12-02  Alexandre Oliva  <oliva@adacore.com>

 	* libsupc++/atexit_thread.cc [__GXX_WEAK__]: Add dynamic
 	detection of __cxa_thread_atexit_impl.

 2023-12-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111948
 	* include/bits/ranges_util.h (subrange): Add constructor to
 	_Size to aoid setting member in constructor.
 	* testsuite/std/ranges/subrange/111948.cc: New test.

 2023-12-05  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/ranges (__detail::__container_insertable): Remove.
 	(__detail::__container_inserter): Remove.
 	(ranges::to): Use emplace_back or emplace, as per LWG 4016.
 	* testsuite/std/ranges/conv/1.cc (Cont4, test_2_1_4): Check for
 	use of emplace_back and emplace.

 2023-12-05  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/c++config (__glibcxx_assert_fail): Declare even
 	when assertions are not enabled.
 	(__glibcxx_constexpr_assert): Remove macro.
 	(__glibcxx_assert_impl): Remove macro.
 	(_GLIBCXX_ASSERT_FAIL): New macro.
 	(_GLIBCXX_DO_ASSERT): New macro.
 	(__glibcxx_assert): Simplify to a single definition that works
 	at runtime and during constant evaluation.
 	* testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
 	Adjust expected errors.
 	* testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/modifiers/remove_prefix/debug.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/modifiers/remove_suffix/debug.cc:
 	Likewise.
 	* testsuite/23_containers/span/back_neg.cc: Likewise.
 	* testsuite/23_containers/span/front_neg.cc: Likewise.
 	* testsuite/23_containers/span/index_op_neg.cc: Likewise.
 	* testsuite/26_numerics/lcm/105844.cc: Likewise.

 2023-12-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112832
 	* include/std/format (formatter::set_debug_format): Ensure this
 	member is defined conditionally for all specializations.
 	* testsuite/std/format/formatter/112832.cc: New test.

 2023-12-05  Will Hawkins  <hawkinsw@obs.cr>
 	    Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/smartptr.adapt/inout_ptr/2.cc: Add check
 	for LWG Issue 3897.

 2023-12-05  Marek Polacek  <polacek@redhat.com>

 	PR c++/107687
 	PR c++/110997
 	* testsuite/18_support/comparisons/categories/zero_neg.cc: Add
 	dg-prune-output.
 	* testsuite/std/format/string_neg.cc: Add dg-error.

 2023-12-02  Alexandre Oliva  <oliva@adacore.com>

 	* libsupc++/atexit_thread.cc [__GXX_WEAK__]: Add dynamic
 	detection of __cxa_thread_atexit_impl.

 2023-12-01  Jason Merrill  <jason@redhat.com>

 	* include/std/bit: Avoid builtins in requires-clauses.
 	* include/std/variant: Likewise.

 2023-12-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

 	* configure: Regenerate.

 2023-11-30  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/ranges (__detail::__toable): Fix incorrect use of
 	_Range instead of _Cont.
 	(__detail::_ToClosure, __detail::_ToClosure2): Add missing
 	constexpr specifier on constructors.
 	* testsuite/std/ranges/conv/1.cc (_Cont, _Cont2, _Cont3): Remove
 	unnecessary begin() and end() members.
 	(test_constexpr): New function to check range adaptors are
 	usable in constant expressions.

 2023-11-29  Thomas Schwinge  <thomas@codesourcery.com>

 	* testsuite/23_containers/span/at.cc: Fix for '-fno-exceptions'
 	configurations.

 2023-11-28  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/atomic_wait.h: Include <stdint.h>.

 2023-11-28  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/stl_uninitialized.h: Fix typo in comment.

 2023-11-24  Jan Hubicka  <jh@suse.cz>

 	PR middle-end/109849
 	* include/bits/stl_uninitialized.h (__relocate_a_1): Use memcpy instead
 	of memmove.

 2023-11-23  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111055
 	* include/bits/ranges_base.h (from_range_t): Define new tag
 	type.
 	(from_range): Define new tag object.
 	* include/bits/version.def (ranges_to_container): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/ranges (ranges::to): Define.
 	* testsuite/std/ranges/conv/1.cc: New test.
 	* testsuite/std/ranges/conv/2_neg.cc: New test.
 	* testsuite/std/ranges/conv/version.cc: New test.

 2023-11-23  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/util/testsuite_allocator.h (uneq_allocator): Fix
 	equality operator for heterogeneous comparisons.

 2023-11-21  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (freestanding_cstring): Add.
 	* include/bits/version.h: Regenerate.
 	* include/c_compatibility/string.h (strtok): Do not declare for
 	C++26 freestanding.
 	* include/c_global/cstring (strtok): Likewise.
 	* testsuite/21_strings/headers/cstring/version.cc: New test.

 2023-11-21  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (freestanding_algorithm)
 	(freestanding_array, freestanding_optional)
 	(freestanding_string_view, freestanding_variant): Add.
 	* include/bits/version.h: Regenerate.
 	* include/std/algorithm (__glibcxx_want_freestanding_algorithm):
 	Define.
 	* include/std/array (__glibcxx_want_freestanding_array):
 	Define.
 	* include/std/optional (__glibcxx_want_freestanding_optional):
 	Define.
 	* include/std/string_view
 	(__glibcxx_want_freestanding_string_view): Define.
 	* include/std/variant (__glibcxx_want_freestanding_variant):
 	Define.
 	* testsuite/20_util/optional/version.cc: Add checks for
 	__cpp_lib_freestanding_optional.
 	* testsuite/20_util/variant/version.cc: Add checks for
 	__cpp_lib_freestanding_variant.
 	* testsuite/23_containers/array/tuple_interface/get_neg.cc:
 	Adjust dg-error line numbers.
 	* testsuite/21_strings/basic_string_view/requirements/version.cc:
 	New test.
 	* testsuite/23_containers/array/requirements/version.cc: New
 	test.
 	* testsuite/25_algorithms/fill_n/requirements/version.cc: New
 	test.
 	* testsuite/25_algorithms/swap_ranges/requirements/version.cc:
 	New test.

 2023-11-21  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (freestanding_expected): New macro.
 	(span): Add C++26 value.
 	* include/bits/version.h: Regenerate.
 	* include/std/expected (__glibcxx_want_freestanding_expected):
 	Define.
 	* include/std/span (span::at): New member function.
 	* testsuite/20_util/expected/version.cc: Add checks for
 	__cpp_lib_freestanding_expected.
 	* testsuite/23_containers/span/2.cc: Moved to...
 	* testsuite/23_containers/span/version.cc: ...here. Add checks
 	for __cpp_lib_span in <span> as well as in <version>.
 	* testsuite/23_containers/span/1.cc: Removed.
 	* testsuite/23_containers/span/at.cc: New test.

 2023-11-21  Jonathan Wakely  <jwakely@redhat.com>

 	* include/tr2/dynamic_bitset (dynamic_bitset): Pass zero and one
 	characters to _M_copy_from_string.
 	* testsuite/tr2/dynamic_bitset/string.cc: New test.

 2023-11-21  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/html/*: Regenerate.
 	* doc/xml/faq.xml: Remove reference to buildstat.html pages.
 	* doc/xml/manual/test.xml: Likewise

 2023-11-21  Jan Hubicka  <jh@suse.cz>

 	PR libstdc++/110287
 	PR middle-end/109811
 	PR middle-end/109849
 	* include/bits/stl_vector.h (_M_realloc_append): New member function.
 	(push_back): Use it.
 	* include/bits/vector.tcc: (emplace_back): Use it.
 	(_M_realloc_insert): Let compiler know that new vector size is non-zero.
 	(_M_realloc_append): New member function.

 2023-11-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112607
 	* include/std/format (basic_format_arg::_S_to_arg_type): Check
 	value_type for basic_string_view and basic_string
 	specializations.
 	* testsuite/std/format/arguments/112607.cc: New test.

 2023-11-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110801
 	* include/std/format (_Sink_iter::_M_reserve): New member
 	function.
 	(_Sink::_Reservation): New nested class.
 	(_Sink::_M_reserve, _Sink::_M_bump): New virtual functions.
 	(_Seq_sink::_M_reserve, _Seq_sink::_M_bump): New virtual
 	overrides.
 	(_Iter_sink<O, ContigIter>::_M_reserve): Likewise.
 	(__do_vformat_to): Use new functions to optimize "{}" case.

 2023-11-17  Jonathan Wakely  <jwakely@redhat.com>

 	* config.h.in: Regenerate.

 2023-11-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/Makefile.am: Add new header.
 	* include/Makefile.in: Regenerate.
 	* include/bits/version.def (saturation_arithmetic): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/numeric: Include new header.
 	* include/bits/sat_arith.h: New file.
 	* testsuite/26_numerics/saturation/add.cc: New test.
 	* testsuite/26_numerics/saturation/cast.cc: New test.
 	* testsuite/26_numerics/saturation/div.cc: New test.
 	* testsuite/26_numerics/saturation/mul.cc: New test.
 	* testsuite/26_numerics/saturation/sub.cc: New test.
 	* testsuite/26_numerics/saturation/version.cc: New test.

 2023-11-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/utility (in_range): Rename _Up parameter to _Res.

 2023-11-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/out_ptr.h: Add Doxygen comments. Remove a
 	redundant preprocessor condition.
 	* testsuite/20_util/smartptr.adapt/version.cc: New test.

 2023-11-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h: Fix Doxygen markup.

 2023-11-16  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112564
 	* include/std/stacktrace (formatter::format): Format according
 	to format-spec.
 	* include/std/thread (formatter::format): Use _Align_right as
 	default.
 	* testsuite/19_diagnostics/stacktrace/output.cc: Check
 	fill-and-align handling. Change compile test to run.
 	* testsuite/30_threads/thread/id/output.cc: Check fill-and-align
 	handling.

 2023-11-16  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111667
 	* include/Makefile.am: Add new header.
 	* include/Makefile.in: Regenerate.
 	* include/bits/out_ptr.h: New file.
 	* include/bits/shared_ptr.h (__is_shared_ptr): Move definition
 	to here ...
 	* include/bits/shared_ptr_atomic.h (__is_shared_ptr): ... from
 	here.
 	* include/bits/shared_ptr_base.h (__shared_count): Declare
 	out_ptr_t as a friend.
 	(_Sp_counted_deleter, __shared_ptr): Likewise.
 	* include/bits/unique_ptr.h (unique_ptr, unique_ptr<T[], D>):
 	Declare out_ptr_t and inout_ptr_t as friends.
 	(__is_unique_ptr): Define new variable template.
 	* include/bits/version.def (out_ptr): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/memory: Include new header.
 	* testsuite/20_util/smartptr.adapt/inout_ptr/1.cc: New test.
 	* testsuite/20_util/smartptr.adapt/inout_ptr/2.cc: New test.
 	* testsuite/20_util/smartptr.adapt/inout_ptr/shared_ptr_neg.cc:
 	New test.
 	* testsuite/20_util/smartptr.adapt/inout_ptr/void_ptr.cc: New
 	test.
 	* testsuite/20_util/smartptr.adapt/out_ptr/1.cc: New test.
 	* testsuite/20_util/smartptr.adapt/out_ptr/2.cc: New test.
 	* testsuite/20_util/smartptr.adapt/out_ptr/shared_ptr_neg.cc:
 	New test.
 	* testsuite/20_util/smartptr.adapt/out_ptr/void_ptr.cc: New
 	test.

 2023-11-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/algorithmfwd.h: Do not define standard feature
 	test macro here.
 	* include/bits/align.h: Likewise. Test internal macros instead
 	of standard macros.
 	* include/bits/alloc_traits.h: Likewise.
 	* include/bits/allocator.h: Likewise.
 	* include/bits/atomic_base.h: Likewise.
 	* include/bits/atomic_timed_wait.h: Likewise.
 	* include/bits/atomic_wait.h: Likewise.
 	* include/bits/basic_string.h: Likewise.
 	* include/bits/basic_string.tcc: Likewise.
 	* include/bits/char_traits.h: Likewise.
 	* include/bits/chrono.h: Likewise.
 	* include/bits/cow_string.h: Likewise.
 	* include/bits/forward_list.h: Likewise.
 	* include/bits/hashtable.h: Likewise.
 	* include/bits/ios_base.h: Likewise.
 	* include/bits/memory_resource.h: Likewise.
 	* include/bits/move.h: Likewise.
 	* include/bits/move_only_function.h: Likewise.
 	* include/bits/node_handle.h: Likewise.
 	* include/bits/ptr_traits.h: Likewise.
 	* include/bits/range_access.h: Likewise.
 	* include/bits/ranges_algo.h: Likewise.
 	* include/bits/ranges_cmp.h: Likewise.
 	* include/bits/ranges_util.h: Likewise.
 	* include/bits/semaphore_base.h: Likewise.
 	* include/bits/shared_ptr.h: Likewise.
 	* include/bits/shared_ptr_atomic.h: Likewise.
 	* include/bits/shared_ptr_base.h: Likewise.
 	* include/bits/stl_algo.h: Likewise.
 	* include/bits/stl_algobase.h: Likewise.
 	* include/bits/stl_function.h: Likewise.
 	* include/bits/stl_iterator.h: Likewise.
 	* include/bits/stl_list.h: Likewise.
 	* include/bits/stl_map.h: Likewise.
 	* include/bits/stl_pair.h: Likewise.
 	* include/bits/stl_queue.h: Likewise.
 	* include/bits/stl_stack.h: Likewise.
 	* include/bits/stl_tree.h: Likewise.
 	* include/bits/stl_uninitialized.h: Likewise.
 	* include/bits/stl_vector.h: Likewise.
 	* include/bits/unique_ptr.h: Likewise.
 	* include/bits/unordered_map.h: Likewise.
 	* include/bits/uses_allocator_args.h: Likewise.
 	* include/bits/utility.h: Likewise.
 	* include/bits/erase_if.h: Add comment.
 	* include/std/algorithm: Define standard feature test macros
 	here.
 	* include/std/atomic: Likewise.
 	* include/std/array: Likewise.
 	* include/std/chrono: Likewise.
 	* include/std/condition_variable: Likewise.
 	* include/std/deque: Likewise.
 	* include/std/format: Likewise.
 	* include/std/functional: Likewise.
 	* include/std/forward_list: Likewise.
 	* include/std/ios: Likewise.
 	* include/std/iterator: Likewise.
 	* include/std/list: Likewise.
 	* include/std/map: Likewise.
 	* include/std/memory: Likewise.
 	* include/std/numeric: Likewise.
 	* include/std/queue: Likewise.
 	* include/std/ranges: Likewise.
 	* include/std/regex: Likewise.
 	* include/std/set: Likewise.
 	* include/std/stack: Likewise.
 	* include/std/stop_token: Likewise.
 	* include/std/string: Likewise.
 	* include/std/string_view:
 	* include/std/tuple: Likewise.
 	* include/std/unordered_map:
 	* include/std/unordered_set:
 	* include/std/utility: Likewise.
 	* include/std/vector: Likewise.
 	* include/std/scoped_allocator: Query internal macros instead of
 	standard macros.

 2023-11-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/byte/requirements.cc: Disable PCH.
 	* testsuite/18_support/destroying_delete.cc: Likewise.
 	* testsuite/18_support/source_location/1.cc: Likewise.
 	* testsuite/18_support/source_location/version.cc: Likewise.
 	* testsuite/18_support/type_info/constexpr.cc: Likewise.
 	* testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
 	Likewise.
 	* testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/synopsis.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/version.cc: Likewise.
 	* testsuite/20_util/addressof/requirements/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/allocator_traits/header-2.cc: Likewise.
 	* testsuite/20_util/allocator_traits/header.cc: Likewise.
 	* testsuite/20_util/as_const/1.cc: Likewise. Likewise.
 	* testsuite/20_util/bitset/cons/constexpr_c++23.cc: Likewise.
 	* testsuite/20_util/bitset/version.cc: Likewise.
 	* testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
 	Likewise.
 	* testsuite/20_util/duration_cast/rounding.cc: Likewise.
 	* testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
 	Likewise.
 	* testsuite/20_util/exchange/constexpr.cc: Likewise.
 	* testsuite/20_util/expected/synopsis.cc: Likewise.
 	* testsuite/20_util/expected/version.cc: Likewise.
 	* testsuite/20_util/function_objects/bind_front/1.cc: Likewise.
 	* testsuite/20_util/function_objects/bind_front/2.cc: Likewise.
 	* testsuite/20_util/function_objects/invoke/3.cc: Likewise.
 	* testsuite/20_util/function_objects/invoke/4.cc: Likewise.
 	* testsuite/20_util/function_objects/invoke/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/invoke/version.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/searchers.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/1.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/2.cc: Likewise.
 	* testsuite/20_util/is_bounded_array/value.cc: Likewise.
 	* testsuite/20_util/is_layout_compatible/value.cc: Likewise.
 	* testsuite/20_util/is_layout_compatible/version.cc: Likewise.
 	* testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
 	* testsuite/20_util/is_nothrow_swappable/value.h: Likewise.
 	* testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
 	Remove redundant checks already tested elsewhere.
 	* testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/is_nothrow_swappable_with/value.cc: Disable
 	PCH.
 	* testsuite/20_util/is_pointer_interconvertible/value.cc:
 	Likewise.
 	* testsuite/20_util/is_pointer_interconvertible/version.cc:
 	Likewise.
 	* testsuite/20_util/is_scoped_enum/value.cc: Likewise.
 	* testsuite/20_util/is_scoped_enum/version.cc: Likewise.
 	* testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
 	Remove redundant checks already tested elsewhere.
 	* testsuite/20_util/is_swappable/requirements/typedefs.cc:
 	Remove redundant checks already tested elsewhere.
 	* testsuite/20_util/is_swappable/value.cc: Disable PCH.
 	* testsuite/20_util/is_swappable/value.h: Reorder headers.
 	* testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
 	Remove redundant checks already tested elsewhere.
 	* testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
 	Remove redundant checks already tested elsewhere.
 	* testsuite/20_util/is_swappable_with/value.cc: Disable PCH.
 	* testsuite/20_util/is_unbounded_array/value.cc: Likewise.
 	* testsuite/20_util/move_only_function/cons.cc: Likewise.
 	* testsuite/20_util/move_only_function/version.cc: Likewise.
 	* testsuite/20_util/optional/monadic/and_then.cc: Likewise.
 	* testsuite/20_util/optional/requirements.cc: Likewise.
 	* testsuite/20_util/optional/version.cc: Likewise.
 	* testsuite/20_util/owner_less/void.cc: Likewise.
 	* testsuite/20_util/reference_from_temporary/value.cc: Likewise.
 	* testsuite/20_util/reference_from_temporary/version.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/creation/array.cc: Likewise.
 	* testsuite/20_util/shared_ptr/creation/overwrite.cc: Likewise.
 	* testsuite/20_util/shared_ptr/creation/version.cc: Likewise.
 	* testsuite/20_util/time_point_cast/rounding.cc: Likewise.
 	* testsuite/20_util/to_chars/constexpr.cc: Likewise.
 	* testsuite/20_util/to_chars/result.cc: Likewise.
 	* testsuite/20_util/to_chars/version.cc: Likewise.
 	* testsuite/20_util/to_underlying/1.cc: Likewise.
 	* testsuite/20_util/to_underlying/version.cc: Likewise.
 	* testsuite/20_util/tuple/apply/1.cc: Likewise.
 	* testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc:
 	Likewise.
 	* testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
 	* testsuite/20_util/tuple/p2321r2.cc: Likewise.
 	* testsuite/20_util/tuple/tuple_element_t.cc: Likewise.
 	* testsuite/20_util/unique_ptr/cons/constexpr_c++20.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/creation/for_overwrite.cc:
 	Likewise.
 	* testsuite/20_util/unreachable/1.cc: Likewise.
 	* testsuite/20_util/unreachable/version.cc: Likewise.
 	* testsuite/20_util/unwrap_reference/1.cc: Likewise.
 	* testsuite/20_util/unwrap_reference/3.cc: Likewise.
 	* testsuite/20_util/variant/constexpr.cc: Likewise.
 	* testsuite/20_util/variant/version.cc: Likewise.
 	* testsuite/20_util/variant/visit_inherited.cc: Likewise.
 	* testsuite/20_util/void_t/1.cc: Likewise.
 	* testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/cons/char/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/cons/wchar_t/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/erasure.cc: Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/to_string_float.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/version.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/version.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/operations/contains/char.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/contains/char/2.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/copy/char/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
 	Likewise.
 	* testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 	Likewise.
 	* testsuite/21_strings/char_traits/requirements/version.cc:
 	Likewise.
 	* testsuite/23_containers/array/comparison_operators/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/array/creation/1.cc: Likewise.
 	* testsuite/23_containers/array/creation/2.cc: Likewise.
 	* testsuite/23_containers/array/element_access/constexpr_c++17.cc:
 	Likewise.
 	* testsuite/23_containers/array/requirements/constexpr_fill.cc:
 	Likewise.
 	* testsuite/23_containers/array/requirements/constexpr_iter.cc:
 	Likewise.
 	* testsuite/23_containers/deque/erasure.cc: Likewise.
 	* testsuite/23_containers/forward_list/erasure.cc: Likewise.
 	* testsuite/23_containers/list/erasure.cc: Likewise.
 	* testsuite/23_containers/map/erasure.cc: Likewise.
 	* testsuite/23_containers/queue/cons_from_iters.cc: Likewise.
 	* testsuite/23_containers/set/erasure.cc: Likewise.
 	* testsuite/23_containers/span/1.cc: Likewise.
 	* testsuite/23_containers/span/2.cc: Likewise.
 	* testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
 	* testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 	* testsuite/23_containers/unordered_map/operations/1.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_set/erasure.cc: Likewise.
 	* testsuite/23_containers/unordered_set/operations/1.cc:
 	Likewise.
 	* testsuite/23_containers/vector/cons/constexpr.cc: Likewise.
 	* testsuite/23_containers/vector/erasure.cc: Likewise.
 	* testsuite/23_containers/vector/requirements/version.cc:
 	Likewise.
 	* testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
 	Remove redundant checks already tested elsewhere.
 	* testsuite/25_algorithms/constexpr_macro.cc: Likewise.
 	* testsuite/25_algorithms/cpp_lib_constexpr.cc: Likewise.
 	* testsuite/25_algorithms/fold_left/1.cc: Likewise.
 	* testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
 	* testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
 	* testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
 	* testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
 	* testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.byteswap/byteswap.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.byteswap/version.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.cast/bit_cast.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.cast/version.cc: Likewise.
 	* testsuite/26_numerics/bit/header-2.cc: Likewise.
 	* testsuite/26_numerics/bit/header.cc: Likewise.
 	* testsuite/26_numerics/complex/1.cc: Likewise.
 	* testsuite/26_numerics/complex/2.cc: Likewise.
 	* testsuite/26_numerics/endian/2.cc: Likewise.
 	* testsuite/26_numerics/endian/3.cc: Likewise.
 	* testsuite/26_numerics/gcd/1.cc: Likewise.
 	* testsuite/26_numerics/lcm/1.cc: Likewise.
 	* testsuite/26_numerics/lerp/1.cc: Likewise.
 	* testsuite/26_numerics/lerp/version.cc: Likewise.
 	* testsuite/26_numerics/midpoint/integral.cc: Likewise.
 	* testsuite/26_numerics/midpoint/version.cc: Likewise.
 	* testsuite/26_numerics/numbers/1.cc: Likewise.
 	* testsuite/26_numerics/numbers/2.cc: Likewise.
 	* testsuite/27_io/basic_filebuf/native_handle/char/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_filebuf/native_handle/version.cc:
 	Likewise.
 	* testsuite/27_io/basic_ofstream/open/char/noreplace.cc:
 	Likewise.
 	* testsuite/27_io/basic_ofstream/open/wchar_t/noreplace.cc:
 	Likewise.
 	* testsuite/27_io/basic_syncbuf/1.cc: Likewise.
 	* testsuite/27_io/basic_syncbuf/2.cc: Likewise.
 	* testsuite/27_io/basic_syncstream/1.cc: Likewise.
 	* testsuite/27_io/basic_syncstream/2.cc: Likewise.
 	* testsuite/27_io/spanstream/1.cc: Likewise.
 	* testsuite/27_io/spanstream/version.cc: Likewise.
 	* testsuite/29_atomics/atomic/cons/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic/lock_free_aliases.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/1.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/2.cc: Likewise.
 	* testsuite/29_atomics/headers/stdatomic.h/c_compat.cc:
 	Likewise.
 	* testsuite/29_atomics/headers/stdatomic.h/version.cc: Likewise.
 	* testsuite/30_threads/barrier/1.cc: Likewise.
 	* testsuite/30_threads/barrier/2.cc: Likewise.
 	* testsuite/30_threads/condition_variable_any/stop_token/1.cc:
 	Likewise.
 	* testsuite/30_threads/condition_variable_any/stop_token/2.cc:
 	Likewise.
 	* testsuite/30_threads/jthread/1.cc: Likewise.
 	* testsuite/30_threads/jthread/version.cc: Likewise.
 	* testsuite/30_threads/latch/1.cc: Likewise.
 	* testsuite/30_threads/latch/2.cc: Likewise.
 	* testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/30_threads/semaphore/1.cc: Likewise.
 	* testsuite/30_threads/semaphore/2.cc: Likewise.
 	* testsuite/30_threads/stop_token/1.cc: Likewise.
 	* testsuite/30_threads/stop_token/2.cc: Likewise.
 	* testsuite/experimental/feat-char8_t.cc: Likewise.
 	* testsuite/experimental/iterator/ostream_joiner.cc: Likewise.
 	* testsuite/experimental/numeric/gcd.cc: Likewise.
 	* testsuite/experimental/scopeguard/uniqueres.cc: Likewise.
 	* testsuite/std/concepts/1.cc: Likewise.
 	* testsuite/std/concepts/2.cc: Likewise.
 	* testsuite/std/ranges/adaptors/as_const/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/as_rvalue/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/chunk/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/chunk_by/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/enumerate/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/join_with/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/slide/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/stride/1.cc: Likewise.
 	* testsuite/std/ranges/cartesian_product/1.cc: Likewise.
 	* testsuite/std/ranges/headers/ranges/synopsis.cc: Likewise.
 	* testsuite/std/ranges/repeat/1.cc: Likewise.
 	* testsuite/std/ranges/version_c++23.cc: Likewise.
 	* testsuite/std/ranges/zip/1.cc: Likewise.
 	* testsuite/std/time/syn_c++20.cc: Likewise.
 	* testsuite/experimental/feat-cxx14.cc: Likewise. Include
 	<algorithm> and <iterator>.
 	* testsuite/23_containers/array/tuple_interface/get_neg.cc:
 	Adjust dg-error line numbers.

 2023-11-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (stds): Use >= 202100 for C++23
 	condition.
 	* include/bits/version.h: Regenerate.
 	* include/std/thread: Use > C++20 instead of >= C++23 for
 	__cplusplus condition.

 2023-11-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/istream (__rvalue_stream_extraction_t): Test
 	__cpp_concepts instead of __cpp_lib_concepts.
 	* include/std/ostream (__derived_from_ios_base): Likewise.
 	(__rvalue_stream_insertion_t): Likewise.

 2023-11-15  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112491
 	* python/libstdcxx/v6/xmethods.py (DequeWorkerBase.index):
 	Correctly handle unused capacity at the start of the first node.
 	* testsuite/libstdc++-xmethods/deque.cc: Check index operator
 	when elements have been removed from the front.

 2023-11-15  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/stacktrace (basic_stacktrace::at): Fix class name
 	in exception message.
 	* testsuite/19_diagnostics/stacktrace/hash.cc: Do not fail if
 	current() returns a non-empty stacktrace.

 2023-11-15  Alexandre Oliva  <oliva@gnu.org>

 	Revert:
 	2023-11-15  Alexandre Oliva  <oliva@adacore.com>

 	* include/bits/stl_bvector.h (_GLIBCXX_ALWAYS_INLINE): Undef.

 2023-11-15  Alexandre Oliva  <oliva@adacore.com>

 	* include/bits/stl_bvector.h (_GLIBCXX_ALWAYS_INLINE): Undef.

 2023-11-14  Cassio Neri  <cassio.neri@gmail.com>

 	* include/std/chrono (operator-(const weekday&, const weekday&)):
 	Optimize.

 2023-11-14  Cassio Neri  <cassio.neri@gmail.com>

 	* include/std/chrono (weekday::_S_from_days): Fix UB.
 	* testsuite/std/time/weekday/1.cc: Add test for overflow.

 2023-11-14  Cassio Neri  <cassio.neri@gmail.com>

 	* include/std/chrono (year::is_leap): Clear code.

 2023-11-14  Cassio Neri  <cassio.neri@gmail.com>

 	* include/std/chrono (year_month_day_last::day): Remove &1.

 2023-11-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/charconv (__from_chars_pow2_base): Convert base to
 	unsigned for call to __countr_zero.
 	(__from_chars_alnum): Likewise for call to __bit_width.

 2023-11-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112348
 	* include/std/stacktrace (hash<basic_stacktrace<Alloc>>): Fix
 	type of hash functio nfor entries.
 	* testsuite/19_diagnostics/stacktrace/hash.cc: New test.

 2023-11-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112491
 	* python/libstdcxx/v6/xmethods.py (DequeWorkerBase.size): Fix
 	calculation to use _M_start._M_cur.
 	* testsuite/libstdc++-xmethods/deque.cc: Check failing cases.

 2023-11-13  Arsen Arsenović  <arsen@aarsen.me>

 	* configure: Regenerate.

 2023-11-13  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/time/clock/file/io.cc: Double timeout using
 	dg-timeout-factor.
 	* testsuite/std/time/clock/gps/io.cc: Likewise.
 	* testsuite/std/time/clock/local/io.cc: Likewise.
 	* testsuite/std/time/clock/system/io.cc: Likewise.
 	* testsuite/std/time/clock/tai/io.cc: Likewise.
 	* testsuite/std/time/clock/utc/io.cc: Likewise.

 2023-11-13  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112480
 	* include/std/optional (_Optional_payload_base::_M_reset): Set
 	_M_engaged to false unconditionally.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112467
 	* include/bits/stl_bvector.h (_M_assume_normalized): Do not use
 	statement form of assume attribute for Clang.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/string_view (operator==, operator<=>): Remove
 	redundant overloads (LWG 3950).

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/26_numerics/headers/complex.h/std_c++11.h: Moved to...
 	* testsuite/26_numerics/headers/complex.h/std_c++11.cc: ...here.
 	* testsuite/26_numerics/headers/complex.h/std_c++98.h: Moved to...
 	* testsuite/26_numerics/headers/complex.h/std_c++98.cc: ...here.
 	Check macro first and then #undef.
 	* testsuite/26_numerics/headers/complex.h/std_gnu++11.h: Moved to...
 	* testsuite/26_numerics/headers/complex.h/std_gnu++11.cc: ...here.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112473
 	* include/bits/utility.h (integer_sequence): Add static_assert.
 	* testsuite/20_util/integer_sequence/112473.cc: New test.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/pair/dangling_ref.cc: Add hosted effective
 	target for specifiers using c++17_down.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/shared_ptr_atomic.h (atomic_is_lock_free)
 	(atomic_load_explicit, atomic_load, atomic_store_explicit)
 	(atomic_store, atomic_exchange_explicit, atomic_exchange)
 	(atomic_compare_exchange_strong, atomic_compare_exchange_weak)
 	(atomic_compare_exchange_strong_explicit)
 	(atomic_compare_exchange_weak_explicit): Add deprecated
 	attribute for C++20 and later.
 	* testsuite/20_util/shared_ptr/atomic/1.cc: Suppress deprecated
 	warnings.
 	* testsuite/20_util/shared_ptr/atomic/2.cc: Likewise.
 	* testsuite/20_util/shared_ptr/atomic/3.cc: Likewise.
 	* testsuite/29_atomics/atomic/lwg3220.cc: Likewise.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/std_mutex.h (lock_guard): Add [[nodiscard]]
 	attribute to constructors.
 	* include/bits/unique_lock.h (unique_lock): Likewise.
 	* include/std/mutex (scoped_lock, scoped_lock<Mutex>): Likewise.
 	* testsuite/30_threads/lock_guard/cons/nodiscard.cc: New test.
 	* testsuite/30_threads/scoped_lock/cons/nodiscard.cc: New test.
 	* testsuite/30_threads/unique_lock/cons/nodiscard.cc: New test.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/span (span, as_bytes, as_writable_bytes): Add
 	[[nodiscard]] attribute on all non-void functions.
 	* testsuite/23_containers/span/back_assert_neg.cc: Suppress
 	nodiscard warning.
 	* testsuite/23_containers/span/back_neg.cc: Likewise.
 	* testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/first_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/first_neg.cc: Likewise.
 	* testsuite/23_containers/span/front_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/front_neg.cc: Likewise.
 	* testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/index_op_neg.cc: Likewise.
 	* testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/last_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/last_neg.cc: Likewise.
 	* testsuite/23_containers/span/subspan_2_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_3_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_4_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_5_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_6_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/subspan_neg.cc: Likewise.
 	* testsuite/23_containers/span/nodiscard.cc: New test.

 2023-11-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111638
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* linkage.m4 (GLIBCXX_MAYBE_UNDERSCORED_FUNCS): Remove.
 	(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1): Do not check for _foo.
 	(GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1): Likewise.
 	(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2): Likewise.
 	(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3): Likewise.
 	(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2): Do not use
 	GLIBCXX_MAYBE_UNDERSCORED_FUNCS.

 2023-11-11  Nathaniel Shead  <nathanieloshead@gmail.com>

 	PR libstdc++/79700
 	* include/c_global/cmath (acosf, acosl, asinf, asinl, atanf)
 	(atanl, atan2f, atan2l, ceilf, ceill, cosf, cosl, coshf, coshl)
 	(expf, expl, fabsf, fabsl, floorf, floorl, fmodf, fmodl, frexpf)
 	(frexpl, ldexpf, ldexpl, logf, logl, log10f, log10l, modff)
 	(modfl, powf, powl, sinf, sinl, sinhf, sinhl, sqrtf, sqrtl, tanf)
 	(tanl, tanhf, tanhl): Add using-declarations in namespace std.
 	* testsuite/26_numerics/headers/cmath/equivalent_functions.cc:
 	New test.
 	* testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
 	Add checks for existence of above names.

 2023-11-09  Arsen Arsenović  <arsen@aarsen.me>

 	* testsuite/20_util/scoped_allocator/noexcept.cc: Mark as
 	requiring hosted.

 2023-11-09  Arsen Arsenović  <arsen@aarsen.me>

 	* include/bits/memoryfwd.h: Remove HOSTED check around allocator
 	and its specializations.

 2023-11-09  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/112453
 	* include/std/ranges (__detail::__box<_Tp>::operator*): Define
 	&& overloads as well.
 	(__detail::__take_of_repeat_view): Forward __r when accessing
 	its _M_value member.
 	(__detail::__drop_of_repeat_view): Likewise.
 	* testsuite/std/ranges/repeat/1.cc (test07): New test.

 2023-11-09  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/hashtable_policy.h (_RehashStateGuard): New.
 	(_Insert_base<>::_M_insert_range(_IIt, _IIt, const _NodeGet&, false_type)):
 	Adapt.
 	* include/bits/hashtable.h (__rehash_guard_t): New.
 	(__rehash_state): Remove.
 	(_M_rehash): Remove.
 	(_M_rehash_aux): Rename into _M_rehash.
 	(_M_assign_elements, _M_insert_unique_node, _M_insert_multi_node): Adapt.
 	(rehash): Adapt.

 2023-11-09  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/hashtable_policy.h
 	(struct _NodePtrGuard<_HashtableAlloc, _NodePtr>): New.
 	(_ReuseAllocNode::operator()(_Args&&...)): Use latter to guard allocated node
 	pointer while constructing in place the value_type instance.

 2023-11-09  Alexandre Oliva  <oliva@adacore.com>

 	PR libstdc++/110807
 	* include/bits/stl_bvector.h (_Bit_iterator_base): Add
 	_M_assume_normalized member function.  Call it in _M_bump_up,
 	_M_bump_down, _M_incr, operator==, operator<=>, operator<, and
 	operator-.
 	(_Bit_iterator): Also call it in operator*.
 	(_Bit_const_iterator): Likewise.

 2023-11-07  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/hashtable_policy.h
 	(_Hashtable_alloc<>::_M_allocate_node): Add missing call to node destructor
 	on construct exception.

 2023-11-07  Richard Biener  <rguenther@suse.de>

 	PR libstdc++/112351
 	* src/c++98/locale.cc (locale::facet::_S_initialize_once):
 	Check whether _S_c_locale is already initialized.
 	(locale::facet::_S_get_c_locale): Always perform non-threadsafe
 	init when threadsafe init failed.

 2023-11-06  Ian Lance Taylor  <iant@golang.org>

 	PR libbacktrace/111315
 	PR libbacktrace/112263
 	* acinclude.m4: Set -D_GNU_SOURCE in BACKTRACE_CPPFLAGS and when
 	grepping link.h for dl_iterate_phdr.
 	* configure: Regenerate.

 2023-11-06  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/expected (expected::and_then, expected::or_else):
 	Add string literals to static assertions.
 	* include/std/optional (optional::and_then, optional::or_else):
 	Likewise.

 2023-11-04  Feng Jisen  <J1senn@outlook.com>

 	* include/bits/utility.h (_Nth_type): Remove redundant partial
 	specialization.

 2023-11-04  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110133
 	* include/std/system_error (system_error::system_error): Group
 	arguments so that concatenation can reuse rvalue's capacity.
 	* src/c++11/system_error.cc (strerror_string): New function.
 	[_GLIBCXX_HAVE_STRERROR_R] (use_strerror_result): New functions.
 	(generic_error_category::message): Use strerror_string.
 	(system_error_category::message): Likewise.

 2023-11-04  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/appendix_contributing.xml: Replace example that
 	uses a BADNAME.
 	* doc/html/manual/source_code_style.html: Regenerate.

 2023-11-02  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112314
 	* include/std/string_view (string_view::remove_suffix): Add
 	debug assertion.
 	* testsuite/21_strings/basic_string_view/modifiers/remove_prefix/debug.cc:
 	New test.
 	* testsuite/21_strings/basic_string_view/modifiers/remove_suffix/debug.cc:
 	New test.

 2023-11-02  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ENABLE_C99): Fix snprintf checks.
 	* configure: Regenerate.

 2023-10-30  François Dumont  <fdumont@gcc.gnu.org>

 	* config/abi/pre/gnu-versioned-namespace.ver: Add comment on recently
 	added emul TLS symbols.

 2023-10-30  François Dumont  <fdumont@gcc.gnu.org>

 	* src/experimental/contract.cc
 	[_GLIBCXX_INLINE_VERSION](handle_contract_violation): Rework comment.
 	Remove weak attribute.

 2023-10-29  François Dumont  <fdumont@gcc.gnu.org>

 	* config/abi/pre/gnu-versioned-namespace.ver: Add missing emul TLS
 	symbols.

 2023-10-29  François Dumont  <fdumont@gcc.gnu.org>

 	* src/experimental/contract.cc
 	[_GLIBCXX_INLINE_VERSION](handle_contract_violation): Provide symbol
 	without version namespace decoration for gcc.

 2023-10-26  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/112089
 	* include/std/shared_mutex (shared_lock::unlock): Change errc
 	constant to operation_not_permitted.
 	* testsuite/30_threads/shared_lock/locking/112089.cc: New test.

 2023-10-26  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/duration/io.cc: Double timeout using
 	dg-timeout-factor.
 	* testsuite/std/time/day/io.cc: Likewise.
 	* testsuite/std/time/format.cc: Likewise.
 	* testsuite/std/time/hh_mm_ss/io.cc: Likewise.
 	* testsuite/std/time/month/io.cc: Likewise.
 	* testsuite/std/time/month_day/io.cc: Likewise.
 	* testsuite/std/time/month_day_last/io.cc: Likewise.
 	* testsuite/std/time/month_weekday/io.cc: Likewise.
 	* testsuite/std/time/month_weekday_last/io.cc: Likewise.
 	* testsuite/std/time/weekday/io.cc: Likewise.
 	* testsuite/std/time/weekday_indexed/io.cc: Likewise.
 	* testsuite/std/time/weekday_last/io.cc: Likewise.
 	* testsuite/std/time/year/io.cc: Likewise.
 	* testsuite/std/time/year_month/io.cc: Likewise.
 	* testsuite/std/time/year_month_day/io.cc: Likewise.
 	* testsuite/std/time/year_month_day_last/io.cc: Likewise.
 	* testsuite/std/time/year_month_weekday/io.cc: Likewise.
 	* testsuite/std/time/year_month_weekday_last/io.cc: Likewise.
 	* testsuite/std/time/zoned_time/io.cc: Likewise.

 2023-10-25  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111936
 	* src/libbacktrace/Makefile.am: Add -prefer-pic to libtool
 	compile commands.
 	* src/libbacktrace/Makefile.in: Regenerate.

 2023-10-24  Paul M. Bendixen  <paulbendixen@gmail.com>

 	* include/Makefile.am: Move cstdarg, cstdalign and cstdbool to
 	freestanding.
 	* include/Makefile.in: Regenerate.

 2023-10-22  Iain Sandoe  <iain@sandoe.co.uk>

 	* configure: Regenerate.
 	* configure.ac: Handle Darwin rpaths.
 	* src/Makefile.am: Handle Darwin rpaths.
 	* src/Makefile.in: Regenerate.

 2023-10-21  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/basic_string.h (_M_init_local_buf()): New
 	function.
 	(_M_use_local_data()): Use _M_init_local_buf.
 	(basic_string(), basic_string(const Alloc&))
 	(basic_string(basic_string&&))
 	(basic_string(basic_string&&, const Alloc&)): Use
 	_M_init_local_buf instead of _M_use_local_data().
 	* include/bits/basic_string.tcc (swap(basic_string&))
 	(_M_construct(InIter, InIter, input_iterator_tag))
 	(_M_construct(InIter, InIter, forward_iterator_tag))
 	(_M_construct(size_type, CharT), reserve()): Likewise.

 2023-10-21  Benjamin Brock  <brock@cs.berkeley.edu>

 	* include/std/ranges (zip_view, adjacent_view): Implement
 	workaround for LLVM-61763.

 2023-10-21  Dimitrij Mijoski  <dmjpp@hotmail.com>

 	* testsuite/22_locale/codecvt/codecvt_unicode.h: Test length()

 2023-10-21  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/fs_dir.h (operator==(default_sentinel_t)): Fix
 	indentation.

 2023-10-20  Marek Polacek  <polacek@redhat.com>

 	PR testsuite/111883
 	* include/std/charconv (from_chars): Add explicit casts.

 2023-10-19  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/hashtable_policy.h
 	(_Hash_code_base::_M_hash_code(const _Hash&, const _Hash_node_value<>&)): Remove.
 	(_Hash_code_base::_M_hash_code<_H2>(const _H2&, const _Hash_node_value<>&)): Remove.
 	* include/bits/hashtable.h
 	(_M_src_hash_code<_H2>(const _H2&, const key_type&, const __node_value_type&)): New.
 	(_M_merge_unique<>, _M_merge_multi<>): Use latter.
 	* testsuite/23_containers/unordered_map/modifiers/merge.cc
 	(test04, test05, test06): New test cases.

 2023-10-13  Jakub Jelinek  <jakub@redhat.com>

 	* testsuite/tr1/8_c_compatibility/cstdio/functions.cc (test01):
 	Initialize stream to va_arg(ap, FILE*) rather than 0.
 	* testsuite/tr1/8_c_compatibility/cwchar/functions.cc (test01):
 	Likewise.

 2023-10-13  Hans-Peter Nilsson  <hp@axis.com>

 	* testsuite/29_atomics/atomic/compare_exchange_padding.cc,
 	testsuite/29_atomics/atomic_flag/clear/1.cc,
 	testsuite/29_atomics/atomic_flag/cons/value_init.cc,
 	testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc,
 	testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc,
 	testsuite/29_atomics/atomic_ref/compare_exchange_padding.cc,
 	testsuite/29_atomics/atomic_ref/generic.cc,
 	testsuite/29_atomics/atomic_ref/integral.cc,
 	testsuite/29_atomics/atomic_ref/pointer.cc: Replace
 	dg-require-thread-fence with dg-require-atomic-cmpxchg-word.

 2023-10-13  Hans-Peter Nilsson  <hp@axis.com>

 	* testsuite/lib/dg-options.exp (dg-require-atomic-cmpxchg-word):
 	New proc.
 	* testsuite/lib/libstdc++.exp (check_v3_target_atomic_cmpxchg_word):
 	Ditto.

 2023-10-05  François Dumont  <fdumont@gcc.gnu.org>

 	* config/abi/pre/gnu-versioned-namespace.ver: Add missing symbols
 	for _Float{16,32,64,128,32x,64x,128x}.

 2023-10-04  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py
 	(StdExpAnyPrinter.__init__): Qualify call to
 	_string_types.

 2023-10-04  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py: Assume that
 	_versioned_namespace is non-None.
 	* python/libstdcxx/v6/xmethods.py (is_specialization_of):
 	Assume that _versioned_namespace is non-None.

 2023-10-04  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/xmethods.py (_versioned_namespace):
 	Define.

 2023-09-29  Dimitrij Mijoski  <dmjpp@hotmail.com>

 	PR libstdc++/108976
 	* src/c++11/codecvt.cc (read_utf8_code_point): Fix handing of
 	surrogates in UTF-8.
 	(ucs4_out): Fix handling of surrogates in UCS-4 -> UTF-8.
 	(ucs4_in): Fix handling of range with odd number of bytes.
 	(ucs4_out): Fix handling of surrogates in UCS-4 -> UTF-16.
 	(ucs2_out): Fix handling of surrogates in UCS-2 -> UTF-16.
 	(ucs2_in): Fix handling of range with odd number of bytes.
 	(__codecvt_utf16_base<char16_t>::do_in): Likewise.
 	(__codecvt_utf16_base<char32_t>::do_in): Likewise.
 	(__codecvt_utf16_base<wchar_t>::do_in): Likewise.
 	* testsuite/22_locale/codecvt/codecvt_unicode.cc: Renames, add
 	tests for codecvt_utf16<char16_t> and codecvt_utf16<char32_t>.
 	* testsuite/22_locale/codecvt/codecvt_unicode.h: Refactor UTF-8
 	testing functions for char8_t, add more test cases for errors,
 	add testing functions for codecvt_utf16.
 	* testsuite/22_locale/codecvt/codecvt_unicode_wchar_t.cc:
 	Renames, add tests for codecvt_utf16<whchar_t>.
 	* testsuite/22_locale/codecvt/codecvt_utf16/79980.cc (test06):
 	Fix test.
 	* testsuite/22_locale/codecvt/codecvt_unicode_char8_t.cc: New
 	test.

 2023-09-29  Nathaniel Shead  <nathanieloshead@gmail.com>

 	* include/bits/basic_string.h: (basic_string(basic_string&&)):
 	Activate _M_local_buf when needed.
 	(basic_string(basic_string&&, const _Alloc&)): Likewise.
 	* include/bits/basic_string.tcc: (basic_string::swap): Likewise.
 	* include/std/variant: (__detail::__variant::__construct_n): New.
 	(__detail::__variant::__emplace): Use __construct_n.

 2023-09-28  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py (Printer.add_version)
 	(add_one_template_type_printer)
 	(FilteringTypePrinter.add_one_type_printer): Use Python
 	"not in" operator.

 2023-09-28  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py (std_ratio_t_tuple):
 	Remove.

 2023-09-28  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py
 	(StdExpOptionalPrinter.__init__, lookup_node_type):
 	Remove unused variables.

 2023-09-28  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py: Don't import 'os'.
 	* python/libstdcxx/v6/__init__.py: Don't import 'gdb'.

 2023-09-28  Tom Tromey  <tromey@adacore.com>

 	* python/libstdcxx/v6/printers.py: Use gdb.ValuePrinter
 	everywhere.  Rename members to start with "_".

 2023-09-28  Tom Tromey  <tromey@adacore.com>

 	* testsuite/lib/gdb-test.exp (gdb-test): Enable Python
 	stack traces from gdb.

 2023-09-28  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/xmethods.py (is_specialization_of): Define
 	new function.
 	(ArrayMethodsMatcher, DequeMethodsMatcher)
 	(ForwardListMethodsMatcher, ListMethodsMatcher)
 	(VectorMethodsMatcher, AssociativeContainerMethodsMatcher)
 	(UniquePtrGetWorker, UniquePtrMethodsMatcher)
 	(SharedPtrSubscriptWorker, SharedPtrMethodsMatcher): Use
 	is_specialization_of instead of re.match.

 2023-09-28  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py: Break long lines. Use raw
 	strings for regular expressions. Add whitespace around
 	operators.
 	(is_member_of_namespace): Use isinstance to check type.
 	(is_specialization_of): Likewise. Adjust template_name
 	for versioned namespace instead of duplicating the re.match
 	call.
 	(StdExpAnyPrinter._string_types): New static method.
 	(StdExpAnyPrinter.to_string): Use _string_types.

 2023-09-28  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py: Format docstrings according
 	to PEP 257.
 	* python/libstdcxx/v6/xmethods.py: Likewise.

 2023-09-28  Tim Song  <t.canens.cpp@gmail.com>

 	PR libstdc++/111050
 	* include/bits/hashtable_policy.h
 	(_Hash_node_value_base<>::_M_valptr(), _Hash_node_value_base<>::_M_v())
 	Add [[__gnu__::__always_inline__]].

 2023-09-27  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py (StdChronoTimeZoneRulePrinter):
 	Fix incorrect number of replacement fields.

 2023-09-26  Hans-Peter Nilsson  <hp@axis.com>

 	* testsuite/29_atomics/atomic_flag/cons/value_init.cc: Add
 	dg-require-thread-fence.

 2023-09-25  Patrick Palka  <ppalka@redhat.com>

 	* include/std/charconv (__detail::__integer_to_chars_result_type):
 	Remove.
 	(__detail::__to_chars_16): Use to_chars_result as return type.
 	(__detail::__to_chars_10): Likewise.
 	(__detail::__to_chars_8): Likewise.
 	(__detail::__to_chars_2): Likewise.
 	(__detail::__to_chars_i): Likewise.
 	(__detail::__integer_from_chars_result_type): Inline the
 	constraint into ...
 	(from_chars): ... here.  Use __is_standard_integer in the
 	constraint.  Encode constraint as a defaulted non-type template
 	parameter instead of within the return type.

 2023-09-25  John David Anglin  <danglin@gcc.gnu.org>

 	* config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.

 2023-09-25  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111511
 	PR c++/111512
 	* include/std/array (to_array): Cast memcpy arguments to void*.
 	* testsuite/23_containers/array/creation/111512.cc: New test.

 2023-09-25  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/move.h (forward_list): Define for C++23.
 	* include/bits/version.def (forward_like): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/utility (__glibcxx_want_forward_like): Define.
 	* testsuite/20_util/forward_like/1.cc: New test.
 	* testsuite/20_util/forward_like/2_neg.cc: New test.
 	* testsuite/20_util/forward_like/version.cc: New test.

 2023-09-19  Marek Polacek  <polacek@redhat.com>

 	* testsuite/20_util/allocator/105975.cc: Add dg-error.

 2023-09-18  Patrick Palka  <ppalka@redhat.com>

 	PR c++/63198
 	PR c++/18474
 	* testsuite/26_numerics/random/discard_block_engine/cons/seed_seq2.cc:
 	Make data member seed_seq::called mutable.
 	* testsuite/26_numerics/random/independent_bits_engine/cons/seed_seq2.cc:
 	Likewise.
 	* testsuite/26_numerics/random/linear_congruential_engine/cons/seed_seq2.cc:
 	Likewise.
 	* testsuite/26_numerics/random/mersenne_twister_engine/cons/seed_seq2.cc:
 	Likewise.
 	* testsuite/26_numerics/random/shuffle_order_engine/cons/seed_seq2.cc:
 	Likewise.
 	* testsuite/26_numerics/random/subtract_with_carry_engine/cons/seed_seq2.cc:
 	Likewise.
 	* testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/seed_seq2.cc:
 	Likewise.

 2023-09-18  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/status_cxx2020.xml: Tweak P1466R3 status.
 	* doc/html/manual/status.html: Regenerate.

 2023-09-18  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/configure.xml: Use conventional option name.
 	* doc/xml/manual/status_cxx2020.xml: Update.
 	* doc/xml/manual/status_cxx2023.xml: Update.
 	* doc/html/*: Regenerate.

 2023-09-18  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/intro.xml: Clarify that building libstdc++
 	separately from GCC is not supported.
 	* doc/xml/manual/prerequisites.xml: Note msgfmt prerequisite for
 	testing.
 	* doc/html/manual/setup.html: Regenerate.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/29_atomics/atomic_ref/wait_notify.cc: Do not
 	restrict to pthreads targets.
 	* testsuite/30_threads/jthread/3.cc: Likewise.
 	* testsuite/30_threads/semaphore/100806.cc: Likewise.
 	* testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
 	* testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
 	* testsuite/30_threads/semaphore/try_acquire_posix.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/coroutines/95917.cc: Remove dg-options
 	-std=gnu++2a.
 	* testsuite/18_support/coroutines/hash.cc: Likewise.
 	* testsuite/18_support/coroutines/lwg3460.cc: Likewise.
 	* testsuite/18_support/destroying_delete.cc: Likewise.
 	* testsuite/18_support/source_location/1.cc: Likewise.
 	* testsuite/18_support/source_location/consteval.cc: Likewise.
 	* testsuite/18_support/source_location/version.cc: Likewise.
 	* testsuite/19_diagnostics/error_category/operators/three_way.cc:
 	Likewise.
 	* testsuite/19_diagnostics/error_code/operators/three_way.cc:
 	Likewise.
 	* testsuite/19_diagnostics/error_condition/operators/three_way.cc:
 	Likewise.
 	* testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
 	* testsuite/26_numerics/adjacent_difference/lwg2055.cc:
 	Likewise.
 	* testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
 	Likewise.
 	* testsuite/28_regex/iterators/regex_iterator/lwg3719.cc:
 	Likewise.
 	* testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc:
 	Likewise.
 	* testsuite/28_regex/sub_match/compare_c++20.cc: Likewise.
 	* testsuite/experimental/filesystem/iterators/106201.cc:
 	Likewise.
 	* testsuite/experimental/scopeguard/exit.cc: Likewise.
 	* testsuite/experimental/scopeguard/uniqueres.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/30_threads/barrier/1.cc: Remove dg-options
 	-std=gnu++20.
 	* testsuite/30_threads/barrier/2.cc: Likewise.
 	* testsuite/30_threads/barrier/arrive.cc: Likewise.
 	* testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
 	* testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
 	* testsuite/30_threads/barrier/completion.cc: Likewise.
 	* testsuite/30_threads/condition_variable/members/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/condition_variable_any/stop_token/1.cc:
 	Likewise.
 	* testsuite/30_threads/condition_variable_any/stop_token/2.cc:
 	Likewise.
 	* testsuite/30_threads/future/members/clock_neg.cc: Likewise.
 	* testsuite/30_threads/headers/stop_token/synopsis.cc: Likewise.
 	* testsuite/30_threads/headers/thread/types_std_c++20.cc:
 	Likewise.
 	* testsuite/30_threads/jthread/1.cc: Likewise.
 	* testsuite/30_threads/jthread/100612.cc: Likewise.
 	* testsuite/30_threads/jthread/95989.cc: Likewise.
 	* testsuite/30_threads/jthread/jthread.cc: Likewise.
 	* testsuite/30_threads/jthread/version.cc: Likewise.
 	* testsuite/30_threads/latch/1.cc: Likewise.
 	* testsuite/30_threads/latch/2.cc: Likewise.
 	* testsuite/30_threads/latch/3.cc: Likewise.
 	* testsuite/30_threads/recursive_timed_mutex/try_lock_until/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/semaphore/1.cc: Likewise.
 	* testsuite/30_threads/semaphore/2.cc: Likewise.
 	* testsuite/30_threads/semaphore/least_max_value_neg.cc:
 	Likewise.
 	* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
 	* testsuite/30_threads/shared_future/members/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/shared_lock/locking/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/1.cc: Likewise.
 	* testsuite/30_threads/stop_token/2.cc: Likewise.
 	* testsuite/30_threads/stop_token/stop_callback.cc: Likewise.
 	* testsuite/30_threads/stop_token/stop_callback/deadlock.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_callback/invoke.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_source.cc: Likewise.
 	* testsuite/30_threads/stop_token/stop_source/assign.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_token.cc: Likewise.
 	* testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
 	Likewise.
 	* testsuite/30_threads/thread/id/operators_c++20.cc: Likewise.
 	* testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc:
 	Likewise.
 	* testsuite/30_threads/unique_lock/locking/clock_neg.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc:
 	Remove dg-options -std=gnu++2a.
 	* testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
 	Likewise.
 	* testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
 	Likewise.
 	* testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
 	Likewise.
 	* testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise.
 	* testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_istringstream/str/char/2.cc: Likewise.
 	* testsuite/27_io/basic_istringstream/str/wchar_t/2.cc:
 	Likewise.
 	* testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_istringstream/view/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_ostream/emit/1.cc: Likewise.
 	* testsuite/27_io/basic_ostream/inserters_character/char/deleted.cc:
 	Likewise.
 	* testsuite/27_io/basic_ostream/inserters_character/wchar_t/deleted.cc:
 	Likewise.
 	* testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 	* testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_ostringstream/str/char/3.cc: Likewise.
 	* testsuite/27_io/basic_ostringstream/str/wchar_t/3.cc:
 	Likewise.
 	* testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
 	* testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
 	* testsuite/27_io/basic_stringbuf/str/char/4.cc: Likewise.
 	* testsuite/27_io/basic_stringbuf/str/wchar_t/4.cc: Likewise.
 	* testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
 	* testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 	* testsuite/27_io/basic_stringstream/cons/char/97719.cc:
 	Likewise.
 	* testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_stringstream/str/char/5.cc: Likewise.
 	* testsuite/27_io/basic_stringstream/str/wchar_t/5.cc.cc:
 	Likewise.
 	* testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_stringstream/view/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_syncbuf/1.cc: Likewise.
 	* testsuite/27_io/basic_syncbuf/2.cc: Likewise.
 	* testsuite/27_io/basic_syncbuf/basic_ops/1.cc: Likewise.
 	* testsuite/27_io/basic_syncbuf/requirements/types.cc: Likewise.
 	* testsuite/27_io/basic_syncbuf/sync_ops/1.cc: Likewise.
 	* testsuite/27_io/basic_syncstream/1.cc: Likewise.
 	* testsuite/27_io/basic_syncstream/2.cc: Likewise.
 	* testsuite/27_io/basic_syncstream/basic_ops/1.cc: Likewise.
 	* testsuite/27_io/basic_syncstream/requirements/types.cc:
 	Likewise.
 	* testsuite/27_io/filesystem/iterators/106201.cc: Likewise.
 	* testsuite/27_io/filesystem/iterators/lwg3719.cc: Likewise.
 	* testsuite/27_io/filesystem/path/factory/u8path-depr.cc:
 	Likewise.
 	* testsuite/27_io/filesystem/path/nonmember/cmp_c++20.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/26_numerics/accumulate/constexpr.cc: Remove
 	dg-options -std=gnu++2a.
 	* testsuite/26_numerics/accumulate/lwg2055.cc: Likewise.
 	* testsuite/26_numerics/adjacent_difference/constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/bit/bit.cast/105027.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.cast/bit_cast.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.cast/version.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc:
 	Likewise.
 	* testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.pow.two/lwg3656.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
 	* testsuite/26_numerics/bit/header-2.cc: Likewise.
 	* testsuite/26_numerics/bit/header.cc: Likewise.
 	* testsuite/26_numerics/complex/1.cc: Likewise.
 	* testsuite/26_numerics/complex/2.cc: Likewise.
 	* testsuite/26_numerics/complex/comparison_operators/more_constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/complex/operators/more_constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/complex/requirements/more_constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/complex/value_operations/more_constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/endian/1.cc: Likewise.
 	* testsuite/26_numerics/endian/2.cc: Likewise.
 	* testsuite/26_numerics/endian/3.cc: Likewise.
 	* testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
 	* testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
 	* testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
 	* testsuite/26_numerics/inner_product/lwg2055.cc: Likewise.
 	* testsuite/26_numerics/iota/constexpr.cc: Likewise.
 	* testsuite/26_numerics/lerp/1.cc: Likewise.
 	* testsuite/26_numerics/lerp/constexpr.cc: Likewise.
 	* testsuite/26_numerics/lerp/version.cc: Likewise.
 	* testsuite/26_numerics/midpoint/floating.cc: Likewise.
 	* testsuite/26_numerics/midpoint/integral.cc: Likewise.
 	* testsuite/26_numerics/midpoint/pointer.cc: Likewise.
 	* testsuite/26_numerics/midpoint/pointer_neg.cc: Likewise.
 	* testsuite/26_numerics/midpoint/version.cc: Likewise.
 	* testsuite/26_numerics/numbers/1.cc: Likewise.
 	* testsuite/26_numerics/numbers/2.cc: Likewise.
 	* testsuite/26_numerics/numbers/3.cc: Likewise.
 	* testsuite/26_numerics/numbers/float128.cc: Likewise.
 	* testsuite/26_numerics/numbers/nonfloat_neg.cc: Likewise.
 	* testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
 	* testsuite/26_numerics/partial_sum/lwg2055.cc: Likewise.
 	* testsuite/26_numerics/random/concept.cc: Likewise.
 	* testsuite/26_numerics/reduce/constexpr.cc: Likewise.
 	* testsuite/26_numerics/slice/compare.cc: Likewise.
 	* testsuite/26_numerics/transform_exclusive_scan/constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/transform_inclusive_scan/constexpr.cc:
 	Likewise.
 	* testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/24_iterators/aliases.cc: Remove dg-options
 	-std=gnu++2a.
 	* testsuite/24_iterators/associated_types/incrementable.traits.cc:
 	Likewise.
 	* testsuite/24_iterators/associated_types/iterator.traits.cc:
 	Likewise.
 	* testsuite/24_iterators/associated_types/readable.traits.cc:
 	Likewise.
 	* testsuite/24_iterators/back_insert_iterator/constexpr.cc:
 	Likewise.
 	* testsuite/24_iterators/back_insert_iterator/pr93884.cc:
 	Likewise.
 	* testsuite/24_iterators/bidirectional/concept.cc: Likewise.
 	* testsuite/24_iterators/common_iterator/1.cc: Likewise.
 	* testsuite/24_iterators/common_iterator/100823.cc: Likewise.
 	* testsuite/24_iterators/common_iterator/2.cc: Likewise.
 	* testsuite/24_iterators/contiguous/concept.cc: Likewise.
 	* testsuite/24_iterators/contiguous/tag.cc: Likewise.
 	* testsuite/24_iterators/counted_iterator/1.cc: Likewise.
 	* testsuite/24_iterators/counted_iterator/lwg3389.cc: Likewise.
 	* testsuite/24_iterators/counted_iterator/lwg3643.cc: Likewise.
 	* testsuite/24_iterators/customization_points/92894.cc:
 	Likewise.
 	* testsuite/24_iterators/customization_points/iter_move.cc:
 	Likewise.
 	* testsuite/24_iterators/customization_points/iter_swap.cc:
 	Likewise.
 	* testsuite/24_iterators/customization_points/lwg3420.cc:
 	Likewise.
 	* testsuite/24_iterators/forward/concept.cc: Likewise.
 	* testsuite/24_iterators/front_insert_iterator/constexpr.cc:
 	Likewise.
 	* testsuite/24_iterators/front_insert_iterator/pr93884.cc:
 	Likewise.
 	* testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
 	Likewise.
 	* testsuite/24_iterators/indirect_callable/92894.cc: Likewise.
 	* testsuite/24_iterators/indirect_callable/projected-adl.cc:
 	Likewise.
 	* testsuite/24_iterators/indirect_callable/projected.cc:
 	Likewise.
 	* testsuite/24_iterators/input/concept.cc: Likewise.
 	* testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
 	* testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
 	Likewise.
 	* testsuite/24_iterators/istream_iterator/sentinel.cc: Likewise.
 	* testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
 	Likewise.
 	* testsuite/24_iterators/istreambuf_iterator/sentinel.cc:
 	Likewise.
 	* testsuite/24_iterators/move_iterator/cust.cc: Likewise.
 	* testsuite/24_iterators/move_iterator/dr3435.cc: Likewise.
 	* testsuite/24_iterators/move_iterator/input_iterator.cc:
 	Likewise.
 	* testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
 	* testsuite/24_iterators/move_iterator/lwg3391.cc: Likewise.
 	* testsuite/24_iterators/move_iterator/move_only.cc: Likewise.
 	* testsuite/24_iterators/move_iterator/p2520r0.cc: Likewise.
 	* testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
 	Likewise.
 	* testsuite/24_iterators/move_iterator/sentinel.cc: Likewise.
 	* testsuite/24_iterators/normal_iterator/cmp_c++20.cc: Likewise.
 	* testsuite/24_iterators/output/concept.cc: Likewise.
 	* testsuite/24_iterators/random_access/concept.cc: Likewise.
 	* testsuite/24_iterators/range_access/range_access_cpp20.cc:
 	Likewise.
 	* testsuite/24_iterators/range_access/range_access_cpp20_neg.cc:
 	Likewise.
 	* testsuite/24_iterators/range_operations/100768.cc: Likewise.
 	* testsuite/24_iterators/range_operations/advance.cc: Likewise.
 	* testsuite/24_iterators/range_operations/advance_overflow.cc:
 	Likewise.
 	* testsuite/24_iterators/range_operations/distance.cc: Likewise.
 	* testsuite/24_iterators/range_operations/lwg3392.cc: Likewise.
 	* testsuite/24_iterators/range_operations/next.cc: Likewise.
 	* testsuite/24_iterators/range_operations/prev.cc: Likewise.
 	* testsuite/24_iterators/reverse_iterator/cust.cc: Likewise.
 	* testsuite/24_iterators/reverse_iterator/dr3435.cc: Likewise.
 	* testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/23_containers/array/comparison_operators/96851.cc:
 	Remove dg-options -std=gnu++2a.
 	* testsuite/23_containers/array/comparison_operators/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/array/creation/1.cc: Likewise.
 	* testsuite/23_containers/array/creation/110167.cc: Likewise.
 	* testsuite/23_containers/array/creation/2.cc: Likewise.
 	* testsuite/23_containers/array/creation/3_neg.cc: Likewise.
 	* testsuite/23_containers/array/requirements/constexpr_fill.cc:
 	Likewise.
 	* testsuite/23_containers/array/requirements/constexpr_swap.cc:
 	Likewise.
 	* testsuite/23_containers/deque/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/deque/erasure.cc: Likewise.
 	* testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/deque/operators/cmp_c++20.cc:
 	Likewise.
 	* testsuite/23_containers/forward_list/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/forward_list/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/forward_list/erasure.cc: Likewise.
 	* testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/forward_list/operations/remove_cxx20_return.cc:
 	Likewise.
 	* testsuite/23_containers/forward_list/operations/unique_cxx20_return.cc:
 	Likewise.
 	* testsuite/23_containers/list/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/list/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/list/erasure.cc: Likewise.
 	* testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/list/operations/remove_cxx20_return.cc:
 	Likewise.
 	* testsuite/23_containers/list/operations/unique_cxx20_return.cc:
 	Likewise.
 	* testsuite/23_containers/map/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/map/erasure.cc: Likewise.
 	* testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/map/operations/contains.cc: Likewise.
 	* testsuite/23_containers/map/operators/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/multimap/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/multimap/operations/contains.cc:
 	Likewise.
 	* testsuite/23_containers/multimap/operators/cmp_c++20.cc:
 	Likewise.
 	* testsuite/23_containers/multiset/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/multiset/operations/contains.cc:
 	Likewise.
 	* testsuite/23_containers/multiset/operators/cmp_c++20.cc:
 	Likewise.
 	* testsuite/23_containers/priority_queue/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/queue/92878_92947.cc: Likewise.
 	* testsuite/23_containers/queue/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/set/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/set/erasure.cc: Likewise.
 	* testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/set/operations/contains.cc: Likewise.
 	* testsuite/23_containers/set/operators/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/span/1.cc: Likewise.
 	* testsuite/23_containers/span/101411.cc: Likewise.
 	* testsuite/23_containers/span/2.cc: Likewise.
 	* testsuite/23_containers/span/deduction.cc: Likewise.
 	* testsuite/23_containers/span/explicit.cc: Likewise.
 	* testsuite/23_containers/span/layout_compat.cc: Likewise.
 	* testsuite/23_containers/span/lwg3255.cc: Likewise.
 	* testsuite/23_containers/span/nothrow_cons.cc: Likewise.
 	* testsuite/23_containers/span/trivially_copyable.cc: Likewise.
 	* testsuite/23_containers/stack/92878_92947.cc: Likewise.
 	* testsuite/23_containers/stack/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/unordered_map/48101-3_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 	* testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_map/operations/1.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_map/operations/contains.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multimap/48101-3_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multimap/operations/1.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multimap/operations/contains.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multiset/48101-3_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multiset/operations/1.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multiset/operations/contains.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_set/48101-3_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_set/erasure.cc: Likewise.
 	* testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_set/operations/1.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_set/operations/contains.cc:
 	Likewise.
 	* testsuite/23_containers/vector/48101-3_neg.cc: Likewise.
 	* testsuite/23_containers/vector/bool/capacity/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/vector/bool/cons/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/element_access/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/iterator_c++20.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/modifiers/assign/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/modifiers/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/bool/modifiers/swap/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/capacity/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/cmp_c++20.cc: Likewise.
 	* testsuite/23_containers/vector/cons/constexpr.cc: Likewise.
 	* testsuite/23_containers/vector/data_access/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/element_access/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/erasure.cc: Likewise.
 	* testsuite/23_containers/vector/modifiers/assign/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/modifiers/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
 	Likewise.
 	* testsuite/23_containers/vector/modifiers/swap/constexpr.cc:
 	Likewise.
 	* testsuite/23_containers/vector/requirements/version.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/21_strings/basic_string/cons/char/105995.cc: Remove
 	dg-options -std=gnu++20.
 	* testsuite/21_strings/basic_string/cons/char/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/cons/wchar_t/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/erasure.cc: Likewise.
 	* testsuite/21_strings/basic_string/hash/hash_char8_t.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/literals/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/modifiers/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/modifiers/swap/constexpr-wchar_t.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/modifiers/swap/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/ends_with/char.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/ends_with/nonnull.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/ends_with/wchar_t.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/starts_with/char.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/starts_with/nonnull.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/starts_with/wchar_t.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/cons/char/range.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/copy/char/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/copy/wchar_t/constexpr.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/ends_with/char.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/ends_with/nonnull.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/ends_with/wchar_t.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/starts_with/char.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/starts_with/nonnull.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operations/starts_with/wchar_t.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 	Likewise.
 	* testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/allocator/105975.cc: Remove dg-options
 	-std=gnu++2a.
 	* testsuite/20_util/allocator/rebind_c++20.cc: Likewise.
 	* testsuite/20_util/allocator/requirements/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/allocator/requirements/typedefs_c++20.cc:
 	Likewise.
 	* testsuite/20_util/allocator_traits/header-2.cc: Likewise.
 	* testsuite/20_util/allocator_traits/header.cc: Likewise.
 	* testsuite/20_util/allocator_traits/members/92878_92947.cc:
 	Likewise.
 	* testsuite/20_util/any/assign/92878_92947.cc: Likewise.
 	* testsuite/20_util/any/cons/92878_92947.cc: Likewise.
 	* testsuite/20_util/assume_aligned/1.cc: Likewise.
 	* testsuite/20_util/assume_aligned/2_neg.cc: Likewise.
 	* testsuite/20_util/assume_aligned/3.cc: Likewise.
 	* testsuite/20_util/assume_aligned/97132.cc: Likewise.
 	* testsuite/20_util/bind/constexpr.cc: Likewise.
 	* testsuite/20_util/bitset/operations/96303.cc: Likewise.
 	* testsuite/20_util/common_reference/100894.cc: Likewise.
 	* testsuite/20_util/common_reference/requirements/alias_decl.cc:
 	Likewise.
 	* testsuite/20_util/common_reference/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/common_reference/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/duration/comparison_operators/three_way.cc:
 	Likewise.
 	* testsuite/20_util/exchange/constexpr.cc: Likewise.
 	* testsuite/20_util/exchange/noexcept.cc: Likewise.
 	* testsuite/20_util/from_chars/1_c++20_neg.cc: Likewise.
 	* testsuite/20_util/from_chars/compare.cc: Likewise.
 	* testsuite/20_util/function_objects/bind_front/1.cc: Likewise.
 	* testsuite/20_util/function_objects/bind_front/107784.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/bind_front/111327.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/bind_front/2.cc: Likewise.
 	* testsuite/20_util/function_objects/bind_front/97101.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/bind_front/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/constexpr_searcher.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/identity/1.cc: Likewise.
 	* testsuite/20_util/function_objects/invoke/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/mem_fn/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/not_fn/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/integer_comparisons/1.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/2.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/equal.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/equal_neg.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/greater.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/greater_equal.cc:
 	Likewise.
 	* testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
 	Likewise.
 	* testsuite/20_util/integer_comparisons/greater_neg.cc:
 	Likewise.
 	* testsuite/20_util/integer_comparisons/in_range.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/in_range_neg.cc:
 	Likewise.
 	* testsuite/20_util/integer_comparisons/less.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/less_equal_neg.cc:
 	Likewise.
 	* testsuite/20_util/integer_comparisons/less_neg.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
 	* testsuite/20_util/integer_comparisons/not_equal_neg.cc:
 	Likewise.
 	* testsuite/20_util/is_bounded_array/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/is_bounded_array/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/is_bounded_array/value.cc: Likewise.
 	* testsuite/20_util/is_constant_evaluated/1.cc: Likewise.
 	* testsuite/20_util/is_constant_evaluated/noexcept.cc: Likewise.
 	* testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
 	* testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
 	Likewise.
 	* testsuite/20_util/is_layout_compatible/value.cc: Likewise.
 	* testsuite/20_util/is_layout_compatible/version.cc: Likewise.
 	* testsuite/20_util/is_nothrow_constructible/value_c++20.cc:
 	Likewise.
 	* testsuite/20_util/is_nothrow_convertible/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/is_nothrow_convertible/value.cc: Likewise.
 	* testsuite/20_util/is_pod/deprecated-2a.cc: Likewise.
 	* testsuite/20_util/is_pointer_interconvertible/value.cc:
 	Likewise.
 	* testsuite/20_util/is_pointer_interconvertible/version.cc:
 	Likewise.
 	* testsuite/20_util/is_pointer_interconvertible/with_class.cc:
 	Likewise.
 	* testsuite/20_util/is_unbounded_array/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/is_unbounded_array/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/is_unbounded_array/value.cc: Likewise.
 	* testsuite/20_util/optional/assignment/92878_92947.cc:
 	Likewise.
 	* testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
 	* testsuite/20_util/optional/constexpr/assign.cc: Likewise.
 	* testsuite/20_util/optional/constexpr/cons/conv.cc: Likewise.
 	* testsuite/20_util/optional/constexpr/modifiers.cc: Likewise.
 	* testsuite/20_util/optional/constexpr/swap.cc: Likewise.
 	* testsuite/20_util/optional/relops/96269.cc: Likewise.
 	* testsuite/20_util/optional/relops/three_way.cc: Likewise.
 	* testsuite/20_util/pair/comparison_operators/constexpr_c++20.cc:
 	Likewise.
 	* testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
 	* testsuite/20_util/pair/constexpr_assign.cc: Likewise.
 	* testsuite/20_util/pair/constexpr_swap.cc: Likewise.
 	* testsuite/20_util/pair/requirements/structural.cc: Likewise.
 	* testsuite/20_util/pointer_traits/pointer_to_constexpr.cc:
 	Likewise.
 	* testsuite/20_util/polymorphic_allocator/allocate_object.cc:
 	Likewise.
 	* testsuite/20_util/polymorphic_allocator/construct_c++2a.cc:
 	Likewise.
 	* testsuite/20_util/polymorphic_allocator/lwg3237.cc: Likewise.
 	* testsuite/20_util/reference_wrapper/constexpr.cc: Likewise.
 	* testsuite/20_util/reference_wrapper/incomplete.cc: Likewise.
 	* testsuite/20_util/remove_cvref/requirements/alias_decl.cc:
 	Likewise.
 	* testsuite/20_util/remove_cvref/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/remove_cvref/value.cc: Likewise.
 	* testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/casts/rval.cc: Likewise.
 	* testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/cons/alias-rval.cc: Likewise.
 	* testsuite/20_util/shared_ptr/creation/92878_92947.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/creation/array.cc: Likewise.
 	* testsuite/20_util/shared_ptr/creation/overwrite.cc: Likewise.
 	* testsuite/20_util/shared_ptr/creation/version.cc: Likewise.
 	* testsuite/20_util/time_point/4.cc: Likewise.
 	* testsuite/20_util/time_point/comparison_operators/three_way.cc:
 	Likewise.
 	* testsuite/20_util/to_address/1.cc: Likewise.
 	* testsuite/20_util/to_address/1_neg.cc: Likewise.
 	* testsuite/20_util/to_address/debug.cc: Likewise.
 	* testsuite/20_util/to_address/lwg3545.cc: Likewise.
 	* testsuite/20_util/to_chars/compare.cc: Likewise.
 	* testsuite/20_util/tuple/comparison_operators/three_way.cc:
 	Likewise.
 	* testsuite/20_util/tuple/cons/102270.cc: Likewise.
 	* testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc:
 	Likewise.
 	* testsuite/20_util/tuple/constexpr_swap.cc: Likewise.
 	* testsuite/20_util/type_identity/requirements/alias_decl.cc:
 	Likewise.
 	* testsuite/20_util/type_identity/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/type_identity/requirements/typedefs.cc:
 	Likewise.
 	* testsuite/20_util/typeindex/comparison_operators_c++20.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/comparison/compare_c++20.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/creation/92878_92947.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/creation/for_overwrite.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/io/lwg2948.cc: Likewise.
 	* testsuite/20_util/unwrap_reference/1.cc: Likewise.
 	* testsuite/20_util/unwrap_reference/2.cc: Likewise.
 	* testsuite/20_util/unwrap_reference/3.cc: Likewise.
 	* testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
 	* testsuite/20_util/uses_allocator/lwg3527.cc: Likewise.
 	* testsuite/20_util/uses_allocator/make_obj.cc: Likewise.
 	* testsuite/20_util/uses_allocator/uninitialized_construct.cc:
 	Likewise.
 	* testsuite/20_util/variant/92878_92947.cc: Likewise.
 	* testsuite/20_util/variant/95915.cc: Likewise.
 	* testsuite/20_util/variant/constexpr.cc: Likewise.
 	* testsuite/20_util/variant/relops/three_way.cc: Likewise.
 	* testsuite/20_util/variant/visit_neg.cc: Likewise.
 	* testsuite/20_util/variant/visit_r.cc: Likewise.
 	* testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/comparisons/algorithms/fallback.cc:
 	Remove dg-options -std=gnu++2a.
 	* testsuite/18_support/comparisons/algorithms/partial_order.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/algorithms/strong_order.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/algorithms/strong_order_floats.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/algorithms/weak_order.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/categories/94565.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/categories/partialord.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/categories/strongord.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/categories/weakord.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/categories/zero_neg.cc:
 	Likewise.
 	* testsuite/18_support/comparisons/common/1.cc: Likewise.
 	* testsuite/18_support/comparisons/object/93479.cc: Likewise.
 	* testsuite/18_support/comparisons/object/lwg3530.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/29_atomics/atomic/compare_exchange_padding.cc:
 	Remove dg-options -std=gnu++2a.
 	* testsuite/29_atomics/atomic/cons/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic/lock_free_aliases.cc: Likewise.
 	* testsuite/29_atomics/atomic/requirements/types_neg.cc:
 	Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/1.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/100334.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/102994.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/2.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/bool.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
 	* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
 	* testsuite/29_atomics/atomic_flag/cons/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic_flag/test/explicit.cc: Likewise.
 	* testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
 	* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/1.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/95282.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
 	* testsuite/29_atomics/atomic_integral/cons/value_init.cc:
 	Likewise.
 	* testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/compare_exchange_padding.cc:
 	Likewise.
 	* testsuite/29_atomics/atomic_ref/deduction.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/float.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/generic.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/integral.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/pointer.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/requirements.cc: Likewise.
 	* testsuite/29_atomics/headers/atomic/types_std_c++20.cc:
 	Likewise.
 	* testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc:
 	Likewise.
 	* testsuite/29_atomics/headers/atomic/types_std_c++2a.cc:
 	Likewise.
 	* testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/basic_filebuf/native_handle/char/1.cc: New test.
 	* testsuite/27_io/basic_filebuf/native_handle/wchar_t/1.cc: New test.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_CHECK_FILEBUF_NATIVE_HANDLES): New
 	macro.
 	* config.h.in: Regenerate.
 	* config/abi/pre/gnu.ver (GLIBCXX_3.4.32): Export new
 	basic_filebuf members.
 	* config/io/basic_file_stdio.cc (__basic_file::native_handle):
 	Define new function.
 	* config/io/basic_file_stdio.h (__basic_file::native_handle):
 	Declare new function.
 	* configure: Regenerate.
 	* configure.ac: Use GLIBCXX_CHECK_FILEBUF_NATIVE_HANDLES.
 	* include/bits/version.def (fstream_native_handles): New macro.
 	* include/bits/version.h: Regenerate.
 	* include/std/fstream (basic_filebuf::native_handle)
 	(basic_fstream::native_handle, basic_ifstream::native_handle)
 	(basic_ofstream::native_handle): New functions.
 	* src/c++11/Makefile.am: Move compilation of basic_file.cc,
 	locale_init.cc and localename.cc to here.
 	* src/c++11/Makefile.in: Regenerate.
 	* src/c++98/locale_init.cc: Moved to...
 	* src/c++11/locale_init.cc: ...here.
 	* src/c++98/localename.cc: Moved to...
 	* src/c++11/localename.cc: ...here.
 	* src/c++98/Makefile.am: Remove basic_file.cc, locale_init.cc
 	and localename.cc from here.
 	* src/c++98/Makefile.in: Regenerate.
 	* testsuite/27_io/basic_filebuf/native_handle/version.cc: New test.
 	* testsuite/27_io/basic_fstream/native_handle/char/1.cc: New test.
 	* testsuite/27_io/basic_fstream/native_handle/wchar_t/1.cc: New test.
 	* testsuite/27_io/basic_ifstream/native_handle/char/1.cc: New test.
 	* testsuite/27_io/basic_ifstream/native_handle/wchar_t/1.cc: New test.
 	* testsuite/27_io/basic_ofstream/native_handle/char/1.cc: New test.
 	* testsuite/27_io/basic_ofstream/native_handle/wchar_t/1.cc: New test.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/libstdc++-dg/conformance.exp: Add log line when
 	using testsuite_files.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/shared_ptr/atomic/3.cc: Simplify dg
 	directives.
 	* testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
 	Likewise.
 	* testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/allocate.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/cons.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/cons_single.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/is_equal.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/options.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/release.cc:
 	Likewise.
 	* testsuite/20_util/synchronized_pool_resource/release_single.cc:
 	Likewise.
 	* testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
 	Likewise.
 	* testsuite/30_threads/stop_token/stop_callback/destroy.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/23_containers/span/back_assert_neg.cc: Remove
 	dg-options and add effective target selector to dg-do. Add
 	no_pch.
 	* testsuite/23_containers/span/back_neg.cc: Likewise.
 	* testsuite/23_containers/span/cons_1_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/cons_2_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/first_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/first_neg.cc: Likewise.
 	* testsuite/23_containers/span/front_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/front_neg.cc: Likewise.
 	* testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/index_op_neg.cc: Likewise.
 	* testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/last_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/last_neg.cc: Likewise.
 	* testsuite/23_containers/span/subspan_2_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_3_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_4_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_5_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_6_assert_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
 	* testsuite/23_containers/span/subspan_neg.cc: Likewise.
 	* testsuite/24_iterators/range_operations/advance_debug_neg.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/headers/limits/synopsis_cxx23.cc: Remove
 	dg-options.
 	* testsuite/18_support/headers/stdfloat/types_std.cc: Likewise.
 	* testsuite/18_support/type_info/constexpr.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/current.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/entry.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/synopsis.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/version.cc: Likewise.
 	* testsuite/20_util/aligned_storage/deprecated-2b.cc: Likewise.
 	* testsuite/20_util/aligned_union/deprecated-2b.cc: Likewise.
 	* testsuite/20_util/bitset/access/constexpr.cc: Likewise.
 	* testsuite/20_util/bitset/cons/constexpr_c++23.cc: Likewise.
 	* testsuite/20_util/bitset/count/constexpr.cc: Likewise.
 	* testsuite/20_util/bitset/ext/constexpr.cc: Likewise.
 	* testsuite/20_util/bitset/operations/constexpr_c++23.cc:
 	Likewise.
 	* testsuite/20_util/bitset/version.cc: Likewise.
 	* testsuite/20_util/from_chars/8.cc: Likewise.
 	* testsuite/20_util/from_chars/constexpr.cc: Likewise.
 	* testsuite/20_util/function/cons/deduction_c++23.cc: Likewise.
 	* testsuite/20_util/function_objects/invoke/4.cc: Likewise.
 	* testsuite/20_util/function_objects/invoke/dangling_ref.cc:
 	Likewise.
 	* testsuite/20_util/is_scoped_enum/value.cc: Likewise.
 	* testsuite/20_util/is_scoped_enum/version.cc: Likewise.
 	* testsuite/20_util/move_only_function/call.cc: Likewise.
 	* testsuite/20_util/move_only_function/cons.cc: Likewise.
 	* testsuite/20_util/move_only_function/move.cc: Likewise.
 	* testsuite/20_util/move_only_function/version.cc: Likewise.
 	* testsuite/20_util/optional/monadic/and_then.cc: Likewise.
 	* testsuite/20_util/optional/monadic/or_else.cc: Likewise.
 	* testsuite/20_util/optional/monadic/or_else_neg.cc: Likewise.
 	* testsuite/20_util/optional/monadic/pr109242.cc: Likewise.
 	* testsuite/20_util/optional/monadic/transform.cc: Likewise.
 	* testsuite/20_util/pair/p2321r2.cc: Likewise.
 	* testsuite/20_util/reference_from_temporary/value.cc: Likewise.
 	* testsuite/20_util/reference_from_temporary/value2.cc:
 	Likewise.
 	* testsuite/20_util/reference_from_temporary/version.cc:
 	Likewise.
 	* testsuite/20_util/to_chars/constexpr.cc: Likewise.
 	* testsuite/20_util/to_chars/float128_c++23.cc: Likewise.
 	* testsuite/20_util/to_chars/float16_c++23.cc: Likewise.
 	* testsuite/20_util/to_chars/version.cc: Likewise.
 	* testsuite/20_util/to_underlying/1.cc: Likewise.
 	* testsuite/20_util/to_underlying/version.cc: Likewise.
 	* testsuite/20_util/tuple/p2321r2.cc: Likewise.
 	* testsuite/20_util/unique_ptr/assign/constexpr.cc: Likewise.
 	* testsuite/20_util/unique_ptr/comparison/constexpr.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/cons/constexpr_c++20.cc:
 	Likewise.
 	* testsuite/20_util/unique_ptr/creation/constexpr.cc: Likewise.
 	* testsuite/20_util/unique_ptr/modifiers/constexpr.cc: Likewise.
 	* testsuite/20_util/unique_ptr/specialized_algorithms/constexpr.cc: Likewise.
 	* testsuite/20_util/unreachable/1.cc: Likewise.
 	* testsuite/20_util/unreachable/version.cc: Likewise.
 	* testsuite/20_util/uses_allocator/lwg3677.cc: Likewise.
 	* testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc: Likewise.
 	* testsuite/21_strings/basic_string/operations/contains/char.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/operations/contains/nonnull.cc: Likewise.
 	* testsuite/21_strings/basic_string/operations/contains/wchar_t.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/operations/contains/char.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/operations/contains/nonnull.cc: Likewise.
 	* testsuite/21_strings/basic_string_view/operations/contains/wchar_t.cc: Likewise.
 	* testsuite/23_containers/queue/cons_from_iters.cc: Likewise.
 	* testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
 	* testsuite/23_containers/vector/bool/element_access/1.cc:
 	Likewise.
 	* testsuite/24_iterators/const_iterator/1.cc: Likewise.
 	* testsuite/25_algorithms/contains/1.cc: Likewise.
 	* testsuite/25_algorithms/contains_subrange/1.cc: Likewise.
 	* testsuite/25_algorithms/find_last/1.cc: Likewise.
 	* testsuite/25_algorithms/find_last_if/1.cc: Likewise.
 	* testsuite/25_algorithms/find_last_if_not/1.cc: Likewise.
 	* testsuite/25_algorithms/fold_left/1.cc: Likewise.
 	* testsuite/25_algorithms/fold_right/1.cc: Likewise.
 	* testsuite/25_algorithms/iota/1.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.byteswap/byteswap.cc: Likewise.
 	* testsuite/26_numerics/bit/bit.byteswap/version.cc: Likewise.
 	* testsuite/26_numerics/complex/ext_c++23.cc: Likewise.
 	* testsuite/26_numerics/headers/cmath/c99_classification_macros_c++23.cc: Likewise.
 	* testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc:
 	Likewise.
 	* testsuite/26_numerics/headers/cmath/functions_std_c++23.cc:
 	Likewise.
 	* testsuite/26_numerics/headers/cmath/nextafter_c++23.cc:
 	Likewise.
 	* testsuite/26_numerics/numbers/4.cc: Likewise.
 	* testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc: Likewise.
 	* testsuite/27_io/filesystem/path/native/conv_c++23.cc:
 	Likewise.
 	* testsuite/27_io/spanstream/1.cc: Likewise.
 	* testsuite/27_io/spanstream/2.cc: Likewise.
 	* testsuite/27_io/spanstream/version.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/requirements_cxx23.cc:
 	Likewise.
 	* testsuite/29_atomics/headers/stdatomic.h/c_compat.cc:
 	Likewise.
 	* testsuite/29_atomics/headers/stdatomic.h/version.cc: Likewise.
 	* testsuite/30_threads/packaged_task/cons/deduction_c++23.cc:
 	Likewise.
 	* testsuite/experimental/filesystem/path/native/conv_c++23.cc:
 	Likewise.
 	* testsuite/std/ranges/adaptors/adjacent/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/adjacent_transform/1.cc:
 	Likewise.
 	* testsuite/std/ranges/adaptors/as_const/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/as_rvalue/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/chunk/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/chunk_by/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/enumerate/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/join_with/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lwg3715.cc: Likewise.
 	* testsuite/std/ranges/adaptors/slide/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/stride/1.cc: Likewise.
 	* testsuite/std/ranges/cartesian_product/1.cc: Likewise.
 	* testsuite/std/ranges/range_adaptor_closure.cc: Likewise.
 	* testsuite/std/ranges/repeat/1.cc: Likewise.
 	* testsuite/std/ranges/version_c++23.cc: Likewise.
 	* testsuite/std/ranges/zip/1.cc: Likewise.
 	* testsuite/std/ranges/zip_transform/1.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/expected/assign.cc: Remove dg-options.
 	* testsuite/20_util/expected/bad.cc: Likewise.
 	* testsuite/20_util/expected/cons.cc: Likewise.
 	* testsuite/20_util/expected/equality.cc: Likewise.
 	* testsuite/20_util/expected/illformed_neg.cc: Likewise.
 	* testsuite/20_util/expected/lwg3877.cc: Likewise.
 	* testsuite/20_util/expected/lwg3938.cc: Likewise.
 	* testsuite/20_util/expected/monadic.cc: Likewise.
 	* testsuite/20_util/expected/observers.cc: Likewise.
 	* testsuite/20_util/expected/requirements.cc: Likewise.
 	* testsuite/20_util/expected/swap.cc: Likewise.
 	* testsuite/20_util/expected/synopsis.cc: Likewise.
 	* testsuite/20_util/expected/unexpected.cc: Likewise.
 	* testsuite/20_util/expected/version.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/duration/arithmetic/overflow_c++20.cc:
 	Remove dg-options.
 	* testsuite/20_util/duration/io.cc: Likewise.
 	* testsuite/std/time/clock/file/io.cc: Likewise.
 	* testsuite/std/time/clock/file/members.cc: Likewise.
 	* testsuite/std/time/clock/file/overview.cc: Likewise.
 	* testsuite/std/time/clock/gps/1.cc: Likewise.
 	* testsuite/std/time/clock/gps/io.cc: Likewise.
 	* testsuite/std/time/clock/local/io.cc: Likewise.
 	* testsuite/std/time/clock/system/io.cc: Likewise.
 	* testsuite/std/time/clock/tai/1.cc: Likewise.
 	* testsuite/std/time/clock/tai/io.cc: Likewise.
 	* testsuite/std/time/clock/utc/1.cc: Likewise.
 	* testsuite/std/time/clock/utc/io.cc: Likewise.
 	* testsuite/std/time/clock/utc/leap_second_info.cc: Likewise.
 	* testsuite/std/time/day/1.cc: Likewise.
 	* testsuite/std/time/day/io.cc: Likewise.
 	* testsuite/std/time/exceptions.cc: Likewise.
 	* testsuite/std/time/format.cc: Likewise.
 	* testsuite/std/time/hh_mm_ss/1.cc: Likewise.
 	* testsuite/std/time/hh_mm_ss/109772.cc: Likewise.
 	* testsuite/std/time/hh_mm_ss/io.cc: Likewise.
 	* testsuite/std/time/is_am/1.cc: Likewise.
 	* testsuite/std/time/is_pm/1.cc: Likewise.
 	* testsuite/std/time/make12/1.cc: Likewise.
 	* testsuite/std/time/make24/1.cc: Likewise.
 	* testsuite/std/time/month/1.cc: Likewise.
 	* testsuite/std/time/month/io.cc: Likewise.
 	* testsuite/std/time/month_day/1.cc: Likewise.
 	* testsuite/std/time/month_day/io.cc: Likewise.
 	* testsuite/std/time/month_day_last/1.cc: Likewise.
 	* testsuite/std/time/month_day_last/io.cc: Likewise.
 	* testsuite/std/time/month_weekday/1.cc: Likewise.
 	* testsuite/std/time/month_weekday/io.cc: Likewise.
 	* testsuite/std/time/month_weekday_last/1.cc: Likewise.
 	* testsuite/std/time/month_weekday_last/io.cc: Likewise.
 	* testsuite/std/time/parse.cc: Likewise.
 	* testsuite/std/time/syn_c++20.cc: Likewise.
 	* testsuite/std/time/time_zone/get_info_local.cc: Likewise.
 	* testsuite/std/time/time_zone/get_info_sys.cc: Likewise.
 	* testsuite/std/time/time_zone/requirements.cc: Likewise.
 	* testsuite/std/time/traits/is_clock.cc: Likewise.
 	* testsuite/std/time/tzdb/1.cc: Likewise.
 	* testsuite/std/time/tzdb/leap_seconds.cc: Likewise.
 	* testsuite/std/time/tzdb_list/1.cc: Likewise.
 	* testsuite/std/time/tzdb_list/requirements.cc: Likewise.
 	* testsuite/std/time/weekday/1.cc: Likewise.
 	* testsuite/std/time/weekday/io.cc: Likewise.
 	* testsuite/std/time/weekday_indexed/io.cc: Likewise.
 	* testsuite/std/time/weekday_last/1.cc: Likewise.
 	* testsuite/std/time/weekday_last/io.cc: Likewise.
 	* testsuite/std/time/year/1.cc: Likewise.
 	* testsuite/std/time/year/2.cc: Likewise.
 	* testsuite/std/time/year/io.cc: Likewise.
 	* testsuite/std/time/weekday_indexed/1.cc: Likewise.
 	* testsuite/std/time/year_month/1.cc: Likewise.
 	* testsuite/std/time/year_month/2.cc: Likewise.
 	* testsuite/std/time/year_month/io.cc: Likewise.
 	* testsuite/std/time/year_month_day/1.cc: Likewise.
 	* testsuite/std/time/year_month_day/2.cc: Likewise.
 	* testsuite/std/time/year_month_day/3.cc: Likewise.
 	* testsuite/std/time/year_month_day/4.cc: Likewise.
 	* testsuite/std/time/year_month_day/io.cc: Likewise.
 	* testsuite/std/time/year_month_day_last/1.cc: Likewise.
 	* testsuite/std/time/year_month_day_last/2.cc: Likewise.
 	* testsuite/std/time/year_month_day_last/io.cc: Likewise.
 	* testsuite/std/time/year_month_weekday/1.cc: Likewise.
 	* testsuite/std/time/year_month_weekday/2.cc: Likewise.
 	* testsuite/std/time/year_month_weekday/3.cc: Likewise.
 	* testsuite/std/time/year_month_weekday/io.cc: Likewise.
 	* testsuite/std/time/year_month_weekday_last/1.cc: Likewise.
 	* testsuite/std/time/year_month_weekday_last/2.cc: Likewise.
 	* testsuite/std/time/year_month_weekday_last/io.cc: Likewise.
 	* testsuite/std/time/zoned_time/1.cc: Likewise.
 	* testsuite/std/time/zoned_time/custom.cc: Likewise.
 	* testsuite/std/time/zoned_time/deduction.cc: Likewise.
 	* testsuite/std/time/zoned_time/io.cc: Likewise.
 	* testsuite/std/time/zoned_time/req_neg.cc: Likewise.
 	* testsuite/std/time/zoned_time/requirements.cc: Likewise.
 	* testsuite/std/time/zoned_traits.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/format/arguments/args.cc: Remove dg-options.
 	* testsuite/std/format/arguments/lwg3810.cc: Likewise.
 	* testsuite/std/format/error.cc: Likewise.
 	* testsuite/std/format/format_string.cc: Likewise.
 	* testsuite/std/format/formatter/concept.cc: Likewise.
 	* testsuite/std/format/formatter/ext_float.cc: Likewise.
 	* testsuite/std/format/formatter/requirements.cc: Likewise.
 	* testsuite/std/format/functions/107871.cc: Likewise.
 	* testsuite/std/format/functions/format.cc: Likewise.
 	* testsuite/std/format/functions/format_to.cc: Likewise.
 	* testsuite/std/format/functions/format_to_n.cc: Likewise.
 	* testsuite/std/format/functions/size.cc: Likewise.
 	* testsuite/std/format/functions/vformat_to.cc: Likewise.
 	* testsuite/std/format/parse_ctx.cc: Likewise.
 	* testsuite/std/format/string.cc: Likewise.
 	* testsuite/std/format/string_neg.cc: Likewise.
 	* testsuite/std/format/functions/format_c++23.cc: Removed.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/function_objects/range.cmp/equal_to.cc:
 	Remove dg-options.
 	* testsuite/20_util/function_objects/range.cmp/greater.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/range.cmp/greater_equal.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/range.cmp/less.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/range.cmp/less_equal.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/range.cmp/lwg3530.cc:
 	Likewise.
 	* testsuite/20_util/function_objects/range.cmp/not_equal_to.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/construct_at/1.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/construct_at/95788.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constrained.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_fill/constrained.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/adjacent_find/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/adjacent_find/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/all_of/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/all_of/constrained.cc: Likewise.
 	* testsuite/25_algorithms/any_of/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/any_of/constrained.cc: Likewise.
 	* testsuite/25_algorithms/binary_search/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/binary_search/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/clamp/constrained.cc: Likewise.
 	* testsuite/25_algorithms/constexpr_macro.cc: Likewise.
 	* testsuite/25_algorithms/copy/95578.cc: Likewise.
 	* testsuite/25_algorithms/copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/copy/constrained.cc: Likewise.
 	* testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Likewise.
 	* testsuite/25_algorithms/copy_backward/95578.cc: Likewise.
 	* testsuite/25_algorithms/copy_backward/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/copy_backward/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/copy_if/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/copy_if/constrained.cc: Likewise.
 	* testsuite/25_algorithms/copy_n/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/copy_n/constrained.cc: Likewise.
 	* testsuite/25_algorithms/count/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/count/constrained.cc: Likewise.
 	* testsuite/25_algorithms/count_if/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/count_if/constrained.cc: Likewise.
 	* testsuite/25_algorithms/cpp_lib_constexpr.cc: Likewise.
 	* testsuite/25_algorithms/equal/95578.cc: Likewise.
 	* testsuite/25_algorithms/equal/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/equal/constexpr_neg.cc: Likewise.
 	* testsuite/25_algorithms/equal/constrained.cc: Likewise.
 	* testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/equal_range/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/equal_range/constrained.cc: Likewise.
 	* testsuite/25_algorithms/fill/94017.cc: Likewise.
 	* testsuite/25_algorithms/fill/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/fill/constrained.cc: Likewise.
 	* testsuite/25_algorithms/fill_n/94017.cc: Likewise.
 	* testsuite/25_algorithms/fill_n/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/fill_n/constrained.cc: Likewise.
 	* testsuite/25_algorithms/find/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/find/constrained.cc: Likewise.
 	* testsuite/25_algorithms/find_end/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/find_end/constrained.cc: Likewise.
 	* testsuite/25_algorithms/find_first_of/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/find_first_of/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/find_if/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/find_if/constrained.cc: Likewise.
 	* testsuite/25_algorithms/find_if_not/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/find_if_not/constrained.cc: Likewise.
 	* testsuite/25_algorithms/for_each/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/for_each/constrained.cc: Likewise.
 	* testsuite/25_algorithms/generate/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/generate/constrained.cc: Likewise.
 	* testsuite/25_algorithms/generate_n/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/generate_n/constrained.cc: Likewise.
 	* testsuite/25_algorithms/heap/constrained.cc: Likewise.
 	* testsuite/25_algorithms/includes/constrained.cc: Likewise.
 	* testsuite/25_algorithms/inplace_merge/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/is_heap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/is_heap_until/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/is_partitioned/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/is_partitioned/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/is_permutation/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/is_permutation/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/is_sorted/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
 	* testsuite/25_algorithms/is_sorted_until/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/is_sorted_until/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/iter_swap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/lexicographical_compare/93972.cc:
 	Likewise.
 	* testsuite/25_algorithms/lexicographical_compare/95578.cc:
 	Likewise.
 	* testsuite/25_algorithms/lexicographical_compare/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/lexicographical_compare/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/lexicographical_compare_three_way/1.cc:
 	Likewise.
 	* testsuite/25_algorithms/lexicographical_compare_three_way/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/lower_bound/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/lower_bound/constrained.cc: Likewise.
 	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/make_heap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/max/constrained.cc: Likewise.
 	* testsuite/25_algorithms/max_element/constrained.cc: Likewise.
 	* testsuite/25_algorithms/merge/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/merge/constrained.cc: Likewise.
 	* testsuite/25_algorithms/min/constrained.cc: Likewise.
 	* testsuite/25_algorithms/min_element/constrained.cc: Likewise.
 	* testsuite/25_algorithms/minmax/constrained.cc: Likewise.
 	* testsuite/25_algorithms/minmax_element/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/mismatch/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/mismatch/constrained.cc: Likewise.
 	* testsuite/25_algorithms/move/93872.cc: Likewise.
 	* testsuite/25_algorithms/move/95578.cc: Likewise.
 	* testsuite/25_algorithms/move/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/move/constrained.cc: Likewise.
 	* testsuite/25_algorithms/move_backward/93872.cc: Likewise.
 	* testsuite/25_algorithms/move_backward/95578.cc: Likewise.
 	* testsuite/25_algorithms/move_backward/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/next_permutation/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/next_permutation/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/none_of/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/none_of/constrained.cc: Likewise.
 	* testsuite/25_algorithms/nth_element/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/nth_element/constrained.cc: Likewise.
 	* testsuite/25_algorithms/partial_sort/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
 	* testsuite/25_algorithms/partial_sort_copy/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/partial_sort_copy/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/partition/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/partition/constrained.cc: Likewise.
 	* testsuite/25_algorithms/partition_copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/partition_copy/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/partition_point/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/partition_point/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/pop_heap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/prev_permutation/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/prev_permutation/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/push_heap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/remove/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/remove/constrained.cc: Likewise.
 	* testsuite/25_algorithms/remove_copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/remove_copy/constrained.cc: Likewise.
 	* testsuite/25_algorithms/remove_copy_if/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/remove_copy_if/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/remove_if/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/remove_if/constrained.cc: Likewise.
 	* testsuite/25_algorithms/replace/constrained.cc: Likewise.
 	* testsuite/25_algorithms/replace_copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/replace_copy/constrained.cc: Likewise.
 	* testsuite/25_algorithms/replace_copy_if/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/replace_copy_if/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/replace_if/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/replace_if/constrained.cc: Likewise.
 	* testsuite/25_algorithms/reverse/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/reverse/constrained.cc: Likewise.
 	* testsuite/25_algorithms/reverse_copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/reverse_copy/constrained.cc: Likewise.
 	* testsuite/25_algorithms/rotate/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/rotate/constrained.cc: Likewise.
 	* testsuite/25_algorithms/rotate_copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/rotate_copy/constrained.cc: Likewise.
 	* testsuite/25_algorithms/sample/constrained.cc: Likewise.
 	* testsuite/25_algorithms/search/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/search/constrained.cc: Likewise.
 	* testsuite/25_algorithms/search_n/97828.cc: Likewise.
 	* testsuite/25_algorithms/search_n/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/search_n/constrained.cc: Likewise.
 	* testsuite/25_algorithms/set_difference/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/set_difference/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/set_intersection/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/set_intersection/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/set_symmetric_difference/constexpr.cc:
 	Likewise.
 	* testsuite/25_algorithms/set_symmetric_difference/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/set_union/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/set_union/constrained.cc: Likewise.
 	* testsuite/25_algorithms/shift_left/1.cc: Likewise.
 	* testsuite/25_algorithms/shift_right/1.cc: Likewise.
 	* testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
 	* testsuite/25_algorithms/sort/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/sort/constrained.cc: Likewise.
 	* testsuite/25_algorithms/sort_heap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/stable_partition/constrained.cc:
 	Likewise.
 	* testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
 	* testsuite/25_algorithms/swap/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/swap_ranges/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/swap_ranges/constrained.cc: Likewise.
 	* testsuite/25_algorithms/transform/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/transform/constrained.cc: Likewise.
 	* testsuite/25_algorithms/unique/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/unique/constrained.cc: Likewise.
 	* testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/unique_copy/constrained.cc: Likewise.
 	* testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
 	* testsuite/25_algorithms/upper_bound/constrained.cc: Likewise.
 	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
 	Likewise.
 	* testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/concepts/1.cc: Remove dg-options.
 	* testsuite/std/concepts/2.cc: Likewise.
 	* testsuite/std/concepts/concepts.callable/invocable.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.callable/regular_invocable.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.callable/relation.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.callable/strictweakorder.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.arithmetic/floating_point.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.arithmetic/signed_integral.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.assignable/1.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.common/1.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.commonref/1.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.constructible/1.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.convertible/1.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.copyconstructible/1.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.defaultinitializable/1.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.defaultinitializable/lwg3149.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.derived/1.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.destructible/1.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.moveconstructible/1.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.same/1.cc:
 	Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc: Likewise.
 	* testsuite/std/concepts/concepts.lang/concept.swappable/swappable_with.cc: Likewise.
 	* testsuite/std/concepts/concepts.object/copyable.cc: Likewise.
 	* testsuite/std/concepts/concepts.object/movable.cc: Likewise.
 	* testsuite/std/concepts/concepts.object/regular.cc: Likewise.
 	* testsuite/std/concepts/concepts.object/semiregular.cc:
 	Likewise.
 	* testsuite/std/ranges/97600.cc: Likewise.
 	* testsuite/std/ranges/access/101782.cc: Likewise.
 	* testsuite/std/ranges/access/begin.cc: Likewise.
 	* testsuite/std/ranges/access/begin_neg.cc: Likewise.
 	* testsuite/std/ranges/access/cbegin.cc: Likewise.
 	* testsuite/std/ranges/access/cdata.cc: Likewise.
 	* testsuite/std/ranges/access/cend.cc: Likewise.
 	* testsuite/std/ranges/access/crbegin.cc: Likewise.
 	* testsuite/std/ranges/access/crend.cc: Likewise.
 	* testsuite/std/ranges/access/data.cc: Likewise.
 	* testsuite/std/ranges/access/empty.cc: Likewise.
 	* testsuite/std/ranges/access/end.cc: Likewise.
 	* testsuite/std/ranges/access/end_neg.cc: Likewise.
 	* testsuite/std/ranges/access/lwg3467.cc: Likewise.
 	* testsuite/std/ranges/access/p2602.cc: Likewise.
 	* testsuite/std/ranges/access/rbegin.cc: Likewise.
 	* testsuite/std/ranges/access/rend.cc: Likewise.
 	* testsuite/std/ranges/access/size.cc: Likewise.
 	* testsuite/std/ranges/access/size_neg.cc: Likewise.
 	* testsuite/std/ranges/access/ssize.cc: Likewise.
 	* testsuite/std/ranges/adaptors/100479.cc: Likewise.
 	* testsuite/std/ranges/adaptors/100577.cc: Likewise.
 	* testsuite/std/ranges/adaptors/93978.cc: Likewise.
 	* testsuite/std/ranges/adaptors/95322.cc: Likewise.
 	* testsuite/std/ranges/adaptors/99433.cc: Likewise.
 	* testsuite/std/ranges/adaptors/all.cc: Likewise.
 	* testsuite/std/ranges/adaptors/common.cc: Likewise.
 	* testsuite/std/ranges/adaptors/conditionally_borrowed.cc:
 	Likewise.
 	* testsuite/std/ranges/adaptors/counted.cc: Likewise.
 	* testsuite/std/ranges/adaptors/detail/copyable_box.cc:
 	Likewise.
 	* testsuite/std/ranges/adaptors/drop.cc: Likewise.
 	* testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
 	* testsuite/std/ranges/adaptors/elements.cc: Likewise.
 	* testsuite/std/ranges/adaptors/filter.cc: Likewise.
 	* testsuite/std/ranges/adaptors/join.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lazy_split.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lazy_split_neg.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lwg3286.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lwg3313_neg.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lwg3325_neg.cc: Likewise.
 	* testsuite/std/ranges/adaptors/lwg3406.cc: Likewise.
 	* testsuite/std/ranges/adaptors/p1739.cc: Likewise.
 	* testsuite/std/ranges/adaptors/p2281.cc: Likewise.
 	* testsuite/std/ranges/adaptors/p2770r0.cc: Likewise.
 	* testsuite/std/ranges/adaptors/reverse.cc: Likewise.
 	* testsuite/std/ranges/adaptors/sizeof.cc: Likewise.
 	* testsuite/std/ranges/adaptors/split.cc: Likewise.
 	* testsuite/std/ranges/adaptors/take.cc: Likewise.
 	* testsuite/std/ranges/adaptors/take_while.cc: Likewise.
 	* testsuite/std/ranges/adaptors/transform.cc: Likewise.
 	* testsuite/std/ranges/empty_view.cc: Likewise.
 	* testsuite/std/ranges/headers/ranges/synopsis.cc: Likewise.
 	* testsuite/std/ranges/iota/difference_type.cc: Likewise.
 	* testsuite/std/ranges/iota/iota_view.cc: Likewise.
 	* testsuite/std/ranges/iota/iterator.cc: Likewise.
 	* testsuite/std/ranges/iota/lwg3292_neg.cc: Likewise.
 	* testsuite/std/ranges/iota/max_size_type.cc: Likewise.
 	* testsuite/std/ranges/istream_view.cc: Likewise.
 	* testsuite/std/ranges/p2259.cc: Likewise.
 	* testsuite/std/ranges/p2325.cc: Likewise.
 	* testsuite/std/ranges/p2367.cc: Likewise.
 	* testsuite/std/ranges/range.cc: Likewise.
 	* testsuite/std/ranges/refinements.cc: Likewise.
 	* testsuite/std/ranges/safe_range.cc: Likewise.
 	* testsuite/std/ranges/safe_range_types.cc: Likewise.
 	* testsuite/std/ranges/single_view.cc: Likewise.
 	* testsuite/std/ranges/sized.cc: Likewise.
 	* testsuite/std/ranges/subrange/1.cc: Likewise.
 	* testsuite/std/ranges/subrange/97512.cc: Likewise.
 	* testsuite/std/ranges/subrange/constexpr.cc: Likewise.
 	* testsuite/std/ranges/subrange/lwg3282_neg.cc: Likewise.
 	* testsuite/std/ranges/subrange/lwg3286.cc: Likewise.
 	* testsuite/std/ranges/subrange/lwg3433.cc: Likewise.
 	* testsuite/std/ranges/subrange/sizeof.cc: Likewise.
 	* testsuite/std/ranges/subrange/tuple_like.cc: Likewise.
 	* testsuite/std/ranges/view.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/21_strings/headers/cuchar/functions_std_cxx20.cc:
 	Remove dg-options.
 	* testsuite/23_containers/span/contiguous_range_neg.cc:
 	Likewise.
 	* testsuite/23_containers/span/everything.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/24_iterators/reverse_iterator/100639.cc: Remove
 	dg-options and add dg-add-options strict_std.
 	* testsuite/std/ranges/iota/93267.cc: Likewise.
 	* testsuite/std/ranges/iota/96042.cc: Likewise.
 	* testsuite/std/ranges/iota/size.cc: Likewise.
 	* testsuite/std/ranges/subrange/96042.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/tr1/5_numerical_facilities/special_functions/07_conf_hyperg/compile_cxx17.cc:
 	Replace dg-options -std=c++17 with dg-add-options strict_std.
 	* testsuite/tr1/5_numerical_facilities/special_functions/17_hyperg/compile_cxx17.cc:
 	Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/23_containers/deque/48101-2_neg.cc: Replace
 	dg-options with target selector.
 	* testsuite/23_containers/forward_list/48101-2_neg.cc: Likewise.
 	* testsuite/23_containers/list/48101-2_neg.cc: Likewise.
 	* testsuite/23_containers/map/48101-2_neg.cc: Likewise.
 	* testsuite/23_containers/map/48101_neg.cc: Likewise.
 	* testsuite/23_containers/multimap/48101-2_neg.cc: Likewise.
 	* testsuite/23_containers/multimap/48101_neg.cc: Likewise.
 	* testsuite/23_containers/multiset/48101-2_neg.cc: Likewise.
 	* testsuite/23_containers/set/48101-2_neg.cc: Likewise.
 	* testsuite/23_containers/unordered_map/48101-2_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multimap/48101-2_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_multiset/48101-2_neg.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_set/48101-2_neg.cc:
 	Likewise.
 	* testsuite/23_containers/vector/48101-2_neg.cc: Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/test.xml: Update documentation on running and
 	writing tests.
 	* doc/html/manual/test.html: Regenerate.
 	* testsuite/Makefile.am: Add v3-use-std-list to site.tmp
 	* testsuite/Makefile.in: Regenerate.
 	* testsuite/lib/dg-options.exp (add_options_for_strict_std): New
 	proc.
 	* testsuite/lib/libstdc++.exp (search_for): New utility proc.
 	(v3-dg-runtest): New proc to replace dg-runtest.
 	* testsuite/libstdc++-dg/conformance.exp: Use v3-dg-runtest.

 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.

 2023-09-15  Patrick Palka  <ppalka@redhat.com>

 	* include/std/bit: Include <concepts>.
 	(byteswap): Use a type-constraint instead of enable_if_t
 	inside the return type, and use std::integral.
 	(_If_is_unsigned_integer): Replace with ...
 	(__unsigned_integer): ... this.
 	(rotl): Use a type-constraint instead of enable_if_t inside
 	the return type.
 	(countl_zero): Likewise.
 	(countl_one): Likewise.
 	(countr_zero): Likewise.
 	(countr_one): Likewise.
 	(popcount): Likewise.
 	(has_single_bit): Likewise.
 	(bit_ceil): Likewise.
 	(bit_floor): Likewise.
 	(bit_width): Likewise.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/variant (variant): Remove derivation from
 	_Enable_default_constructor base class.
 	(variant::variant()): Constrain.
 	* testsuite/20_util/variant/default_ctor.cc: New test.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111172
 	* include/std/variant (get<T>): Remove !is_void static
 	assertions.

 2023-09-15  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (to_chars): Define new value for
 	C++26.
 	* include/bits/version.h: Regenerate.
 	* include/std/charconv (to_chars_result::operator bool): New
 	function.
 	(from_chars_result::operator bool): New function.
 	* testsuite/20_util/to_chars/version.cc: Update expected value.
 	* testsuite/20_util/from_chars/result.cc: New test.
 	* testsuite/20_util/to_chars/result.cc: New test.

 2023-09-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR c++/111357
 	* testsuite/20_util/integer_sequence/pr111357.cc: New test.

 2023-09-14  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/basic_filebuf/seekoff/char/1-io.cc: Use
 	dg-additional-files. Remove @require@ and @diff@ comments.
 	* testsuite/27_io/basic_filebuf/seekoff/char/2-io.cc: Likewise.
 	* testsuite/27_io/basic_filebuf/seekpos/char/1-io.cc: Likewise.
 	* testsuite/27_io/basic_filebuf/seekpos/char/2-io.cc: Likewise.
 	* testsuite/lib/dg-options.exp (v3_additional_files): New
 	global variable.
 	(dg-additional-files): New proc.
 	* testsuite/lib/libstdc++.exp (v3_target_compile): Copy
 	additional files to test directory.

 2023-09-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/io_context (io_context) [!_GLIBCXX_HAS_GTHREADS]:
 	Use a plain integer for _M_work_count for single-threaded
 	targets.
 	* include/experimental/memory_resource (__get_default_resource)
 	[!_GLIBCXX_HAS_GTHREADS]: Use unsynchronized type for
 	single-threaded targets.
 	* src/c++17/default_resource.h: Adjust preprocessor conditions
 	to match memory_resource.cc.
 	* src/c++17/memory_resource.cc [!_GLIBCXX_HAS_GTHREADS]
 	(atomic_mem_res): Use unsynchronized type for single-threaded
 	targets.

 2023-09-14  Christophe Lyon  <christophe.lyon@linaro.org>

 	* testsuite/29_atomics/atomic/compare_exchange_padding.cc: Likewise.
 	* testsuite/29_atomics/atomic/cons/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic_float/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic_integral/cons/value_init.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/compare_exchange_padding.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/generic.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/integral.cc: Likewise.
 	* testsuite/29_atomics/atomic_ref/pointer.cc: Likewise.

 2023-09-14  François Dumont  <fdumont@gcc.gnu.org>

 	* testsuite/19_diagnostics/stacktrace/synopsis.cc: Add
 	{ dg-require-normal-namespace "" }.

 2023-09-13  François Dumont  <fdumont@gcc.gnu.org>

 	* include/std/format (std::__format::_Arg_store): Explicit version
 	namespace on make_format_args friend declaration.

 2023-09-12  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/111327
 	* include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Also define
 	a deleted fallback operator() overload.  Constrain both the
 	enabled and deleted overloads accordingly.
 	* testsuite/20_util/function_objects/not_fn/111327.cc: New test.

 2023-09-12  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/111327
 	* include/std/functional (_Bind_front::operator()): Add deleted
 	fallback overloads for each const/ref qualifier pair.  Give the
 	enabled overloads dummy constraints to make each one more
 	specialized than the corresponding deleted overload.
 	* testsuite/20_util/function_objects/bind_front/111327.cc: New test.

 2023-09-12  Patrick Palka  <ppalka@redhat.com>

 	* include/std/functional (_Bind_front0): Remove.
 	(_Bind_front_t): Adjust.

 2023-09-12  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py: Reformat.
 	* python/libstdcxx/v6/xmethods.py: Likewise.

 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.

 2023-09-11  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.

 2023-09-11  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/bits/c++config (_GLIBCXX_HAS_BUILTIN): Do not undef.
 	(_GLIBCXX_USE_BUILTIN_TRAIT): Define.

 2023-09-11  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (__cpp_lib_formatters): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/stacktrace (formatter<stacktrace_entry>)
 	(formatter<basic_stacktrace<Alloc>>): Define.
 	* include/std/thread (formatter<thread::id, charT>): Define.
 	* testsuite/19_diagnostics/stacktrace/output.cc: New test.
 	* testsuite/19_diagnostics/stacktrace/synopsis.cc: Add
 	std::formatter specializations.
 	* testsuite/19_diagnostics/stacktrace/version.cc: Check
 	__cpp_lib_formatters macro.
 	* testsuite/30_threads/thread/id/hash.cc: Remove gthreads
 	dependency.
 	* testsuite/30_threads/thread/id/operators.cc: Likewise.
 	* testsuite/30_threads/thread/id/operators_c++20.cc: Likewise.
 	* testsuite/30_threads/thread/id/output.cc: New test.

 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.

 2023-09-08  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_CONFIGURE): Add c++23 directory.
 	* configure: Regenerate.
 	* doc/html/manual/*: Regenerate.
 	* doc/xml/manual/using.xml: Update documentation on linking.
 	* include/std/stacktrace: Remove declarations of libbacktrace
 	APIs.
 	(stacktrace_entry::_S_err_handler, stacktrace_entry::_S_init):
 	Remove.
 	(stacktrace_entry::_Info): New class.
 	(stacktrace_entry::_M_get_info): Use _Info.
 	(__stacktrace_impl): New class.
 	(basic_stacktrace): Derive from __stacktrace_impl.
 	(basic_stacktrace::current): Use __stacktrace_impl::_S_current.
 	* scripts/testsuite_flags.in: Adjust LDFLAGS to find
 	libstdc++exp instead of libstdc++_libbacktrace.
 	* src/Makefile.am (SUBDIRS): Add c++23 directory.
 	* src/Makefile.in: Regenerate.
 	* src/c++20/Makefile.am: Fix comment.
 	* src/c++20/Makefile.in: Regenerate.
 	* src/c++23/Makefile.am: New file.
 	* src/c++23/Makefile.in: New file.
 	* src/c++23/stacktrace.cc: New file with definitions of
 	stacktrace_entry::_Info and __stacktrace_impl members.
 	* src/experimental/Makefile.am: Use LIBADD to include other
 	libraries.
 	* src/experimental/Makefile.in: Regenerate.
 	* src/libbacktrace/Makefile.am: Use noinst_LTLIBRARIES.
 	* src/libbacktrace/Makefile.in: Regenerate.
 	* testsuite/19_diagnostics/stacktrace/current.cc: Adjust
 	dg-options to use -lstdc++exp.
 	* testsuite/19_diagnostics/stacktrace/entry.cc: Likewise.
 	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Likewise.
 	* testsuite/23_containers/vector/debug/assign4_backtrace_neg.cc:
 	Likewise.

 2023-09-08  Alexey Lapshin  <alexey.lapshin@espressif.com>

 	* src/libbacktrace/Makefile.am: Remove -Werror.
 	* src/libbacktrace/Makefile.in: Regenerate.

 2023-09-08  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/Makefile.am (check-DEJAGNU): Use @ in recipe.
 	* testsuite/Makefile.in: Regenerate.

 2023-09-08  Yang Yujie  <yangyujie@loongson.cn>

 	* configure.host: Register t-loongarch in tmake_file.
 	* config/cpu/loongarch/t-loongarch: New file.  Manually refresh
 	MULTISUBDIR with $(shell $(CXX) --print-multi-directory).

 2023-09-07  Bruno Victal  <mirai@makinata.eu>

 	* acinclude.m4: Update docbook xsl URI.
 	* configure: Regenerate.

 2023-09-07  Bruno Victal  <mirai@makinata.eu>

 	* doc/Makefile.am: Fix 'doc-install-info' rule.
 	Fix typo in commment.
 	* doc/Makefile.in: Regenerate.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/filesystem/path/concat/94063.cc: Simplify
 	dg-do target selector.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/config/default.exp: Remove trailing whitespace.
 	* testsuite/lib/dg-options.exp: Likewise.
 	* testsuite/lib/prune.exp: Likewise.
 	* testsuite/libstdc++-abi/abi.exp: Likewise.
 	* testsuite/libstdc++-dg/conformance.exp: Likewise.
 	* testsuite/libstdc++-prettyprinters/prettyprinters.exp:
 	Likewise.
 	* testsuite/libstdc++-xmethods/xmethods.exp: Likewise.
 	* testsuite/lib/libstdc++.exp: Likewise.
 	(check_v3_target_c_std): Fix filename for temporary source file.

 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.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Disable by default
 	for avr.
 	* configure: Regenerate.

 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.
 	* testsuite/std/time/parse.cc: Move dg-options before dg-do.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/ranges/access/cbegin.cc: Adjust for C++23
 	compatibility.
 	* testsuite/std/ranges/access/cdata.cc: Likewise.
 	* testsuite/std/ranges/access/cend.cc: Likewise.
 	* testsuite/std/ranges/access/crbegin.cc: Likewise.
 	* testsuite/std/ranges/access/crend.cc: Likewise.
 	* testsuite/std/ranges/adaptors/take.cc: Likewise.
 	* testsuite/std/ranges/adaptors/take_while.cc: Likewise.
 	* testsuite/std/ranges/adaptors/transform.cc: Likewise.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/iterator_concepts.h (__imove::iter_move): Define
 	poison pill as deleted for consistency.
 	(__access::begin): Replace with a single declaration.
 	* include/bits/ranges_base.h (__access::end, __access::rbegin)
 	(__access::rend, __access::size): Likewise.
 	* include/bits/version.def (ranges): Update value for C++23.
 	* include/bits/version.h: Regenerate.
 	* libsupc++/compare (__compare): Add missing poison pill
 	overloads.
 	* testsuite/std/ranges/version_c++23.cc: Adjust expected value
 	of __cpp_lib_ranges.
 	* testsuite/std/ranges/access/p2602.cc: New test.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/iterator_concepts.h (ranges::__cust_imove):
 	Rename to ranges::__imove.
 	(_IMove): Rename to _IterMove.
 	(ranges::__cust_iswap): Rename to ranges::__iswap.
 	(ranges::__cust): Rename to ranges::_Cpo.
 	(ranges::__cust_access): Rename to ranges::__access.
 	* include/bits/ranges_base.h (ranges::__cust_access): Rename to
 	ranges::__access.
 	(ranges::__cust): Rename to ranges::_Cpo.
 	* include/std/concepts (ranges::__cust_swap):  Rename to
 	ranges::__swap.
 	(ranges::__cust): Rename to ranges::_Cpo.
 	* libsupc++/compare (__cmp_cust): Rename to __compare.
 	(__cmp_algo): Rename to _Cpo.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (ranges): Update value.
 	* include/bits/version.h: Regenerate.
 	* include/std/ranges (__detail::__boxable): Use
 	move_constructible instead of copy_constructible for C++23.
 	(__detail::__box<T>): Adjust constraints for partial
 	specialization.
 	(single_view, transform_view): Use __box_constructible instead
 	of copy_constructible in constraints.
 	(zip_transform_view, adjacent_transform_view, repeat_view): Use
 	move_constructible instead of copy_constructible in constraints.
 	* testsuite/std/ranges/adaptors/adjacent_transform/1.cc: Check
 	construction from move-only argument.
 	* testsuite/std/ranges/adaptors/transform.cc: Likewise.
 	* testsuite/std/ranges/repeat/1.cc: Likewise.
 	* testsuite/std/ranges/single_view.cc: Likewise.
 	* testsuite/std/ranges/zip_transform/1.cc: Likewise.
 	* testsuite/std/ranges/version_c++23.cc: Adjust expected value
 	of __cpp_lib_ranges.

 2023-09-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/util/testsuite_iterators.h (is_customization_point_object):
 	Remove parameter name.

 2023-09-06  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Disable by default
 	for freestanding.
 	* configure: Regenerate.

 2023-09-04  Christophe Lyon  <christophe.lyon@linaro.org>

 	Revert
 	2023-09-04  Christophe Lyon  <christophe.lyon@linaro.org>

 	PR libstdc++/111238
 	* configure: Regenerate.
 	* configure.ac: Call GLIBCXX_CHECK_LINKER_FEATURES in cross,
 	non-Canadian builds.

 2023-09-04  Christophe Lyon  <christophe.lyon@linaro.org>

 	PR libstdc++/111238
 	* configure: Regenerate.
 	* configure.ac: Call GLIBCXX_CHECK_LINKER_FEATURES in cross,
 	non-Canadian builds.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/26_numerics/complex/literals/types.cc: Remove
 	dg-options and add target selector instead.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/tr1/6_containers/utility/pair.cc: Remove dg-options
 	and qualify ambiguous calls to get.
 	* testsuite/tr1/8_c_compatibility/cmath/pow_cmath.cc: Adjust
 	expected result for std::pow(float, int) as per DR 550.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/auto_ptr/1.cc: Remove dg-options -std=c++03
 	and add dg-warning for deprecation warnings.
 	* testsuite/20_util/auto_ptr/2.cc: Likewise.
 	* testsuite/20_util/auto_ptr/3.cc: Likewise.
 	* testsuite/20_util/auto_ptr/3946.cc: Likewise.
 	* testsuite/20_util/auto_ptr/4.cc: Likewise.
 	* testsuite/20_util/auto_ptr/5.cc: Likewise.
 	* testsuite/20_util/auto_ptr/6.cc: Likewise.
 	* testsuite/20_util/auto_ptr/7.cc: Likewise.
 	* testsuite/20_util/auto_ptr/assign_neg.cc: Likewise.
 	* testsuite/20_util/auto_ptr/requirements/explicit_instantiation/1.cc:
 	Likewise.
 	* testsuite/tr1/2_general_utilities/shared_ptr/assign/auto_ptr.cc:
 	Likewise.
 	* testsuite/tr1/2_general_utilities/shared_ptr/assign/auto_ptr_neg.cc:
 	Likewise.
 	* testsuite/tr1/2_general_utilities/shared_ptr/assign/auto_ptr_rvalue_neg.cc:
 	Likewise.
 	* testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 	Likewise.
 	* testsuite/tr1/2_general_utilities/shared_ptr/cons/auto_ptr.cc:
 	Likewise.
 	* testsuite/tr1/2_general_utilities/shared_ptr/cons/auto_ptr_neg.cc:
 	Likewise.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/26142
 	* testsuite/23_containers/vector/26412-1.cc: Moved to...
 	* testsuite/23_containers/vector/26142-1.cc: ...here.
 	* testsuite/23_containers/vector/26412-2.cc: Moved to...
 	* testsuite/23_containers/vector/26142-2.cc: ...here.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/bitset/107037.cc: Add c++98_only selector.
 	* testsuite/26_numerics/complex/56111.cc: Likewise.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/23_containers/deque/requirements/explicit_instantiation/2.cc:
 	Add dg-options to restrict the test to C++98 mode.
 	* testsuite/23_containers/list/requirements/explicit_instantiation/2.cc:
 	Likewise.

 2023-09-04  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/expected/bad.cc: Add missing target
 	selector.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Adjust
 	expected errors.
 	* testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
 	Likewise.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/filesystem/iterators/91067.cc: Add
 	-Wno-self-move to options.
 	* testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.

 2023-09-01  Vladimir Palevich  <palevichva@gmail.com>

 	PR libstdc++/110879
 	* include/bits/vector.tcc (_M_realloc_insert): End guard
 	lifetime just before assignment to class members.
 	(_M_default_append): Likewise.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++17/fs_ops.cc (fs::absolute) [FILESYSTEM_IS_WINDOWS]:
 	Use __resize_and_overwrite to fill buffer.
 	(fs::read_symlink) [HAVE_READLINK]: Likewise.
 	* src/filesystem/ops-common.h (get_temp_directory_from_env)
 	[FILESYSTEM_IS_WINDOWS]: Likewise.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111077
 	* include/bits/atomic_base.h (__atomic_impl::__compare_exchange):
 	Add _AtomicRef non-type template parameter and use a loop if it
 	is true.
 	(__atomic_impl::compare_exchange_weak): Add _AtomicRef NTTP.
 	(__atomic_impl::compare_exchange_strong): Likewise.
 	(atomic_ref::compare_exchange_weak): Use true for NTTP.
 	(atomic_ref::compare_exchange_strong): Use true for NTTP.
 	* testsuite/29_atomics/atomic_ref/compare_exchange_padding.cc:
 	Fix test to not rely on atomic_ref::load() to return an object
 	with padding preserved.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/filesystem/path/108636.cc: Add dg-require for
 	filesystem support.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (tzdb::current_zone): Check configure macros
 	for POSIX readlink before using filesystem::read_symlink.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Default to yes.
 	* configure: Regenerate.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (_Parser::operator()): Set failbit
 	early if invalid values are read when _M_need & _TimeOfDay is
 	non-zero.
 	* testsuite/std/time/parse.cc: Check that "25:59" cannot be
 	parsed for "%H:%M".

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/111162
 	* include/bits/chrono_io.h (_Parser::Operator()): Check %C
 	values are in range of year::min() to year::max().
 	* testsuite/std/time/parse.cc: Check out of range centuries.

 2023-09-01  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (__format::_Sink::_M_reset): Change second
 	argument from iterator to offset.

 2023-08-24  Paul Dreik  <gccpatches@pauldreik.se>

 	PR libstdc++/111102
 	* testsuite/std/format/string.cc: Check wide character format
 	strings with out-of-range widths.

 2023-08-24  Paul Dreik  <gccpatches@pauldreik.se>

 	PR libstdc++/111102
 	* include/std/format (__format::__parse_integer): Check for
 	non-null pointer.

 2023-08-24  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/format/functions/format_to.cc: Avoid warning for
 	unused variables.

 2023-08-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/atomic: Add comment to #ifdef and fix indentation.
 	* include/std/ostream: Check __glibcxx_syncbuf instead of
 	__cplusplus and _GLIBCXX_HOSTED.
 	* include/std/thread: Add comment to #ifdef.

 2023-08-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (__cpp_lib_ratio): Define.
 	* include/bits/version.h: Regenerate.
 	* include/std/ratio (quecto, ronto, yocto, zepto)
 	(zetta, yotta, ronna, quetta): Define.
 	* testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Adjust
 	dg-error line numbers.

 2023-08-24  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py (StdLocalePrinter): New
 	printer class.
 	* testsuite/libstdc++-prettyprinters/locale.cc: New test.

 2023-08-24  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110944
 	* python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Do
 	not show template arguments.
 	(StdVariantPrinter): Likewise.
 	* testsuite/libstdc++-prettyprinters/compat.cc: Adjust expected
 	output.
 	* testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
 	* testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.

 2023-08-23  François Dumont  <fdumont@gcc.gnu.org>

 	* testsuite/util/replacement_memory_operators.h
 	(counter::scope): New, capture and reset counter count at construction and
 	restore it at destruction.
 	(counter::check_new): Add scope instantiation.
 	* testsuite/23_containers/unordered_map/96088.cc (main):
 	Add counter::scope instantiation.
 	* testsuite/23_containers/unordered_multimap/96088.cc (main): Likewise.
 	* testsuite/23_containers/unordered_multiset/96088.cc (main): Likewise.
 	* testsuite/23_containers/unordered_set/96088.cc (main): Likewise.
 	* testsuite/ext/malloc_allocator/deallocate_local.cc (main): Likewise.
 	* testsuite/ext/new_allocator/deallocate_local.cc (main): Likewise.
 	* testsuite/ext/throw_allocator/deallocate_local.cc (main): Likewise.
 	* testsuite/ext/pool_allocator/allocate_chunk.cc (started): New global.
 	(operator new(size_t)): Check started.
 	(main): Set/Unset started.
 	* testsuite/17_intro/no_library_allocation.cc: New test case.

 2023-08-21  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/nested_exception/rethrow_if_nested-term.cc:
 	Call std::set_terminate before throwing the nested exception.

 2023-08-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR target/111060
 	* include/std/format (formatter): Only define specializations
 	for 16-bit floating-point types for C++23.
 	* include/std/limits (numeric_limits): Likewise.

 2023-08-18  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (operator<<): Make uses of wide
 	strings with streams and std::format type-dependent on _CharT.
 	* include/std/format [!_GLIBCXX_USE_WCHAR_T] Do not use
 	__to_wstring_numeric.

 2023-08-18  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (operator<<): Use __format_context.
 	* include/std/format (__format::__format_context): New alias
 	template.
 	[!_GLIBCXX_USE_WCHAR_T] (wformat_args, make_wformat_arg):
 	Disable.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	Revert:
 	2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* config/locale/generic/c_locale.cc (__convert_to_v): Reuse
 	double overload for long double if possible.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (tzdata_file, leaps_file): Change type to
 	std::string_view.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* config/locale/generic/c_locale.cc (__convert_to_v): Reuse
 	double overload for long double if possible.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++98/localename.cc (is_C_locale): New function.
 	(locale::locale(const char*)): Use is_C_locale.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110945
 	* include/bits/basic_string.h (basic_string::assign(Iter, Iter)):
 	Dispatch to _M_replace or move assignment from a temporary,
 	based on the iterator type.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (formatter): Add partial specializations
 	for extended floating-point types.
 	* testsuite/std/format/functions/format.cc: Move test_float128()
 	to ...
 	* testsuite/std/format/formatter/ext_float.cc: New test.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/c++config (__gnu_cxx::__bfloat16_t): Define
 	whenever __BFLT16_DIG__ is defined, not only for C++23.
 	* include/std/limits (numeric_limits<bfloat16_t>): Likewise.
 	(numeric_limits<_Float16>, numeric_limits<_Float32>)
 	(numeric_limits<_Float64>): Likewise for other extended
 	floating-point types.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (address_v4::to_string): Remove
 	unused parameter name.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* libsupc++/compare (__cmp_cat::__unseq): Make ctor consteval.
 	* testsuite/18_support/comparisons/categories/zero_neg.cc: Prune
 	excess errors caused by invalid consteval calls.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (__units_suffix_misc): Remove.
 	(__units_suffix): Return a known suffix as string view, do not
 	write unknown suffixes to a buffer.
 	(__fmt_units_suffix): New function that formats the suffix using
 	std::format_to.
 	(operator<<, __chrono_formatter::_M_q): Use __fmt_units_suffix.
 	(__chrono_formatter::_M_Z): Correct lifetime of wstring.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format [_GLIBCXX_USE_WCHAR_T]: Guard all wide
 	string formatters with this macro.
 	(__formatter_int::_M_format_int, __formatter_fp::format)
 	(formatter<const void*, C>::format): Use __to_wstring_numeric
 	instead of std::ctype::widen.
 	(__formatter_fp::_M_localize): Use hardcoded wchar_t values
 	instead of std::ctype::widen.
 	* testsuite/std/format/functions/format.cc: Add more checks for
 	wstring formatting of arithmetic types.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/basic_string.h (to_string(floating-point-type)):
 	Implement using std::to_chars for C++26.
 	* include/bits/version.def (__cpp_lib_to_string): Define.
 	* include/bits/version.h: Regenerate.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/dr1261.cc:
 	Adjust expected result in C++26 mode.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/to_string.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/dr1261.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/to_wstring.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/to_string_float.cc:
 	New test.
 	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/to_wstring_float.cc:
 	New test.
 	* testsuite/21_strings/basic_string/numeric_conversions/version.cc:
 	New test.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/basic_string.h (to_string(integral-type)): Use
 	resize_and_overwrite when available.
 	(__to_wstring_numeric): New helper functions.
 	(to_wstring): Use std::to_string then __to_wstring_numeric.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/to_string_int.cc:
 	Remove check for no excess capacity.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/basic_string.h (__resize_and_overwrite): New
 	function.
 	* include/bits/basic_string.tcc (__resize_and_overwrite): New
 	function.
 	(resize_and_overwrite): Simplify by using reserve instead of
 	growing the string manually. Adjust for C++11 compatibility.
 	* include/bits/cow_string.h (resize_and_overwrite): New
 	function.
 	(__resize_and_overwrite): New function.
 	* include/bits/version.def (__cpp_lib_string_resize_and_overwrite):
 	Do not depend on cxx11abi.
 	* include/bits/version.h: Regenerate.
 	* include/std/format (__formatter_fp::_S_resize_and_overwrite):
 	Remove.
 	(__formatter_fp::format, __formatter_fp::_M_localize): Use
 	__resize_and_overwrite instead of _S_resize_and_overwrite.
 	* testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 	Adjust for C++11 compatibility when included by ...
 	* testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite_ext.cc:
 	New test.

 2023-08-17  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/regex.h (regex_iterator::iterator_concept):
 	Define for C++20 as per P2770R0.
 	(regex_token_iterator::iterator_concept): Likewise.
 	* include/std/ranges (__detail::__as_lvalue): Define.
 	(join_view::_Iterator): Befriend join_view.
 	(join_view::_Iterator::_M_satisfy): Use _M_get_outer
 	instead of _M_outer.
 	(join_view::_Iterator::_M_get_outer): Define.
 	(join_view::_Iterator::_Iterator): Split constructor taking
 	_Parent argument into two as per P2770R0.  Remove constraint on
 	default constructor.
 	(join_view::_Iterator::_M_outer): Make this data member present
 	only when the underlying range is forward.
 	(join_view::_Iterator::operator++): Use _M_get_outer instead of
 	_M_outer.
 	(join_view::_Iterator::operator--): Use __as_lvalue helper.
 	(join_view::_Iterator::operator==): Adjust constraints as per
 	P2770R0.
 	(join_view::_Sentinel::__equal): Use _M_get_outer instead of
 	_M_outer.
 	(join_view::_M_outer): New data member when the underlying range
 	is non-forward.
 	(join_view::begin): Adjust definition as per P2770R0.
 	(join_view::end): Likewise.
 	(join_with_view::_M_outer_it): New data member when the
 	underlying range is non-forward.
 	(join_with_view::begin): Adjust definition as per P2770R0.
 	(join_with_view::end): Likewise.
 	(join_with_view::_Iterator::_M_outer_it): Make this data member
 	present only when the underlying range is forward.
 	(join_with_view::_Iterator::_M_get_outer): Define.
 	(join_with_view::_Iterator::_Iterator): Split constructor
 	taking _Parent argument into two as per P2770R0.  Remove
 	constraint on default constructor.
 	(join_with_view::_Iterator::_M_update_inner): Adjust definition
 	as per P2770R0.
 	(join_with_view::_Iterator::_M_get_inner): Likewise.
 	(join_with_view::_Iterator::_M_satisfy): Adjust calls to
 	_M_get_inner.  Use _M_get_outer instead of _M_outer_it.
 	(join_with_view::_Iterator::operator==): Adjust constraints
 	as per P2770R0.
 	(join_with_view::_Sentinel::operator==): Use _M_get_outer
 	instead of _M_outer_it.
 	* testsuite/std/ranges/adaptors/p2770r0.cc: New test.

 2023-08-17  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/108827
 	* include/std/ranges (__adaptor::_RangeAdaptorClosure):
 	Convert into a CRTP class template.  Move hidden operator|
 	friends into namespace scope and adjust their constraints.
 	(__closure::__is_range_adaptor_closure_fn): Define.
 	(__closure::__is_range_adaptor_closure): Define.
 	(__adaptor::_Partial): Adjust use of _RangeAdaptorClosure.
 	(__adaptor::_Pipe): Likewise.
 	(views::_All): Likewise.
 	(views::_Join): Likewise.
 	(views::_Common): Likewise.
 	(views::_Reverse): Likewise.
 	(views::_Elements): Likewise.
 	(views::_Adjacent): Likewise.
 	(views::_AsRvalue): Likewise.
 	(views::_Enumerate): Likewise.
 	(views::_AsConst): Likewise.
 	* testsuite/std/ranges/adaptors/all.cc: Reinstate assertion
 	expecting that adding empty range adaptor closure objects to a
 	pipeline doesn't increase the size of a pipeline.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (__format::_Pres_type): Add _Pres_F.
 	(__formatter_fp::parse): Use _Pres_F for 'F'.
 	(__formatter_fp::format): Set __upper for _Pres_F.
 	* testsuite/std/format/functions/format.cc: Check formatting of
 	infinity and NaN for each presentation type.

 2023-08-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/Makefile.in: Regenerate.

 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.

 2023-08-17  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.

 2023-08-16  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.

 2023-08-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/version.def (stds): Update value for C++23.
 	* include/bits/version.h: Regenerate.

 2023-08-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/25_algorithms/pstl/alg_sorting/set_difference.cc:
 	Fix name of upstream file this was derived from.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_intersection.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_symmetric_difference.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_union.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_util.h: Likewise.

 2023-08-16  Arsen Arsenović  <arsen@aarsen.me>

 	* libsupc++/typeinfo: Switch to bits/version.h for
 	__cpp_lib_constexpr_typeinfo.
 	* libsupc++/new: Switch to bits/version.h for
 	__cpp_lib_{launder,hardware_interference_size,destroying_delete}.
 	(launder): Guard behind __cpp_lib_launder.
 	(hardware_destructive_interference_size)
 	(hardware_constructive_interference_size): Guard behind
 	__cpp_lib_hardware_interference_size.
 	* libsupc++/exception: Switch to bits/version.h for
 	__cpp_lib_uncaught_exceptions.
 	(uncaught_exceptions): Guard behind __cpp_lib_uncaught_exceptions.
 	* libsupc++/compare: Switch to bits/version.h for
 	__cpp_lib_three_way_comparison.
 	(three_way_comparable, three_way_comparable_with)
 	(compare_three_way, weak_order, strong_order, partial_order):
 	Guard behind __cpp_lib_three_way_comparison >= 201907L.
 	* include/std/chrono: Drop __cpp_lib_chrono definition.
 	* include/std/vector: Switch to bits/version.h for
 	__cpp_lib_erase_if.
 	(erase, erase_if): Guard behind __cpp_lib_erase_if.
 	* include/std/variant: Switch to bits/version.h for
 	__cpp_lib_variant.  Guard whole header behind that FTM.
 	* include/std/utility: Switch to bits/version.h for
 	__cpp_lib_{exchange_function,constexpr_algorithms,as_const},
 	__cpp_lib_{integer_comparison_functions,to_underlying}, and
 	__cpp_lib_unreachable.
 	(exchange): Guard behind __cpp_lib_exchange_function.
 	(cmp_equal, cmp_not_equal, cmp_less, cmp_greater, cmp_less_equal)
 	(cmp_greater_equal, in_range): Guard behind
 	__cpp_lib_integer_comparison_functions.
 	(to_underlying): Guard behind __cpp_lib_to_underlying.
 	(unreachable): Guard behind __cpp_lib_unreachable.
 	* include/std/type_traits: Switch to bits/version.h for
 	__cpp_lib_is_{null_pointer,final,nothrow_convertible,aggregate},
 	__cpp_lib_is_{constant_evaluated,invocable,layout_compatible},
 	__cpp_lib_is_{pointer_interconvertible,scoped_enum,swappable},
 	__cpp_lib_{logical_traits,reference_from_temporary,remove_cvref},
 	__cpp_lib_{result_of_sfinae,transformation_trait_aliases},
 	__cpp_lib_{type_identity,type_trait_variable_templates},
 	__cpp_lib_{unwrap_ref,void_t,integral_constant_callable},
 	__cpp_lib_{bool_constant,bounded_array_traits}, and
 	__cpp_lib_has_unique_object_representations.
 	(integral_constant::operator()): Guard behind
 	__cpp_lib_integral_constant_callable.
 	(bool_constant): Guard behind __cpp_lib_bool_constant.
 	(conjunction, disjunction, negation, conjunction_v, disjunction_v)
 	(negation_v): Guard behind __cpp_lib_logical_traits.
 	(is_null_pointer): Guard behind __cpp_lib_is_null_pointer.
 	(is_final): Guard behind __cpp_lib_is_final.
 	(is_nothrow_convertible, is_nothrow_convertible_v): Guard behind
 	__cpp_lib_is_nothrow_convertible.
 	(remove_const_t, remove_volatile_t, remove_cv_t)
 	(add_const_t, add_volatile_t, add_cv_t): Guard behind
 	__cpp_lib_transformation_trait_aliases.
 	(void_t): Guard behind __cpp_lib_void_t.
 	(is_swappable_with_v, is_nothrow_swappable_with_v)
 	(is_swappable_with, is_nothrow_swappable_with): Guard behind
 	__cpp_lib_is_swappable.
 	(is_nothrow_invocable_r, is_invocable_r, invoke_result)
 	(is_invocable, invoke_result_t): Guard behind
 	__cpp_lib_is_invocable.
 	(alignment_of_v, extent_v, has_virtual_destructor_v)
 	(is_abstract_v, is_arithmetic_v, is_array_v)
 	(is_assignable_v, is_base_of_v, is_class_v, is_compound_v)
 	(is_constructible_v, is_const_v, is_convertible_v)
 	(is_copy_assignable_v, is_copy_constructible_v)
 	(is_default_constructible_v, is_destructible_v)
 	(is_empty_v, is_enum_v, is_final_v, is_floating_point_v)
 	(is_function_v, is_fundamental_v, is_integral_v)
 	(is_invocable_r_v, is_invocable_v, is_literal_type_v)
 	(is_lvalue_reference_v, is_member_function_pointer_v)
 	(is_member_object_pointer_v, is_member_pointer_v)
 	(is_move_assignable_v, is_move_constructible_v)
 	(is_nothrow_assignable_v, is_nothrow_constructible_v)
 	(is_nothrow_copy_assignable_v, is_nothrow_copy_constructible_v)
 	(is_nothrow_default_constructible_v, is_nothrow_destructible_v)
 	(is_nothrow_invocable_r_v, is_nothrow_invocable_v)
 	(is_nothrow_move_assignable_v, is_nothrow_move_constructible_v)
 	(is_null_pointer_v, is_object_v, is_pod_v, is_pointer_v)
 	(is_polymorphic_v, is_reference_v, is_rvalue_reference_v)
 	(is_same_v, is_scalar_v, is_signed_v, is_standard_layout_v)
 	(is_trivially_assignable_v, is_trivially_constructible_v)
 	(is_trivially_copyable_v, is_trivially_copy_assignable_v)
 	(is_trivially_copy_constructible_v)
 	(is_trivially_default_constructible_v)
 	(is_trivially_destructible_v, is_trivially_move_assignable_v)
 	(is_trivially_move_constructible_v, is_trivial_v, is_union_v)
 	(is_unsigned_v, is_void_v, is_volatile_v, rank_v, as variadic):
 	Guard behind __cpp_lib_type_trait_variable_templates.
 	(has_unique_object_representations)
 	(has_unique_object_representations_v): Guard behind
 	__cpp_lib_has_unique_object_representation.
 	(is_aggregate): Guard behind __cpp_lib_is_aggregate.
 	(remove_cvref, remove_cvref_t): Guard behind
 	__cpp_lib_remove_cvref.
 	(type_identity, type_identity_t): Guard behind
 	__cpp_lib_type_identity.
 	(unwrap_reference, unwrap_reference_t, unwrap_ref_decay)
 	(unwrap_ref_decay_t): Guard behind __cpp_lib_unwrap_ref.
 	(is_bounded_array_v, is_unbounded_array_v, is_bounded_array)
 	(is_unbounded_array): Guard behind __cpp_lib_bounded_array_traits.
 	(is_scoped_enum, is_scoped_enum_v): Guard behind
 	__cpp_lib_is_scoped_enum.
 	(reference_constructs_from_temporary)
 	(reference_constructs_from_temporary_v): Guard behind
 	__cpp_lib_reference_from_temporary.
 	* include/std/tuple: Switch to bits/version.h for
 	__cpp_lib_{constexpr_tuple,tuple_by_type,apply_make_from_tuple}.
 	(get<T>): Guard behind __cpp_lib_tuple_by_type.
 	(apply): Guard behind __cpp_lib_apply.
 	(make_from_tuple): Guard behind __cpp_lib_make_from_tuple.
 	* include/std/syncstream: Switch to bits/version.h for
 	__cpp_lib_syncbuf.  Guard header behind that FTM.
 	* include/std/string_view: Switch to bits/version.h for
 	__cpp_lib_{string_{view,contains},constexpr_string_view} and
 	__cpp_lib_starts_ends_with.
 	(basic_string_view::starts_with, basic_string_view::ends_with):
 	Guard behind __cpp_lib_starts_ends_with.
 	[C++23 && _GLIBCXX_HOSTED && !defined(__cpp_lib_string_contains)]:
 	Assert as impossible ithout a bug in C++23.
 	* include/std/string: Switch to bits/version.h for
 	__cpp_lib_erase_if.
 	(erase, erase_if): Guard behind __cpp_lib_erase_if.
 	* include/std/thread: Switch to bits/version.h for
 	__cpp_lib_jthread.
 	* include/std/stop_token: Switch to bits/version.h for
 	__cpp_lib_jthread.
 	* include/std/spanstream: Switch to bits/version.h for
 	__cpp_lib_spanstream.  Guard header behind that FTM.
 	* include/std/span: Switch to bits/version.h for __cpp_lib_span.
 	Guard header behind that FTM.
 	* include/std/source_location: Switch to bits/version.h for
 	__cpp_lib_source_location.  Guard header with that FTM.
 	* include/std/shared_mutex: Switch to bits/version.h for
 	__cpp_lib_shared{,_timed}_mutex.
 	(shared_mutex): Guard behind __cpp_lib_shared_mutex.
 	* include/std/semaphore: Switch to bits/version.h for
 	__cpp_lib_semaphore.  Guard header behind that FTM.
 	* include/std/ranges: Switch to bits/version.h for
 	__cpp_lib_ranges_{zip,chunk{,_by},slide,join_with},
 	__cpp_lib_ranges_{repeat_stride,cartesian_product,as_rvalue},
 	and __cpp_lib_ranges_{as_const,enumerate,iota}.
 	(ranges::zip et al, ranges::chunk et al, ranges::slide et al)
 	(ranges::chunk_by et al, ranges::join_with et al)
 	(ranges::stride et al, ranges::cartesian_product et al)
 	(ranges::as_rvalue et al, ranges::as_const et al)
 	(ranges::enumerate et al): Guard behind appropriate FTM.
 	* include/std/optional: Switch to bits/version.h for
 	__cpp_lib_optional.  Guard header behind that FTM.
 	* include/std/numeric: Switch to bits/version.h for
 	__cpp_lib_{gcd{,_lcm},lcm,constexpr_numeric,interpolate}
 	and __cpp_lib_parallel_algorithm.
 	(gcd, lcm): Guard behind __cpp_lib_gcd_lcm.
 	(midpoint): Guard behind __cpp_lib_interpolate.
 	* include/std/numbers: Switch to bits/version.h for
 	__cpp_lib_math_constants.  Guard header behind that FTM.
 	* include/std/mutex: Switch to bits/version.h for
 	__cpp_lib_scoped_lock.
 	(scoped_Lock): Guard behind __cpp_lib_scoped_lock.
 	* include/std/memory_resource: Switch to bits/version.h for
 	__cpp_lib_{polymorphic_allocator,memory_resource}.
 	(synchronized_pool_resource): Guard behind
 	__cpp_lib_memory_resource >= 201603L.
 	(polymorphic_allocator): Guard behind
 	__cpp_lib_polymorphic_allocator.
 	* include/std/memory: Switch to bits/version.h for
 	__cpp_lib_{parallel_algorithm,atomic_value_initialization}.
 	* include/std/list: Switch to bits/version.h for
 	__cpp_lib_erase_if.
 	(erase, erase_if): Guard behind __cpp_lib_erase_if.
 	* include/std/latch: Switch to bits/version.h for __cpp_lib_latch.
 	Guard header behind that FTM.
 	* include/std/iterator: Switch to bits/version.h for
 	__cpp_lib_null_iterators.
 	* include/std/iomanip: Switch to bits/version.h for
 	__cpp_lib_quoted_string_io.
 	(quoted): Guard behind __cpp_lib_quoted_string_io.
 	* include/std/functional: Switch to bits/version.h for
 	__cpp_lib_{invoke{,_r},constexpr_functional,bind_front} and
 	__cpp_lib_{not_fn,booyer_moore_searcher}.
 	(invoke): Guard behind __cpp_lib_invoke.
 	(invoke_r): Guard behind __cpp_lib_invoke_r.
 	(bind_front): Guard behind __cpp_lib_bind_front.
 	(not_fn): Guard behind __cpp_lib_not_fn.
 	(boyer_moore_searcher, boyer_moore_horspool_searcher): Guard
 	definition behind __cpp_lib_boyer_moore_searcher.
 	* include/std/forward_list: Switch to bits/version.h for
 	__cpp_lib_erase_if.
 	(erase, erase_if): Guard behind __cpp_lib_erase_if.
 	* include/std/format: Switch to bits/version.h for
 	__cpp_lib_format.  Guard header behind that FTM.
 	* include/std/filesystem: Switch to bits/version.h for
 	__cpp_lib_filesystem.  Guard header behind that FTM.
 	* include/std/expected: Switch to bits/version.h for
 	__cpp_lib_expected.  Guard header behind it.
 	* include/std/execution: Switch to bits/version.h for
 	__cpp_lib_{execution,parallel_algorithm}.  Guard header behind
 	either.
 	* include/std/deque: Switch to bits/version.h for
 	__cpp_lib_erase_if.
 	(erase, erase_if): Guard behind __cpp_lib_erase_if.
 	* include/std/coroutine: Switch to bits/version.h for
 	__cpp_lib_coroutine.  Guard header behind that FTM.
 	* include/std/concepts: Switch to bits/version.h for
 	__cpp_lib_concepts.  Guard header behind that FTM.
 	* include/std/complex: Switch to bits/version.h for
 	__cpp_lib_{complex_udls,constexpr_complex}.
 	(operator""if, operator""i, operator""il): Guard behind
 	__cpp_lib_complex_udls.
 	* include/std/charconv: Swtich to bits/version.h for
 	__cpp_lib_{to_chars,constexpr_charconv}.
 	* include/std/bitset: Switch to bits/version.h for
 	__cpp_lib_constexpr_bitset.
 	* include/std/bit: Switch to bits/version.h for
 	__cpp_lib_{bit_cast,byteswap,bitops,int_pow2,endian}.
 	(bit_cast): Guard behind __cpp_lib_bit_cast.
 	(byteswap): Guard behind __cpp_lib_byteswap.
 	(rotl, rotr, countl_zero, countl_one, countr_zero, countr_one)
 	(popcount): Guard behind __cpp_lib_bitops.
 	(has_single_bit, bit_ceil, bit_floor, bit_width): Guard behind
 	__cpp_lib_int_pow2.
 	(endian): Guard behind __cpp_lib_endian.
 	* include/std/barrier: Switch to bits/version.h for
 	__cpp_lib_barrier.  Guard header behind that FTM.
 	* include/std/atomic: Switch to bits/version.h for
 	__cpp_lib_atomic_{is_always_lock_free,float,ref}
 	and __cpp_lib_lock_free_type_aliases.
 	(*::is_always_lock_free): Guard behind
 	__cpp_lib_atomic_is_always_lock_free.
 	(atomic<float>): Guard behind __cpp_lib_atomic_float.
 	(atomic_ref): Guard behind __cpp_lib_atomic_ref.
 	(atomic_signed_lock_free, atomic_unsigned_lock_free): Guard behind
 	__cpp_lib_atomic_lock_free_type_aliases.
 	* include/std/array: Switch to bits/version.h for
 	__cpp_lib_to_array.
 	(to_array): Guard behind __cpp_lib_to_array.
 	* include/std/any: Switch to bits/version.h for __cpp_lib_any.
 	Guard header behind that FTM.
 	* include/std/algorithm: Switch to bits/version.h for
 	__cpp_lib_parallel_algorithm.
 	* include/c_global/cstddef: Switch to bits/version.h for
 	__cpp_lib_byte.
 	(byte): Guard behind __cpp_lib_byte.
 	* include/c_global/cmath: Switch to bits/version.h for
 	__cpp_lib_{hypot,interpolate}.
 	(hypot3): Guard behind __cpp_lib_hypot.
 	(lerp): Guard behind __cpp_lib_interpolate.
 	* include/c_compatibility/stdatomic.h: Switch to
 	bits/stl_version.h for __cpp_lib_atomic.  Guard header behind that
 	FTM.
 	* include/bits/utility.h: Switch to bits/version.h for
 	__cpp_lib_{tuple_element_t,integer_sequence,ranges_zip}.
 	(tuple_element_t): Guard behind __cpp_lib_tuple_element_t.
 	(integer_sequence et al): Guard behind __cpp_lib_integer_sequence.
 	* include/bits/uses_allocator_args.h: Switch to bits/version.h for
 	__cpp_lib_make_obj_using_allocator.  Guard header behind that FTM.
 	* include/bits/unordered_map.h: Switch to bits/version.h for
 	__cpp_lib_unordered_map_try_emplace.
 	(try_emplace): Guard behind __cpp_lib_unordered_map_try_emplace.
 	* include/bits/unique_ptr.h: Switch to bits/version.h for
 	__cpp_lib_{constexpr_memory,make_unique}.
 	(make_unique): Guard behind __cpp_lib_make_unique.
 	* include/bits/stl_vector.h: Switch to bits/version.h for
 	__cpp_lib_constexpr_vector.
 	* include/bits/stl_uninitialized.h: Switch to bits/version.h for
 	__cpp_lib_raw_memory_algorithms.
 	(uninitialized_default_construct)
 	(uninitialized_default_construct_n, uninitialized_move)
 	(uninitialized_move_n, uninitialized_value_construct)
 	(uninitialized_value_construct_n): Guard behind
 	__cpp_lib_raw_memory_algorithms.
 	* include/bits/stl_tree.h: Switch to bits/version.h for
 	__cpp_lib_generic_associative_lookup.
 	* include/bits/stl_stack.h: Switch to bits/version.h for
 	__cpp_lib_adaptor_iterator_pair_constructor.
 	(stack): Guard iterator-pair constructor behind
 	__cpp_lib_adaptor_iterator_pair_constructor.
 	* include/bits/stl_queue.h: Switch to bits/version.h for
 	__cpp_lib_adaptor_iterator_pair_constructor.
 	(queue): Guard iterator-pair constructor behind
 	__cpp_lib_adaptor_iterator_pair_constructor.
 	* include/bits/stl_pair.h: Switch to bits/version.h for
 	__cpp_lib_{concepts,tuples_by_type}.
 	(get): Guard type-getting overloads behind
 	__cpp_lib_tuples_by_type.
 	* include/bits/stl_map.h: Switch to bits/version.h for
 	__cpp_lib_map_try_emplace.
 	(map<>::try_emplace): Guard behind __cpp_lib_map_try_emplace.
 	* include/bits/stl_list.h: Switch to bits/version.h for
 	__cpp_lib_list_remove_return_type.
 	(__remove_return_type, _GLIBCXX_LIST_REMOVE_RETURN_TYPE_TAG)
 	[C++20]: guard behind __cpp_lib_list_remove_return_type instead.
 	* include/bits/stl_iterator.h: Switch to bits/version.h for
 	__cpp_lib_{constexpr_iterator,array_constexpr} and
 	__cpp_lib_{make_reverse_iterator,move_iterator_concept}.
 	(make_reverse_iterator): Guard behind
 	__cpp_lib_make_reverse_iterator.
 	(iterator_concept et al): Guard __cpp_lib_move_iterator_concept
 	changes behind that FTM.
 	* include/bits/stl_function.h: Switch to bits/version.h for
 	__cpp_lib_transparent_operators.
 	(equal_to, not_equal_to, greater, less, greater_equal)
 	(less_equal, bit_and, bit_or, bit_xor, bit_not, logical_and)
 	(logical_or, logical_not, plus, minus, multiplies, divides)
 	(modulus, negate): Guard '= void' fwdecls behind
 	__cpp_lib_transparent_operators.
 	(plus<void>, minus<void>, multiplies<void>, divides<void>)
 	(modulus<void>, negate<void>, logical_and<void>, logical_or<void>)
 	(logical_not<void>, bit_and<void>, bit_or<void>, bit_xor<void>)
 	(equal_to<void>, not_equal_to<void>, greater<void>, less<void>)
 	(greater_equal<void>, less_equal<void>, bit_not<void>)
 	(__has_is_transparent): Guard behind
 	__cpp_lib_transparent_operators.
 	* include/bits/stl_algobase.h: Switch to bits/version.h for
 	__cpp_lib_robust_nonmodifying_seq_ops.
 	(robust equal, mismatch): Guard behind
 	__cpp_lib_nonmember_container_access.
 	* include/bits/stl_algo.h: Swtich to bits/version.h for
 	__cpp_lib_{clamp,sample}.
 	(clamp): Guard behind __cpp_lib_clamp.
 	(sample): Guard behind __cpp_lib_sample.
 	* include/bits/specfun.h: Switch to bits/version.h for
 	__cpp_lib_math_special_functions and __STDCPP_MATH_SPEC_FUNCS__.
 	* include/bits/shared_ptr_base.h: Switch to bits/version.h for
 	__cpp_lib_{smart_ptr_for_overwrite,shared_ptr_arrays}.
 	(_Sp_overwrite_tag): Guard behind
 	__cpp_lib_smart_ptr_for_overwrite.
 	* include/bits/shared_ptr_atomic.h: Switch to bits/version.h for
 	__cpp_lib_atomic_shared_ptr.
 	* include/bits/shared_ptr.h: Switch to bits/version.h for
 	__cpp_lib_{enable_shared_from_this,shared_ptr_weak_type}.
 	(shared_ptr<T>::weak_type): Guard behind
 	__cpp_lib_shared_ptr_weak_type.
 	(enable_shared_from_this<T>::weak_from_this): Guard behind
 	__cpp_lib_enable_shared_from_this.
 	* include/bits/ranges_cmp.h: Switch to bits/version.h for
 	__cpp_lib_ranges.
 	* include/bits/ranges_algo.h: Switch to bits/version.h for
 	__cpp_lib_{shift,ranges_{contains,find_last,fold,iota}}.
 	* include/bits/range_access.h: Switch to bits/version.h for
 	__cpp_lib_nonmember_container_access
 	(size, empty, data): Guard behind
 	__cpp_lib_nonmember_container_access.
 	(ssize): Guard behind __cpp_lib_ssize.
 	* include/bits/ptr_traits.h: Switch to bits/version.h. for
 	__cpp_lib_{constexpr_memory,to_address}.
 	(to_address): Guard behind __cpp_lib_to_address.
 	* include/bits/node_handle.h: Switch to bits/version.h for
 	__cpp_lib_node_extract.  Guard header behind that FTM.
 	* include/bits/move_only_function.h: Switch to bits/version.h for
 	__cpp_lib_move_only_function.  Guard header behind that FTM.
 	* include/bits/move.h: Switch to bits/version.h for
 	__cpp_lib_addressof_constexpr.
 	* include/bits/ios_base.h: Switch to bits/version.h for
 	__cpp_lib_ios_noreplace.
 	(noreplace): Guard with __cpp_lib_ios_noreplace.
 	* include/bits/hashtable.h: Switch to bits/version.h for
 	__cpp_lib_generic_unordered_lookup.
 	(_M_equal_range_tr, _M_count_tr, _M_find_tr): Guard behind
 	__cpp_lib_generic_unordered_lookup.
 	* include/bits/forward_list.h: Switch to bits/version.h for
 	__cpp_lib_list_remove_return_type.
 	(__remove_return_type): Guard behind
 	__cpp_lib_list_remove_return_type.
 	* include/bits/erase_if.h: Switch to bits/version.h for
 	__cpp_lib_erase_if.
 	* include/bits/cow_string.h: Switch to bits/version.h for
 	__cpp_lib_constexpr_string.
 	* include/bits/chrono.h: Swtich to bits/version.h for
 	__cpp_lib_chrono{,_udls}.
 	(ceil): Guard behind __cpp_lib_chrono.
 	(operator""ns et al): Guard behind __cpp_lib_chrono_udls.
 	* include/bits/char_traits.h: Switch to bits/version.h for
 	__cpp_lib_constexpr_char_traits.
 	* include/bits/basic_string.h: Switch to bits/version.h for
 	__cpp_lib_{constexpr_string,string_{resize_and_overwrite,udls}}.
 	(resize_and_overwrite): Guard behind
 	__cpp_lib_string_resize_and_overwrite.
 	(operator""s): Guard behind __cpp_lib_string_udls.
 	* include/bits/atomic_wait.h: Switch to bits/version.h for
 	__cpp_lib_atomic_wait.  Guard header behind that FTM.
 	* include/bits/atomic_base.h: Switch to bits/version.h for
 	__cpp_lib_atomic_value_initialization and
 	__cpp_lib_atomic_flag_test.
 	(atomic_flag::test): Guard behind __cpp_lib_atomic_flag_test,
 	rather than C++20.
 	* include/bits/allocator.h: Switch to bits/version.h for
 	__cpp_lib_incomplete_container_elements.
 	* include/bits/alloc_traits.h: Switch to using bits/version.h for
 	__cpp_lib_constexpr_dynamic_alloc and
 	__cpp_lib_allocator_traits_is_always_equal.
 	* include/bits/align.h: Switch to bits/version.h for defining
 	__cpp_lib_assume_aligned.
 	(assume_aligned): Guard with __cpp_lib_assume_aligned.
 	* include/bits/algorithmfwd.h: Switch to bits/version.h for
 	defining __cpp_lib_constexpr_algorithms.
 	* include/std/stacktrace: Switch to bits/version.h for
 	__cpp_lib_stacktrace.  Guard header behind that FTM.
 	* testsuite/23_containers/array/tuple_interface/get_neg.cc:
 	Update line numbers.

 2023-08-16  Arsen Arsenović  <arsen@aarsen.me>

 	* include/Makefile.am (bits_freestanding): Add version.h.
 	(allcreated): Add version.h.
 	(${bits_srcdir}/version.h): New rule.  Regenerates
 	version.h out of version.{def,tpl}.
 	* include/Makefile.in: Regenerate.
 	* include/bits/version.def: New file.  Declares a list of
 	all feature test macros, their values and their preconditions.
 	* include/bits/version.tpl: New file.  Turns version.def
 	into a sequence of #if blocks.
 	* include/bits/version.h: New file.  Generated from
 	version.def.
 	* include/std/version: Replace with a __glibcxx_want_all define
 	and bits/version.h include.

 2023-08-14  Paul Dreik  <gccpatches@pauldreik.se>

 	PR libstdc++/110860
 	* include/std/format (__formatter_fp::format): Use frexp instead
 	of log10.

 2023-08-12  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (true_type): Use __bool_constant
 	instead.
 	(false_type): Likewise.
 	(bool_constant): Likewise.

 2023-08-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110990
 	* include/std/format (_Seq_sink::get): Only call _M_overflow if
 	its precondition is met.
 	(_Iter_sink::_M_finish): Likewise.
 	(_Iter_sink<C, ContigIter>::_M_overflow): Only switch to the
 	internal buffer after running out of space.
 	(_Iter_sink<C, ContigIter>::_M_finish): Do not use _M_overflow.
 	(_Counting_sink::count): Likewise.
 	* testsuite/std/format/functions/format_to_n.cc: Check cases
 	where the output fits into the buffer.

 2023-08-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/104167
 	* include/bits/chrono_io.h (operator|=, operator|): Add noexcept
 	to _ChronoParts operators.
 	(from_stream, parse): Define new functions.
 	(__detail::_Parse, __detail::_Parser): New class templates.
 	* include/std/chrono (__cpp_lib_chrono): Define to 201907L for
 	C++20.
 	* include/std/version (__cpp_lib_chrono): Likewise.
 	* testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
 	Adjust expected value of feature test macro.
 	* testsuite/20_util/duration/io.cc: Test parsing.
 	* testsuite/std/time/clock/file/io.cc: Likewise.
 	* testsuite/std/time/clock/gps/io.cc: Likewise.
 	* testsuite/std/time/clock/system/io.cc: Likewise.
 	* testsuite/std/time/clock/tai/io.cc: Likewise.
 	* testsuite/std/time/clock/utc/io.cc: Likewise.
 	* testsuite/std/time/day/io.cc: Likewise.
 	* testsuite/std/time/month/io.cc: Likewise.
 	* testsuite/std/time/month_day/io.cc: Likewise.
 	* testsuite/std/time/weekday/io.cc: Likewise.
 	* testsuite/std/time/year/io.cc: Likewise.
 	* testsuite/std/time/year_month/io.cc: Likewise.
 	* testsuite/std/time/year_month_day/io.cc: Likewise.
 	* testsuite/std/time/syn_c++20.cc: Check value of macro and for
 	the existence of parse and from_stream in namespace chrono.
 	* testsuite/std/time/clock/local/io.cc: New test.
 	* testsuite/std/time/parse.cc: New test.

 2023-08-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110860
 	* include/std/format (__formatter_fp::format): Do not call log10
 	with zero values.

 2023-08-11  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py (StdChronoCalendarPrinter):
 	Check for out-of-range month an weekday indices.
 	* testsuite/libstdc++-prettyprinters/chrono.cc: Check invalid
 	month and weekday values.

 2023-08-11  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/stl_iterator.h (__clamped_iter_cat_t): Remove.

 2023-08-10  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110974
 	* include/std/format (_Spec::_S_parse_width_or_precision): Check
 	for empty range before dereferencing iterator.
 	* testsuite/std/format/string.cc: Check for expected exception.
 	Fix expected exception message in test_pr110862() and actually
 	call it.

 2023-08-10  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110968
 	* include/std/format (__formatter_fp::format): Check return
 	value of _M_localize.
 	* testsuite/std/format/functions/format.cc: Check classic
 	locale.

 2023-08-10  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110970
 	* include/bits/stl_iterator.h (__detail::__move_iter_cat): Use
 	__iter_category_t.
 	(iterator_traits<common_iterator<I, S>>::_S_iter_cat): Likewise.
 	(__detail::__basic_const_iterator_iter_cat): Likewise.
 	* include/bits/stl_iterator_base_types.h (__iterator_category_t):
 	Rename to __iter_category_t.

 2023-08-09  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono.h (duration_cast): Do not use braces
 	around statements for C++11 constexpr rules.
 	* include/bits/stl_algobase.h (__lg): Rewrite as a single
 	statement for C++11 constexpr rules.
 	* include/experimental/bits/fs_path.h (path::string): Use
 	_GLIBCXX17_CONSTEXPR not _GLIBCXX_CONSTEXPR for 'if constexpr'.
 	* include/std/charconv (__to_chars_8): Initialize variable for
 	C++17 constexpr rules.

 2023-08-09  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/list.tcc (list::sort(Cmp)): Fix -Wsign-compare
 	warning for loop condition.

 2023-08-09  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/complex: Add diagnostic pragma for clang.

 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.

 2023-08-09  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.

 2023-08-09  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.

 2023-08-09  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format: Fix some warnings.
 	(__format::__write(Ctx&, basic_string_view<CharT>)): Remove
 	unused function template.

 2023-08-07  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110860
 	* include/std/format (__formatter_fp::format): Do not use
 	__builtin_abs and __builtin_log10 with arbitrary floating-point
 	types.

 2023-08-07  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110917
 	* include/std/format (__format::_Iter_sink<CharT, OutIter>):
 	Constrain partial specialization for contiguous iterators to
 	require the value type to be CharT.
 	* testsuite/std/format/functions/format_to.cc: New test.

 2023-08-07  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110862
 	* include/std/format (_Scanner::_M_on_replacement_field):
 	Check for expected '}' before incrementing iterator.
 	* testsuite/std/format/string.cc: Check "{0:{0}" format string.

 2023-08-07  Nick Alcock  <nick.alcock@oracle.com>

 	* configure: Regenerate.

 2023-08-07  Alan Modra  <amodra@gmail.com>

 	* configure: Regenerate.

 2023-08-07  Alexander von Gluck IV  <kallisti5@unixzen.com>

 	* configure: Regenerate.

 2023-08-07  Nick Alcock  <nick.alcock@oracle.com>

 	* configure: Regenerate.

 2023-08-07  Nick Alcock  <nick.alcock@oracle.com>

 	* configure: Regenerate.

 2023-08-07  H.J. Lu  <hjl.tools@gmail.com>

 	* configure: Regenerate.

 2023-08-07  H.J. Lu  <hjl.tools@gmail.com>

 	* configure: Regenerate.

 2023-08-06  François Dumont  <fdumont@gcc.gnu.org>

 	* config/abi/pre/gnu-versioned-namespace.ver: Add __cxa_call_terminate
 	symbol export.

 2023-07-30  François Dumont  <fdumont@gcc.gnu.org>

 	* src/c++11/compatibility-ldbl-facets-aliases.h: Replace #define with
 	proper #error.
 	* src/c++11/locale-inst-monetary.h: Likewise.
 	* src/c++11/locale-inst-numeric.h: Likewise.

 2023-07-27  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108046
 	* include/std/format (__formatter_fp::format): Ensure __expc is
 	always set for all presentation types. Set __z correctly for
 	zero precision.
 	* testsuite/std/format/functions/format.cc: Check problem cases.

 2023-07-26  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110807
 	* testsuite/23_containers/vector/bool/110807.cc: Require c++11.

 2023-07-26  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110807
 	* include/bits/stl_bvector.h (vector(const vector&)): Access
 	iterators before allocating.
 	* include/bits/vector.tcc (vector<bool>::_M_insert_range):
 	Likewise.
 	* testsuite/23_containers/vector/bool/110807.cc: New test.

 2023-07-26  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/algorithmfwd.h (random_shuffle): Add deprecated
 	attribute.
 	* include/bits/stl_algo.h (random_shuffle): Correct comments.
 	* testsuite/25_algorithms/random_shuffle/1.cc: Disable
 	deprecated warnings.
 	* testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
 	* testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
 	* testsuite/25_algorithms/random_shuffle/deprecated.cc: New
 	test.

 2023-07-26  Nathaniel Shead  <nathanieloshead@gmail.com>

 	* testsuite/25_algorithms/equal/constexpr_neg.cc: Update diagnostic
 	locations.
 	* testsuite/26_numerics/gcd/105844.cc: Likewise.
 	* testsuite/26_numerics/lcm/105844.cc: Likewise.

 2023-07-24  Deev Patel  <pateldeev@nevada.unr.edu>

 	* include/std/format (_Formatting_scanner::_M_on_chars): Add
 	missing constexpr specifier.
 	(_Formatting_scanner::_M_format_arg): Likewise.

 2023-07-24  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110653
 	* include/bits/basic_string.h [!HAVE_STOF] (stof): Do not
 	throw an exception for zero result.
 	[HAVE_BROKEN_STRTOLD] (stold): Do not use strtold.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110077
 	* src/c++17/floating_from_chars.cc (from_chars): Only define
 	_Float128 overload when using __strfromf128.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110593
 	* include/bits/chrono.h (duration): Improve static assert
 	messages.
 	(__is_ratio): Move to ...
 	* include/std/ratio (__is_ratio): ... here.
 	(__is_ratio_v): New variable template and partial
 	specialization.
 	(__are_both_ratios): New function template.
 	(__ratio_multiply, ratio_equal, ratio_less, __ratio_add):
 	Add static assertion.
 	* testsuite/20_util/ratio/requirements/type_constraints.cc:
 	New test.
 	* testsuite/20_util/duration/requirements/typedefs_neg1.cc:
 	Adjust expected error.
 	* testsuite/20_util/duration/requirements/typedefs_neg2.cc:
 	Likewise.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (__formatter_chrono::_M_format):
 	Do not set __is_neg for hh_mm_ss before calling
 	_M_format_to_ostream. Change __print_sign lambda to only check
 	__is_neg for durations and hh_mm_ss types.
 	(__formatter_chrono::_M_format_to_ostream): Only check __is_neg
 	for duration types.
 	* testsuite/std/time/hh_mm_ss/io.cc: Check negative values.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110719
 	* include/bits/chrono_io.h (__formatter_chrono::_S_floor_seconds):
 	Handle duration and hh_mm_ss.
 	* testsuite/20_util/duration/io.cc: Check locale-specific
 	formats.
 	* testsuite/std/time/hh_mm_ss/io.cc: Likewise.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (__write_padded): Initialize first element
 	of array to avoid a -Wmaybe-uninitialized warning.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110719
 	* include/bits/chrono_io.h (__formatter_chrono::_M_parse): Fix
 	allowed modifiers for %z and %Z. Fix -Wparentheses and
 	-Wnarrowing warnings.
 	(__formatter_chrono::_M_format): Call new functions for %d, %e,
 	%H, %I, %m and %M.
 	(__formatter_chrono::_M_c): Use _S_floor_seconds to remove
 	subsecond precision.
 	(__formatter_chrono::_M_C_y_Y): Use _M_locale_fmt to handle
 	modifiers.
 	(__formatter_chrono::_M_e): Replace with _M_d_e and use
 	_M_locale_fmt.
 	(__formatter_chrono::_M_I): Replace with _M_H_I and use
 	_M_locale_fmt.
 	(__formatter_chrono::_M_m): New function.
 	(__formatter_chrono::_M_M): New function.
 	(__formatter_chrono::_M_r): Use _M_locale_fmt.
 	(__formatter_chrono::_M_S): Likewise.
 	(__formatter_chrono::_M_u_w): Likewise.
 	(__formatter_chrono::_M_U_V_W): Likewise.
 	(__formatter_chrono::_M_X): Use _S_floor_seconds.
 	(__formatter_chrono::_M_Z): Fix untested branch for wchar_t.
 	(__formatter_chrono::_S_altnum): Remove function.
 	(__formatter_chrono::_S_dd_zero_fill): Remove function.
 	(__formatter_chrono::_S_floor_seconds): New function.
 	(__formatter_chrono::_M_locale_fmt): New function.
 	* testsuite/std/time/clock/system/io.cc: Adjust expected output
 	for locale-specific formats and check modified formats.
 	* testsuite/std/time/clock/utc/io.cc: Likewise.
 	* testsuite/std/time/zoned_time/io.cc: New test.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110708
 	* include/bits/chrono_io.h (__formatter_chrono::_M_parse): Only
 	allow a single modifier.
 	* testsuite/std/time/format.cc: Check multiple modifiers.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110653
 	* testsuite/21_strings/basic_string/numeric_conversions/char/stod.cc:
 	Remove dg-require-string-conversions.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/stof.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/stoi.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/stol.cc:
 	Likewise.
 	* testsuite/21_strings/basic_string/numeric_conversions/char/stoul.cc:
 	Likewise.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110653
 	* include/bits/basic_string.h [!_GLIBCXX_HAVE_STRTOF] (stof):
 	Define in terms of std::stod.

 2023-07-19  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110653
 	* include/bits/basic_string.h [_GLIBCXX_HAVE_STRTOF] (stof):
 	Define.
 	[_GLIBCXX_HAVE_STRTOLD] (stold): Define.
 	* include/c_global/cstdlib [_GLIBCXX_HAVE_STRTOF] (strtof):
 	Declare in namespace std.
 	[_GLIBCXX_HAVE_STRTOLD] (strtold): Likewise.

 2023-07-13  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110653
 	* include/bits/basic_string.h (stoi, stol, stoul, stod): Do not
 	depend on _GLIBCXX_USE_C99_STDLIB.
 	[__LONG_WIDTH__ == __LONG_LONG_WIDTH__] (stoll, stoull): Define
 	in terms of stol and stoul respectively.
 	[__DBL_MANT_DIG__ == __LDBL_MANT_DIG__] (stold): Define in terms
 	of stod.

 2023-07-12  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/95048
 	* testsuite/27_io/filesystem/path/construct/95048.cc: Check
 	conversions to wide strings.
 	* testsuite/experimental/filesystem/path/construct/95048.cc:
 	Likewise.

 2023-07-12  Jonathan Wakely  <jwakely@redhat.com>

 	* config/io/basic_file_stdio.cc: Define LFS macros.
 	(__basic_file<char>::open): Use fopen unconditionally.
 	(get_file_offset): Use lseek unconditionally.
 	(__basic_file<char>::seekoff): Likewise.
 	(__basic_file<char>::showmanyc): Use fstat unconditionally.

 2023-07-12  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110574
 	* acinclude.m4 (GLIBCXX_CHECK_LFS): Check for fseeko and ftello
 	and define _GLIBCXX_USE_FSEEKO_FTELLO.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* config/io/basic_file_stdio.cc (xwrite) [_GLIBCXX_USE_STDIO_PURE]:
 	Check for fwrite error correctly.
 	(__basic_file<char>::xsgetn) [_GLIBCXX_USE_STDIO_PURE]: Check for
 	fread error correctly.
 	(get_file_offset): New function.
 	(__basic_file<char>::seekoff) [_GLIBCXX_USE_STDIO_PURE]: Use
 	fseeko if available. Use get_file_offset instead of return value
 	of fseek.
 	(__basic_file<char>::showmanyc): Use get_file_offset.

 2023-07-12  Ken Matsui  <kmatsui@gcc.gnu.org>

 	* include/std/type_traits (__make_unsigned_selector): Use
 	__is_enum built-in trait.
 	(__make_signed_selector): Likewise.
 	(__underlying_type_impl): Likewise.

 2023-07-06  Tianqiang Shuai  <1101282468@qq.com>

 	* config/io/basic_file_stdio.cc (xwrite) [USE_STDIO_PURE]: Fix
 	first argument.

 2023-07-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110574
 	* doc/xml/manual/configure.xml: Describe stdio_pure argument to
 	--enable-cstdio.
 	* doc/html/manual/configure.html: Regenerate.

 2023-07-05  Thomas Rodgers  <trodgers@redhat.com>

 	* testsuite/25_algorithms/pstl/alg_sorting/set.cc: Delete
 	file.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_difference.cc:
 	New file.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_intersection.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_symmetric_difference.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_union.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set_util.h:
 	Likewise.

 2023-07-05  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/23_containers/forward_list/debug/iterator1_neg.cc:
 	Skip as UNSUPPORTED for C++98 mode.
 	* testsuite/23_containers/forward_list/debug/iterator3_neg.cc:
 	Likewise.

 2023-07-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110542
 	* include/bits/stl_uninitialized.h (__uninitialized_default_n):
 	Do not use std::fill_n during constant evaluation.

 2023-07-05  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/vector.tcc (_M_default_append): Replace try-block
 	with RAII types.

 2023-07-05  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/iterator_concepts.h (projected): Add typename.

 2023-07-03  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/27_io/headers/iosfwd/synopsis.cc: Make wsyncbuf and
 	wosyncstream depend on _GLIBCXX_USE_CXX11_ABI.

 2023-07-03  Jonathan Wakely  <jwakely@redhat.com>

 	* include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
 	_PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
 	Define to OpenMP 5.0 pragmas even for GCC 10.0+.
 	(_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.

 2023-07-03  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/alloc_traits.h (_Destroy): Qualify call.
 	* include/bits/stl_construct.h (_Destroy, _Destroy_n): Likewise.
 	* testsuite/23_containers/vector/cons/destroy-adl.cc: New test.

 2023-07-03  Iain Sandoe  <iain@sandoe.co.uk>

 	* testsuite/lib/libstdc++.exp: Remove additional flag handled
 	by Darwin specs.

 2023-06-30  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110432
 	* acinclude.m4 (GLIBCXX_CHECK_INIT_PRIORITY): New.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* configure.ac: Use GLIBCXX_CHECK_INIT_PRIORITY.
 	* include/std/iostream: Use new autoconf macro as well as
 	__has_attribute.
 	* src/c++98/ios_base_init.h: Use new autoconf macro instead of
 	__has_attribute.

 2023-06-30  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++11/random.cc (random_device::_M_init): Add maybe_unused
 	attribute.

 2023-06-30  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/105081
 	* src/c++11/random.cc (random_device::_M_init): Throw
 	std::system_error when the requested device is a valid token but
 	not available at runtime.

 2023-06-30  Hans-Peter Nilsson  <hp@axis.com>

 	PR libstdc++/108672
 	* include/pstl/unseq_backend_simd.h (__simd_or): Re-apply using
 	__INT32_TYPE__ instead of int32_t.

 2023-06-29  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (USE_ATOMIC_SHARED_PTR): Define consistently
 	with USE_ATOMIC_LIST_HEAD.
 	(list_mutex): Replace global object with function. Use local
 	static object when std::mutex constructor isn't constexpr.

 2023-06-29  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110462
 	* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check that
 	copy_file_range can be called with loff_t* arguments.
 	* configure: Regenerate.
 	* src/filesystem/ops-common.h (copy_file_copy_file_range):
 	Use loff_t for offsets.

 2023-06-29  Tom Tromey  <tromey@adacore.com>

 	* testsuite/lib/gdb-test.exp (gdb-test): Relax type-printer
 	regexp.

 2023-06-28  Jan Hubicka  <jh@suse.cz>

 	PR middle-end/109849
 	* include/bits/c++config (std::__terminate): Mark cold.
 	* include/bits/functexcept.h: Mark everything as cold.
 	* libsupc++/exception: Mark terminate and unexpected as cold.

 2023-06-26  Thomas Rodgers  <trodgers@redhat.com>

 	* include/pstl/algorithm_fwd.h: Synchronize with upstream.
 	* include/pstl/algorithm_impl.h: Likewise.
 	* include/pstl/execution_defs.h: Likewise.
 	* include/pstl/execution_impl.h: Likewise.
 	* include/pstl/glue_algorithm_impl.h: Likewise.
 	* include/pstl/glue_execution_defs.h: Likewise.
 	* include/pstl/glue_memory_impl.h: Likewise.
 	* include/pstl/glue_numeric_impl.h: Likewise.
 	* include/pstl/memory_impl.h: Likewise.
 	* include/pstl/numeric_fwd.h: Likewise.
 	* include/pstl/numeric_impl.h: Likewise.
 	* include/pstl/parallel_backend.h: Likewise.
 	* include/pstl/parallel_backend_serial.h: Likewise.
 	* include/pstl/parallel_backend_tbb.h: Likewise.
 	* include/pstl/parallel_impl.h: Likewise.
 	* include/pstl/pstl_config.h: Likewise.
 	* include/pstl/unseq_backend_simd.h: Likewise.
 	* include/pstl/utils.h: Likewise.
 	* testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
 	Likewise.
 	* testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/set.cc:
 	Likewise.
 	* testsuite/25_algorithms/pstl/alg_sorting/sort.cc:
 	Likewise.
 	* testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
 	Likewise.
 	* testsuite/26_numerics/pstl/numeric_ops/reduce.cc:
 	Likewise.
 	* testsuite/26_numerics/pstl/numeric_ops/scan.cc:
 	Likewise.
 	* testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
 	Likewise.
 	* testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
 	Likewise.
 	* testsuite/util/pstl/test_utils.h:
 	Likewise.

 2023-06-26  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110239
 	* include/std/format (__format::__parse_integer): Fix buffer
 	overflow for wide chars.
 	(formatter<const void*, C>::format): Cast to uintptr_t instead
 	of uint64_t.
 	* testsuite/std/format/string.cc: Test too-large widths.

 2023-06-26  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/iterator_concepts.h (projected): Replace class
 	template with alias template denoting an ADL-proofed helper.
 	(incremental_traits<projected<Iter, Proj>>): Remove.
 	* testsuite/24_iterators/indirect_callable/projected-adl.cc:
 	New test.

 2023-06-26  Jonathan Wakely  <jwakely@redhat.com>

 	* include/debug/helper_functions.h (__get_distance)
 	(__check_singular, __valid_range_aux, __valid_range): Qualify
 	calls to disable ADL.
 	(__check_singular_aux(const _Safe_iterator_base*)): Declare
 	overload that was previously found via ADL.

 2023-06-23  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/vector.tcc (_M_realloc_insert): Replace try-block
 	with RAII types.

 2023-06-20  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/array (to_array(T(&)[N])): Remove redundant
 	condition.
 	(to_array(T(&&)[N])): Remove redundant std::move.

 2023-06-16  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/20_util/from_chars/4.cc: Skip long double on
 	aarch64-rtems.

 2023-06-16  Joel Brobecker  <brobecker@adacore.com>

 	* configure.ac ["x${with_newlib}" = "xyes"]: Define
 	HAVE_HYPOTF.  Add compile-checks for various long double
 	math functions as well.
 	* configure: Regenerate.

 2023-06-14  Jonny Grant  <jg@jguk.org>

 	* doc/xml/manual/extensions.xml: Remove demangle exception
 	description and include.
 	* doc/html/manual/ext_demangling.html: Regenerate.

 2023-06-10  Hans-Peter Nilsson  <hp@axis.com>

 	* testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc (main)
 	[! SIMULATOR_TEST]: Also exclude running test05.
 	* testsuite/27_io/basic_istream/ignore/char/94749.cc: Ditto.

 2023-06-09  Ken Matsui  <kmatsui@cs.washington.edu>

 	* include/std/type_traits: Use using instead of typedef

 2023-06-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110077
 	* src/c++17/floating_from_chars.cc (from_chars) <_Float128>:
 	Only define if _Float128 and long double have different
 	representations.

 2023-06-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/100285
 	* include/experimental/internet [IPPROTO_TCP || IPPROTO_UDP]
 	(basic_endpoint, basic_resolver_entry, resolver_base)
 	(basic_resolver_results, basic_resolver): Only define if the tcp
 	or udp protocols will be defined.

 2023-06-09  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (libtool_VERSION): Update to 6.0.33.
 	* configure: Regenerate.
 	* doc/xml/manual/abi.xml: Add libstdc++.so.6.0.33.
 	* doc/html/manual/abi.html: Regenerate.

 2023-06-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110149
 	* include/std/format (formatter<const void*, charT>::parse):
 	Only alow 0 and P for C++26 and non-strict modes.
 	(formatter<const void*, charT>::format): Use toupper for P
 	type, and insert zero-fill characters for 0 option.
 	* testsuite/std/format/functions/format.cc: Check pointer
 	formatting. Only check P2510R3 extensions conditionally.
 	* testsuite/std/format/parse_ctx.cc: Only check P2510R3
 	extensions conditionally.

 2023-06-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110167
 	* include/std/array (to_array): Initialize arrays of trivial
 	types using memcpy. For non-trivial types, use lambda
 	expressions instead of a separate helper function.
 	(__to_array): Remove.
 	* testsuite/23_containers/array/creation/110167.cc: New test.

 2023-06-09  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/23_containers/deque/modifiers/emplace/52799.cc:
 	Removed.
 	* testsuite/23_containers/deque/modifiers/emplace/const_iterator.cc:
 	Removed.
 	* testsuite/23_containers/list/modifiers/emplace/52799.cc:
 	Removed.
 	* testsuite/23_containers/list/modifiers/emplace/const_iterator.cc:
 	Removed.
 	* testsuite/23_containers/vector/modifiers/emplace/52799.cc:
 	Removed.
 	* testsuite/23_containers/vector/modifiers/emplace/const_iterator.cc:
 	Removed.
 	* testsuite/23_containers/deque/modifiers/emplace/1.cc: New
 	test.
 	* testsuite/23_containers/list/modifiers/emplace/1.cc: New
 	test.
 	* testsuite/23_containers/vector/modifiers/emplace/1.cc: New
 	test.

 2023-06-07  Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/110145
 	* testsuite/20_util/to_chars/double.cc: Include <cfloat>.
 	(double_to_chars_test_cases,
 	double_scientific_precision_to_chars_test_cases_2,
 	double_fixed_precision_to_chars_test_cases_2): #if out 1e126, 4.91e-6
 	and 5.547e-6 tests if FLT_EVAL_METHOD is negative or larger than 1.
 	Add unconditional tests with corresponding double constants
 	0x1.7a2ecc414a03fp+418, 0x1.4981285e98e79p-18 and
 	0x1.7440bbff418b9p-18.

 2023-06-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/util/testsuite_abi.cc (check_version): Re-add
 	CXXABI_1.3.14.

 2023-06-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/nested_exception/rethrow_if_nested-term.cc:
 	Require effective target exceptions_enabled instead of using
 	dg-skip-if.
 	* testsuite/23_containers/vector/capacity/constexpr.cc: Expect
 	shrink_to_fit() to be a no-op without exceptions enabled.
 	* testsuite/23_containers/vector/capacity/shrink_to_fit.cc:
 	Likewise.
 	* testsuite/ext/bitmap_allocator/check_allocate_max_size.cc:
 	Require effective target exceptions_enabled.
 	* testsuite/ext/malloc_allocator/check_allocate_max_size.cc:
 	Likewise.
 	* testsuite/ext/mt_allocator/check_allocate_max_size.cc:
 	Likewise.
 	* testsuite/ext/new_allocator/check_allocate_max_size.cc:
 	Likewise.
 	* testsuite/ext/pool_allocator/check_allocate_max_size.cc:
 	Likewise.
 	* testsuite/ext/throw_allocator/check_allocate_max_size.cc:
 	Likewise.

 2023-06-07  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/20_util/duration/cons/2.cc: Use values that aren't
 	affected by rounding.
 	* testsuite/20_util/from_chars/5.cc: Cast arithmetic result to
 	double before comparing for equality.
 	* testsuite/20_util/from_chars/6.cc: Likewise.
 	* testsuite/20_util/variant/86874.cc: Use values that aren't
 	affected by rounding.
 	* testsuite/25_algorithms/lower_bound/partitioned.cc: Compare to
 	original value instead of to floating-point-literal.
 	* testsuite/26_numerics/random/discrete_distribution/cons/range.cc:
 	Cast arithmetic result to double before comparing for equality.
 	* testsuite/26_numerics/random/piecewise_constant_distribution/cons/range.cc:
 	Likewise.
 	* testsuite/26_numerics/random/piecewise_linear_distribution/cons/range.cc:
 	Likewise.
 	* testsuite/26_numerics/valarray/transcend.cc (eq): Check that
 	the absolute difference is less than 0.01 instead of comparing
 	to two decimal places.
 	* testsuite/27_io/basic_istream/extractors_arithmetic/char/01.cc:
 	Cast arithmetic result to double before comparing for equality.
 	* testsuite/27_io/basic_istream/extractors_arithmetic/char/09.cc:
 	Likewise.
 	* testsuite/27_io/basic_istream/extractors_arithmetic/char/10.cc:
 	Likewise.
 	* testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/01.cc:
 	Likewise.
 	* testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/09.cc:
 	Likewise.
 	* testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/10.cc:
 	Likewise.
 	* testsuite/ext/random/hoyt_distribution/cons/parms.cc: Likewise.

 2023-06-07  Jonathan Wakely  <jwakely@redhat.com>

 	Revert:
 	2023-06-06  Jonathan Wakely  <jwakely@redhat.com>

 	* configure.ac: Use AS_IF.
 	* configure: Regenerate.

 2023-06-07  Thomas Schwinge  <thomas@codesourcery.com>

 	* testsuite/lib/prune.exp (libstdc++-dg-prune): Support
 	'UNSUPPORTED: [...]: exception handling disabled'.

 2023-06-06  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/util/testsuite_abi.cc (check_version): Add
 	CXXABI_1.3.15 symver and make it the latestp. Remove
 	GLIBCXX_IEEE128_3.4.31 and GLIBCXX_LDBL_3.4.31 from latestp.

 2023-06-06  Jonathan Wakely  <jwakely@redhat.com>
 	    Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/104772
 	* include/std/limits: (numeric_limits<__float128>): Define
 	for __STRICT_ANSI__ as well.
 	* testsuite/18_support/numeric_limits/128bit.cc: Remove
 	check for __STRICT_ANSI__.

 2023-06-06  Jonathan Wakely  <jwakely@redhat.com>

 	* configure.ac: Use AS_IF.
 	* configure: Regenerate.

 2023-06-06  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/109822
 	* include/experimental/bits/simd_builtin.h (_S_store): Rewrite
 	to avoid casts to other vector types. Implement store as
 	succession of power-of-2 sized memcpy to avoid PR90424.

 2023-06-06  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/110054
 	* include/experimental/bits/simd_builtin.h (_S_masked_store):
 	Call into deduced ABI's SimdImpl after conversion.
 	* include/experimental/bits/simd_x86.h (_S_masked_store_nocvt):
 	Don't use _mm_maskmoveu_si128. Use the generic fall-back
 	implementation. Also fix masked stores without SSE2, which
 	were not doing anything before.

 2023-06-06  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd.h (__bit_cast): Use
 	__gnu__::__vector_size__ instead of gnu::vector_size.

 2023-06-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110139
 	* include/std/array (__array_traits<T, 0>::operator T*()): Make
 	conversion operator explicit.
 	(array::front): Use size_type as subscript operand.
 	(array::data): Use static_cast to make conversion explicit.
 	* testsuite/23_containers/array/element_access/110139.cc: New
 	test.

 2023-06-06  Joseph Faulls  <Joseph.Faulls@imgtec.com>

 	* include/bits/locale_classes.tcc: Remove check for
 	codecvt<char8_t, char, mbstate_t> facet.

 2023-06-06  Jonathan Wakely  <jwakely@redhat.com>

 	* src/filesystem/ops-common.h (do_copy_file) [O_CLOEXEC]: Set
 	close-on-exec flag on file descriptors.

 2023-06-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108178
 	* src/filesystem/ops-common.h (do_copy_file): Check for empty
 	files by trying to read a character.
 	* testsuite/27_io/filesystem/operations/copy_file_108178.cc:
 	New test.

 2023-06-06  Jannik Glückert  <jannik.glueckert@gmail.com>

 	* acinclude.m4 (_GLIBCXX_USE_COPY_FILE_RANGE): Define.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* src/filesystem/ops-common.h (copy_file_copy_file_range):
 	Define new function.
 	(do_copy_file): Use it.

 2023-06-06  Jannik Glückert  <jannik.glueckert@gmail.com>

 	* acinclude.m4 (_GLIBCXX_HAVE_LSEEK): Define.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* src/filesystem/ops-common.h (copy_file_sendfile): Define new
 	function for sendfile logic. Loop to support large files. Skip
 	zero-length files.
 	(do_copy_file): Use it.

 2023-06-04  Jason Merrill  <jason@redhat.com>

 	PR c++/97720
 	* libsupc++/eh_call.cc (__cxa_call_terminate): Take void*.
 	* config/abi/pre/gnu.ver: Add it.

 2023-06-02  François Dumont  <fdumont@gcc.gnu.org>

 	* include/parallel/algobase.h: Include <parallel/search.h>.

 2023-06-01  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
 	Add const to equality operator.

 2023-06-01  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/expected (expected::and_then, expected::or_else)
 	(expected::transform_error): Use _M_val and _M_unex instead of
 	calling value() and error(), as per LWG 3938.
 	(expected::transform): Likewise. Remove incorrect std::move
 	calls from lvalue overloads.
 	(expected<void, E>::and_then, expected<void, E>::or_else)
 	(expected<void, E>::transform): Use _M_unex instead of calling
 	error().
 	* testsuite/20_util/expected/lwg3877.cc: Add checks for and_then
 	and transform, and for std::expected<void, E>.
 	* testsuite/20_util/expected/lwg3938.cc: New test.

 2023-06-01  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/110060
 	* include/bits/stl_vector.h (_Vector_base::_M_invariant):
 	Remove.
 	(vector::size, vector::capacity): Remove calls to _M_invariant.
 	* include/bits/vector.tcc (vector::_M_fill_assign): Add
 	optimization hint to reallocating path.
 	(vector::_M_assign_aux(FwdIter, FwdIter, forward_iterator_tag)):
 	Likewise.
 	* testsuite/23_containers/vector/capacity/invariant.cc: Moved
 	to...
 	* testsuite/23_containers/vector/modifiers/assign/no_realloc.cc:
 	...here. Check assign(FwdIter, FwdIter) too.
 	* testsuite/23_containers/vector/types/1.cc: Revert addition
 	of -Wno-stringop-overread option.

 2023-06-01  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/evolution.xml: Document removal of implicit
 	allocator rebinding extensions in strict mode and for C++20.
 	* doc/html/*: Regenerate.

 2023-06-01  Jason Merrill  <jason@redhat.com>

 	* libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Don't check
 	handlers in the cleanup phase.

 2023-06-01  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/110050
 	* include/experimental/bits/simd.h (__vectorized_sizeof): With
 	__have_neon_a32 only single-precision float works (in addition
 	to integers).

 2023-06-01  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/stl_algo.h
 	(std::__search, std::search(_FwdIt1, _FwdIt1, _FwdIt2, _FwdIt2, _BinPred)): Move...
 	* include/bits/stl_algobase.h: ...here.
 	* include/std/functional: Replace <stl_algo.h> include by <stl_algobase.h>.
 	* include/parallel/algo.h (std::__parallel::search<_FIt1, _FIt2, _BinaryPred>)
 	(std::__parallel::__search_switch<_FIt1, _FIt2, _BinaryPred, _ItTag1, _ItTag2>):
 	Move...
 	* include/parallel/algobase.h: ...here.
 	* include/experimental/functional: Remove <bits/stl_algo.h> and <parallel/algorithm>
 	includes. Include <bits/stl_algobase.h>.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109818
 	* acinclude.m4 (GLIBCXX_ENABLE_C99): Add separate check for
 	float_t and double_t and define HAVE_C99_FLT_EVAL_TYPES.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* include/c_global/cmath (float_t, double_t): Guard using new
 	_GLIBCXX_HAVE_C99_FLT_EVAL_TYPES macro.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ENABLE_C99): Add checks for C99 math
 	functions and define _GLIBCXX_USE_C99_MATH_FUNCS. Move checks
 	for C99 rounding functions to here.
 	(GLIBCXX_CHECK_C99_TR1): Remove checks for C99 rounding
 	functions from here.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* include/bits/random.h: Use _GLIBCXX_USE_C99_MATH_FUNCS instead
 	of _GLIBCXX_USE_C99_MATH_TR1.
 	* include/bits/random.tcc: Likewise.
 	* include/c_compatibility/math.h: Likewise.
 	* include/c_global/cmath: Likewise.
 	* include/ext/random: Likewise.
 	* include/ext/random.tcc: Likewise.
 	* include/std/complex: Likewise.
 	* testsuite/20_util/from_chars/4.cc: Likewise.
 	* testsuite/20_util/from_chars/8.cc: Likewise.
 	* testsuite/26_numerics/complex/proj.cc: Likewise.
 	* testsuite/26_numerics/headers/cmath/60401.cc: Likewise.
 	* testsuite/26_numerics/headers/cmath/types_std_c++0x.cc:
 	Likewise.
 	* testsuite/lib/libstdc++.exp (check_v3_target_cstdint):
 	Likewise.
 	* testsuite/util/testsuite_random.h: Likewise.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/stl_vector.h (_Vector_base::_M_invariant()): New
 	function.
 	(vector::size(), vector::capacity()): Call _M_invariant().
 	* testsuite/23_containers/vector/capacity/invariant.cc: New test.
 	* testsuite/23_containers/vector/types/1.cc: Add suppression for
 	false positive warning (PR110060).

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109921
 	* src/c++17/floating_from_chars.cc: Check __FLT128_MANT_DIG__ is
 	defined before trying to use _Float128.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ZONEINFO_DIR): Fix for 32-bit pointers
 	to check __INT_PTR_WIDTH__ instead of sizeof(void*).
 	* configure: Regenerate.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/unique_lock.h: Include <bits/error_constants.h>
 	here for std::errc constants.
 	* include/std/mutex: Do not include <bits/error_constants.h> and
 	<exception> here.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* configure.ac: Replace use of -o operator for test.
 	* configure: Regenerate.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/scoped_allocator (scoped_allocator_adaptor): Add
 	noexcept to all constructors except the default constructor.
 	(scoped_allocator_adaptor::inner_allocator): Add noexcept.
 	(scoped_allocator_adaptor::outer_allocator): Likewise.
 	* testsuite/20_util/scoped_allocator/noexcept.cc: New test.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/104772
 	* include/std/limits (numeric_limits<__float128>): Define.
 	* testsuite/18_support/numeric_limits/128bit.cc: New test.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ZONEINFO_DIR): Extend logic for avr and
 	msp430 to all 16-bit targets.
 	* configure: Regenerate.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109921
 	* src/c++17/floating_from_chars.cc (USE_STRTOF128_FOR_FROM_CHARS):
 	Only define when USE_STRTOD_FOR_FROM_CHARS is also defined.
 	(USE_STRTOD_FOR_FROM_CHARS): Do not undefine when long double is
 	binary64.
 	(from_chars(const char*, const char*, double&, chars_format)):
 	Check __LDBL_MANT_DIG__ == __DBL_MANT_DIG__ here.
 	(from_chars(const char*, const char*, _Float128&, chars_format))
 	Only use from_chars_strtod when USE_STRTOD_FOR_FROM_CHARS is
 	defined, otherwise parse a long double and convert to _Float128.

 2023-05-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109922
 	* include/std/iomanip (operator>>(basic_istream&, _Setfill)):
 	Add deprecated attribute to non-standard overload.
 	* doc/xml/manual/evolution.xml: Document deprecation.
 	* doc/html/*: Regenerate.
 	* testsuite/27_io/manipulators/standard/char/1.cc: Add
 	dg-warning for expected deprecated warning.
 	* testsuite/27_io/manipulators/standard/char/2.cc: Likewise.
 	* testsuite/27_io/manipulators/standard/wchar_t/1.cc: Likewise.
 	* testsuite/27_io/manipulators/standard/wchar_t/2.cc: Likewise.

 2023-05-30  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/20_util/from_chars/4.cc: Skip long double test06
 	on x86_64-vxworks.
 	* testsuite/20_util/to_chars/long_double.cc: Xfail run on
 	x86_64-vxworks.

 2023-05-30  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/109822
 	* include/experimental/bits/simd.h (to_native): Use int NTTP
 	as specified in PTS2.
 	(to_compatible): Likewise. Add missing tag to call mask
 	generator ctor.
 	* testsuite/experimental/simd/pr109822_cast_functions.cc: New
 	test.

 2023-05-30  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/tests/integer_operators.cc:
 	Compute expected value differently to avoid getting turned into
 	a vector shift.

 2023-05-30  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/tests/operator_cvt.cc: Make long
 	double <-> (u)long conversion tests conditional on sizeof(long
 	double) and sizeof(long).

 2023-05-26  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_ppc.h (_S_bit_shift_left):
 	Negative __y is UB, so prefer signed compare.

 2023-05-25  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/util/testsuite_allocator.h (PointerBase): Add
 	relational operators.

 2023-05-25  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/20_util/to_chars/long_double.cc: Expect execution
 	fail on x86-vxworks.

 2023-05-24  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/109949
 	* include/experimental/bits/simd.h (__intrinsic_type): If
 	__ALTIVEC__ is defined, map gnu::vector_size types to their
 	corresponding __vector T types without losing unsignedness of
 	integer types. Also prefer long long over long.
 	* include/experimental/bits/simd_ppc.h (_S_popcount): Cast mask
 	object to the expected unsigned vector type.

 2023-05-24  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/109261
 	* include/experimental/bits/simd.h (__intrinsic_type):
 	Specialize __intrinsic_type<double, 8> and
 	__intrinsic_type<double, 16> in any case, but provide the member
 	type only with __aarch64__.

 2023-05-24  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/109261
 	* include/experimental/bits/simd_neon.h (_S_reduce): Add
 	constexpr and make NEON implementation conditional on
 	not __builtin_is_constant_evaluated.

 2023-05-23  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/109261
 	* include/experimental/bits/simd.h (_SimdWrapper::_M_set):
 	Avoid vector builtin subscripting in constant expressions.
 	(resizing_simd_cast): Avoid memcpy if constant_evaluated.
 	(const_where_expression, where_expression, where)
 	(__extract_part, simd_mask, _SimdIntOperators, simd): Add either
 	_GLIBCXX_SIMD_CONSTEXPR (on public APIs), or constexpr (on
 	internal APIs).
 	* include/experimental/bits/simd_builtin.h (__vector_permute)
 	(__vector_shuffle, __extract_part, _GnuTraits::_SimdCastType1)
 	(_GnuTraits::_SimdCastType2, _SimdImplBuiltin)
 	(_MaskImplBuiltin::_S_store): Add constexpr.
 	(_CommonImplBuiltin::_S_store_bool_array)
 	(_SimdImplBuiltin::_S_load, _SimdImplBuiltin::_S_store)
 	(_SimdImplBuiltin::_S_reduce, _MaskImplBuiltin::_S_load): Add
 	constant_evaluated case.
 	* include/experimental/bits/simd_fixed_size.h
 	(_S_masked_load): Reword comment.
 	(__tuple_element_meta, __make_meta, _SimdTuple::_M_apply_r)
 	(_SimdTuple::_M_subscript_read, _SimdTuple::_M_subscript_write)
 	(__make_simd_tuple, __optimize_simd_tuple, __extract_part)
 	(__autocvt_to_simd, _Fixed::__traits::_SimdBase)
 	(_Fixed::__traits::_SimdCastType, _SimdImplFixedSize): Add
 	constexpr.
 	(_SimdTuple::operator[], _M_set): Add constexpr and add
 	constant_evaluated case.
 	(_MaskImplFixedSize::_S_load): Add constant_evaluated case.
 	* include/experimental/bits/simd_scalar.h: Add constexpr.
 	* include/experimental/bits/simd_x86.h (_CommonImplX86): Add
 	constexpr and add constant_evaluated case.
 	(_SimdImplX86::_S_equal_to, _S_not_equal_to, _S_less)
 	(_S_less_equal): Value-initialize to satisfy constexpr
 	evaluation.
 	(_MaskImplX86::_S_load): Add constant_evaluated case.
 	(_MaskImplX86::_S_store): Add constexpr and constant_evaluated
 	case. Value-initialize local variables.
 	(_MaskImplX86::_S_logical_and, _S_logical_or, _S_bit_not)
 	(_S_bit_and, _S_bit_or, _S_bit_xor): Add constant_evaluated
 	case.
 	* testsuite/experimental/simd/pr109261_constexpr_simd.cc: New
 	test.

 2023-05-22  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_builtin.h (_S_fpclassify): Move
 	__infn into #ifdef'ed block.
 	* testsuite/experimental/simd/tests/fpclassify.cc: Declare
 	constants only when used.
 	* testsuite/experimental/simd/tests/frexp.cc: Likewise.
 	* testsuite/experimental/simd/tests/logarithm.cc: Likewise.
 	* testsuite/experimental/simd/tests/trunc_ceil_floor.cc:
 	Likewise.
 	* testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
 	Move totest and expect1 into #ifdef'ed block.

 2023-05-19  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/strings.xml: Move lafstern.org reference to https.
 	* doc/html/manual/strings.html: Regenerate.

 2023-05-17  Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/109883
 	* testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc: New test.

 2023-05-17  Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/109883
 	* include/c_global/cmath (atan2, fmod, pow): Move
 	__gnu_cxx::__promote_2 using templates after _Float{16,32,64,128} and
 	__gnu_cxx::__bfloat16_t overloads.
 	(copysign, fdim, fmax, fmin, hypot, nextafter, remainder, remquo):
 	Likewise.
 	(fma): Move __gnu_cxx::__promote_3 using template after
 	_Float{16,32,64,128} and __gnu_cxx::__bfloat16_t overloads.

 2023-05-17  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/18_support/headers/limits/synopsis.cc: Uncomment
 	checks for float_round_style and float_denorm_style.

 2023-05-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/c++config: Add system_header pragma.

 2023-05-17  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/expected (expected::and_then, expected::or_else)
 	(expected::transform, expected::transform_error): Fix exception
 	specifications as per LWG 3877.
 	(expected<void, E>::and_then, expected<void, E>::transform):
 	Likewise.
 	* testsuite/20_util/expected/lwg3877.cc: New test.

 2023-05-17  Ken Matsui  <kmatsui@cs.washington.edu>

 	* include/std/type_traits: Use __bool_constant instead of
 	integral_constant.

 2023-05-17  Jonathan Wakely  <jwakely@redhat.com>

 	* configure: Regenerate.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109741
 	* acinclude.m4 (GLIBCXX_CHECK_ALIGNAS_CACHELINE): Define.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* configure.ac: Use GLIBCXX_CHECK_ALIGNAS_CACHELINE.
 	* src/c++11/shared_ptr.cc (__gnu_internal::get_mutex): Do not
 	align lock table if not supported. use __GCC_DESTRUCTIVE_SIZE
 	instead of hardcoded 64.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_USE_C99): Check for isblank in C++11
 	mode and define _GLIBCXX_USE_C99_CTYPE. Check for <fenv.h>
 	functions in C++11 mode and define _GLIBCXX_USE_C99_FENV.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* include/c_compatibility/fenv.h: Check _GLIBCXX_USE_C99_FENV
 	instead of _GLIBCXX_USE_C99_FENV_TR1.
 	* include/c_global/cfenv: Likewise.
 	* include/c_global/cctype: Check _GLIBCXX_USE_C99_CTYPE instead
 	of _GLIBCXX_USE_C99_CTYPE_TR1.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_USE_C99): Check for <stdint.h> types in
 	C++11 mode and define _GLIBCXX_USE_C99_STDINT. Check for
 	<inttypes.h> features in C++11 mode and define
 	_GLIBCXX_USE_C99_INTTYPES and _GLIBCXX_USE_C99_INTTYPES_WCHAR_T.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* doc/doxygen/user.cfg.in (PREDEFINED): Add new macros.
 	* include/bits/chrono.h: Check _GLIBCXX_USE_C99_STDINT instead
 	of _GLIBCXX_USE_C99_STDINT_TR1.
 	* include/c_compatibility/inttypes.h: Check
 	_GLIBCXX_USE_C99_INTTYPES and _GLIBCXX_USE_C99_INTTYPES_WCHAR_T
 	instead of _GLIBCXX_USE_C99_INTTYPES_TR1 and
 	_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1.
 	* include/c_compatibility/stdatomic.h: Check
 	_GLIBCXX_USE_C99_STDINT instead of _GLIBCXX_USE_C99_STDINT_TR1.
 	* include/c_compatibility/stdint.h: Likewise.
 	* include/c_global/cinttypes: Check _GLIBCXX_USE_C99_INTTYPES
 	and _GLIBCXX_USE_C99_INTTYPES_WCHAR_T instead of
 	_GLIBCXX_USE_C99_INTTYPES_TR1 and
 	_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1.
 	* include/c_global/cstdint: Check _GLIBCXX_USE_C99_STDINT
 	instead of _GLIBCXX_USE_C99_STDINT_TR1.
 	* include/std/atomic: Likewise.
 	* src/c++11/cow-stdexcept.cc: Likewise.
 	* testsuite/29_atomics/headers/stdatomic.h/c_compat.cc:
 	Likewise.
 	* testsuite/lib/libstdc++.exp (check_v3_target_cstdint):
 	Likewise.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_USE_C99): Check for complex inverse trig
 	functions in C++11 mode and define _GLIBCXX_USE_C99_COMPLEX_ARC.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* doc/doxygen/user.cfg.in (PREDEFINED): Add new macro.
 	* include/std/complex: Check _GLIBCXX_USE_C99_COMPLEX_ARC
 	instead of _GLIBCXX_USE_C99_COMPLEX_TR1.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/ext/debug_allocator/check_deallocate_null.cc: Add
 	assertion to ensure expected exception is throw.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/libstdc++-prettyprinters/chrono.cc: Only test
 	printer for chrono::zoned_time for cx11 ABI and tzdb effective
 	target.

 2023-05-16  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK): Define
 	_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK in terms of _GLIBCXX_TSAN.
 	* configure: Regenerate.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_CHECK_C99_TR1): Use a non-null pointer
 	to check for nan, nanf, and nanl.
 	* configure: Regenerate.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/char_traits.h (char_traits<char16_t>): Do not
 	depend on _GLIBCXX_USE_C99_STDINT_TR1.
 	(char_traits<char32_t>): Likewise.
 	* include/experimental/source_location: Likewise.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/atomic (atomic_int_least8_t, atomic_uint_least8_t)
 	(atomic_int_least16_t, atomic_uint_least16_t)
 	(atomic_int_least32_t, atomic_uint_least32_t)
 	(atomic_int_least64_t, atomic_uint_least64_t)
 	(atomic_int_fast16_t, atomic_uint_fast16_t)
 	(atomic_int_fast32_t, atomic_uint_fast32_t)
 	(atomic_int_fast64_t, atomic_uint_fast64_t)
 	(atomic_intmax_t, atomic_uintmax_t): Define unconditionally.
 	* testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: Adjust.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/algorithmfwd.h (shuffle): Do not depend on
 	_GLIBCXX_USE_C99_STDINT_TR1.
 	* include/bits/ranges_algo.h (shuffle): Likewise.
 	* include/bits/stl_algo.h (shuffle): Likewise.
 	* include/ext/random: Likewise.
 	* include/ext/throw_allocator.h (random_condition): Likewise.
 	* include/std/random: Likewise.
 	* src/c++11/cow-string-inst.cc: Likewise.
 	* src/c++11/random.cc: Likewise.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/experimental/feat-cxx14.cc: Remove dependency on
 	_GLIBCXX_USE_C99_STDINT_TR1.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/22_locale/locale/cons/unicode.cc: Remove dependency
 	on _GLIBCXX_USE_C99_STDINT_TR1.

 2023-05-12  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/21_strings/basic_string_view/typedefs.cc: Remove
 	dependency on _GLIBCXX_USE_C99_STDINT_TR1.
 	* testsuite/experimental/string_view/typedefs.cc: Likewise.

 2023-05-11  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++17/floating_from_chars.cc [USE_STRTOD_FOR_FROM_CHARS]
 	(auto_locale, auto_ferounding): New class types.
 	(from_chars_impl): Use auto_locale and auto_ferounding.

 2023-05-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109772
 	* include/std/chrono (hh_mm_ss::__fits): Remove variable
 	template.
 	(hh_mm_ss::__subseconds): Remove __fits from constraints.
 	* testsuite/std/time/hh_mm_ss/109772.cc: New test.
 	* testsuite/std/time/hh_mm_ss/1.cc: Adjust expected size for
 	hh_mm_ss<duration<int, std::pico>>.

 2023-05-11  Jonathan Wakely  <jwakely@redhat.com>

 	* config/abi/pre/gnu.ver: Export basic_string::_S_allocate.
 	* include/bits/basic_ios.h: Add static assertion checking
 	traits_type::value_type.
 	* include/bits/basic_string.h: Likewise. Do not rebind
 	allocator, and add static assertion checking its value_type.
 	(basic_string::_Alloc_traits_impl): Remove class template.
 	(basic_string::_S_allocate): New static member function.
 	(basic_string::assign): Use _S_allocate.
 	* include/bits/basic_string.tcc (basic_string::_M_create)
 	(basic_string::reserve, basic_string::_M_replace): Likewise.
 	* testsuite/21_strings/basic_string/requirements/explicit_instantiation/debug.cc:
 	Disable for C++20 and later.
 	* testsuite/21_strings/basic_string/requirements/explicit_instantiation/int.cc:
 	Likweise.

 2023-05-11  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109758
 	* include/bits/std_abs.h (abs(__float128)): Handle negative NaN
 	and negative zero correctly.
 	* testsuite/26_numerics/headers/cmath/109758.cc: New test.

 2023-05-10  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/hashtable_policy.h
 	(_NodeBuilder<>::_S_build): Use __node_ptr.
 	(_ReuseOrAllocNode<>): Use __node_ptr in place of __node_type*.
 	(_AllocNode<>): Likewise.
 	(_Equality<>::_M_equal): Remove const_iterator usages. Only preserved
 	to call std::is_permutation in the non-unique key implementation.
 	* include/bits/hashtable.h (_Hashtable<>::_M_update_begin()): Capture
 	_M_begin() once.
 	(_Hashtable<>::_M_bucket_begin(size_type)): Implement implicitly inline.
 	(_Hashtable<>::_M_insert_bucket_begin): Likewise.
 	(_Hashtable<>::_M_remove_bucket_begin): Likewise.
 	(_Hashtable<>::_M_compute_hash_code): Use __node_ptr rather than
 	const_iterator.
 	(_Hashtable<>::find): Likewise.
 	(_Hashtable<>::_M_emplace): Likewise.
 	(_Hashtable<>::_M_insert_unique): Likewise.

 2023-05-09  Jonathan Wakely  <jwakely@redhat.com>

 	* python/libstdcxx/v6/printers.py (StdChronoDurationPrinter):
 	Print floating-point durations correctly.
 	(StdChronoTimePointPrinter): Support printing only the value,
 	not the type name. Uncomment handling for known clocks.
 	(StdChronoZonedTimePrinter): Remove type names from output.
 	(StdChronoCalendarPrinter): Fix hh_mm_ss member access.
 	(StdChronoTimeZonePrinter): Add equals sign to output.
 	* testsuite/libstdc++-prettyprinters/chrono.cc: New test.

 2023-05-05  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/20_util/from_chars/4.cc: Skip long double test06
 	on aarch64-vxworks.
 	* testsuite/20_util/to_chars/long_double.cc: Xfail run on
 	aarch64-vxworks.

 2023-05-04  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/abi.xml (abi.versioning.history): Document
 	libstdc++.so.6.0.32 and GLIBCXX_3.4.32 version.
 	* doc/html/manual/abi.html: Regenerate.

 2023-05-04  Florian Weimer  <fweimer@redhat.com>

 	* doc/xml/manual/abi.xml (abi.versioning.history): Add
 	GCC_7.0.0, GCC_9.0.0, GCC_11.0, GCC_12.0.0, GCC_13.0.0 for
 	libgcc_s.

 2023-05-03  Jakub Jelinek  <jakub@redhat.com>

 	* src/c++17/floating_from_chars.cc
 	(_ZSt10from_charsPKcS0_RDF128_St12chars_format): New alias to
 	_ZSt10from_charsPKcS0_Ru9__ieee128St12chars_format.
 	* src/c++17/floating_to_chars.cc (_ZSt8to_charsPcS_DF128_): New alias to
 	_ZSt8to_charsPcS_u9__ieee128.
 	(_ZSt8to_charsPcS_DF128_St12chars_format): New alias to
 	_ZSt8to_charsPcS_u9__ieee128St12chars_format.
 	(_ZSt8to_charsPcS_DF128_St12chars_formati): New alias to
 	_ZSt8to_charsPcS_u9__ieee128St12chars_formati.
 	* config/abi/post/powerpc64le-linux-gnu/baseline_symbols.txt: Updated.

 2023-05-03  Jakub Jelinek  <jakub@redhat.com>

 	* configure.host (abi_baseline_pair): Use powerpc64le-linux-gnu
 	rather than powerpc64-linux-gnu for powerpc64le*-linux*.
 	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Remove
 	_ZTI*DF128_, _ZTI*DF64x symbols and symbols in
 	GLIBCXX_IEEE128_3.4.{29,30,31} and CXXABI_IEEE128_1.3.13 symbol
 	versions.
 	* config/abi/post/powerpc64le-linux-gnu/baseline_symbols.txt: New
 	file.

 2023-05-03  Kefu Chai  <kefu.chai@scylladb.com>
 	    Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109703
 	* include/bits/basic_string.h (basic_string(Iter, Iter, Alloc)):
 	Initialize _M_string_length.

 2023-05-02  Jakub Jelinek  <jakub@redhat.com>

 	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
 	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.

 2023-05-02  Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/109694
 	* src/c++98/ios_init.cc: Add #pragma GCC diagnostic ignored for
 	-Wattribute-alias.

 2023-04-28  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/random.h (gamma_distribution): Add to the right
 	doxygen group.
 	(discrete_distribution, piecewise_constant_distribution)
 	(piecewise_linear_distribution): Create a new doxygen group and
 	fix the incomplete doxygen comments.
 	* include/bits/uniform_int_dist.h (uniform_int_distribution):
 	Add to doxygen group.

 2023-04-28  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/uses_allocator.h: Add missing @file comment.
 	* include/bits/regex.tcc: Remove stray doxygen comments.
 	* include/experimental/memory_resource: Likewise.
 	* include/std/bit: Tweak doxygen @cond comments.
 	* include/std/expected: Likewise.
 	* include/std/numbers: Likewise.

 2023-04-28  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/doxygen/user.cfg.in (STRIP_FROM_PATH): Remove prefixes
 	from header paths.

 2023-04-28  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/move.h: Simplify opening/closing namespace std.

 2023-04-28  Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/108969
 	* config/abi/pre/gnu.ver (GLIBCXX_3.4.32): Export
 	_ZSt21ios_base_library_initv.
 	* testsuite/util/testsuite_abi.cc (check_version): Add GLIBCXX_3.4.32
 	symver and make it the latestp.
 	* src/c++98/ios_init.cc (ios_base_library_init): New alias.
 	* acinclude.m4 (libtool_VERSION): Change to 6:32:0.
 	* include/std/iostream: If init_priority attribute is supported
 	and _GLIBCXX_SYMVER_GNU, force undefined _ZSt21ios_base_library_initv
 	symbol into the object.
 	* configure: Regenerated.

 2023-04-27  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/mofunc_impl.h: Fix typo in doxygen comment.
 	* include/std/format: Likewise.

 2023-04-27  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/doxygen/user.cfg.in (FORMULA_TRANSPARENT, DOT_FONTNAME)
 	(DOT_FONTSIZE, DOT_TRANSPARENT): Remove obsolete options.

 2023-04-27  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/doxygen/user.cfg.in (SOURCE_BROWSER): Only set to YES for
 	HTML docs.
 	* include/bits/gslice_array.h (_DEFINE_VALARRAY_OPERATOR): Omit
 	from doxygen docs.
 	* include/bits/indirect_array.h (_DEFINE_VALARRAY_OPERATOR):
 	Likewise.
 	* include/bits/mask_array.h (_DEFINE_VALARRAY_OPERATOR):
 	Likewise.
 	* include/bits/slice_array.h (_DEFINE_VALARRAY_OPERATOR):
 	Likewise.
 	* include/std/valarray (_DEFINE_VALARRAY_UNARY_OPERATOR)
 	(_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT)
 	(_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT)
 	(_DEFINE_BINARY_OPERATOR): Likewise.

 2023-04-27  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/memory_resource.h: Improve doxygen comments.
 	* include/std/memory_resource: Likewise.

 2023-04-27  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/40380
 	* include/bits/basic_string.h: Improve doxygen comments.
 	* include/bits/cow_string.h: Likewise.
 	* include/bits/forward_list.h: Likewise.
 	* include/bits/fs_dir.h: Likewise.
 	* include/bits/fs_path.h: Likewise.
 	* include/bits/quoted_string.h: Likewise.
 	* include/bits/stl_bvector.h: Likewise.
 	* include/bits/stl_map.h: Likewise.
 	* include/bits/stl_multimap.h: Likewise.
 	* include/bits/stl_multiset.h: Likewise.
 	* include/bits/stl_set.h: Likewise.
 	* include/bits/stl_vector.h: Likewise.
 	* include/bits/unordered_map.h: Likewise.
 	* include/bits/unordered_set.h: Likewise.
 	* include/std/filesystem: Likewise.
 	* include/std/iomanip: Likewise.

 2023-04-27  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/105081
 	* src/c++11/random.cc (__throw_syserr): New function.
 	(random_device::_M_init, random_device::_M_init_pretr1): Use new
 	function for bad tokens.
 	(random_device::_M_getval): Use new function for read errors.
 	* testsuite/util/testsuite_random.h (random_device_available):
 	Change catch handler to use std::system_error.

 2023-04-24  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/max_size_type.h (__max_diff_type::operator>>=):
 	Fix propagation of sign bit.
 	* testsuite/std/ranges/iota/max_size_type.cc: Avoid using the
 	non-standard 'signed typedef-name'.  Add some compile-time tests
 	for right-shifting a negative __max_diff_type value by more than
 	one.

 2023-04-19  Patrick Palka  <ppalka@redhat.com>
 	    Jonathan Wakely  <jwakely@redhat.com>

 	PR c++/100157
 	* include/bits/utility.h (_Nth_type): Conditionally define in
 	terms of __type_pack_element if available.
 	* testsuite/20_util/tuple/element_access/get_neg.cc: Prune
 	additional errors from the new built-in.

 2023-04-19  Jonathan Wakely  <jwakely@redhat.com>

 	Revert:
 	2023-04-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108969
 	* src/Makefile.am: Move globals_io.cc to here.
 	* src/Makefile.in: Regenerate.
 	* src/c++98/Makefile.am: Remove globals_io.cc from here.
 	* src/c++98/Makefile.in: Regenerate.
 	* src/c++98/globals_io.cc [_GLIBCXX_SYMVER_GNU] (cin): Adjust
 	symbol name and then export with GLIBCXX_3.4.31 symver.
 	(cout, cerr, clog, wcin, wcout, wcerr, wclog): Likewise.
 	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/i486-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/pre/gnu.ver: Add iostream objects to new symver.

 2023-04-19  Jonathan Wakely  <jwakely@redhat.com>

 	Revert:
 	2023-04-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108969
 	* config/abi/pre/gnu.ver: Fix preprocessor condition.

 2023-04-18  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/extensions.xml: Fix example to declare and
 	qualify std::free, and use NULL instead of 0.
 	* doc/html/manual/ext_demangling.html: Regenerate.
 	* libsupc++/cxxabi.h: Adjust doxygen comments.

 2023-04-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108969
 	* config/abi/pre/gnu.ver: Fix preprocessor condition.

 2023-04-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108969
 	* src/Makefile.am: Move globals_io.cc to here.
 	* src/Makefile.in: Regenerate.
 	* src/c++98/Makefile.am: Remove globals_io.cc from here.
 	* src/c++98/Makefile.in: Regenerate.
 	* src/c++98/globals_io.cc [_GLIBCXX_SYMVER_GNU] (cin): Adjust
 	symbol name and then export with GLIBCXX_3.4.31 symver.
 	(cout, cerr, clog, wcin, wcout, wcerr, wclog): Likewise.
 	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/i486-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt:
 	Regenerate.
 	* config/abi/pre/gnu.ver: Add iostream objects to new symver.

 2023-04-18  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/108827
 	* include/bits/ranges_cmp.h (__cpp_lib_ranges): Bump value
 	for C++23.
 	* include/std/ranges (range_adaptor_closure): Define for C++23.
 	* include/std/version (__cpp_lib_ranges): Bump value for
 	C++23.
 	* testsuite/std/ranges/version_c++23.cc: Bump expected value
 	of __cpp_lib_ranges.
 	* testsuite/std/ranges/range_adaptor_closure.cc: New test.

 2023-04-18  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_algo.h (__cpp_lib_ranges_contains):
 	Define for C++23.
 	(__cpp_lib_ranges_iota): Likewise.
 	(__cpp_lib_ranges_find_last): Likewise.
 	(__cpp_lib_fold): Rename to ...
 	(__cpp_lib_ranges_fold): ... this.
 	* include/std/version: As above.
 	* testsuite/25_algorithms/fold_left/1.cc: Adjust after
 	renaming __cpp_lib_fold.
 	* testsuite/std/ranges/version_c++23.cc: Verify values
 	of the above feature-test macros.

 2023-04-18  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/109525
 	* include/std/ranges (views::_AsConst::operator()): Add
 	missing const to constant_range test.
 	* testsuite/std/ranges/adaptors/as_const/1.cc (test02):
 	Improve formatting.  Adjust expected type of v2.
 	(test03): New test.

 2023-04-14  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_base.h (const_iterator_t): Define for C++23.
 	(const_sentinel_t): Likewise.
 	(range_const_reference_t): Likewise.
 	(constant_range): Likewise.
 	(__cust_access::__possibly_const_range): Likewise, replacing ...
 	(__cust_access::__as_const): ... this.
 	(__cust_access::_CBegin::operator()): Redefine for C++23 as per P2278R4.
 	(__cust_access::_CEnd::operator()): Likewise.
 	(__cust_access::_CRBegin::operator()): Likewise.
 	(__cust_access::_CREnd::operator()): Likewise.
 	(__cust_access::_CData::operator()): Likewise.
 	* include/bits/ranges_util.h (ranges::__detail::__different_from):
 	Make it an alias of std::__detail::__different_from.
 	(view_interface::cbegin): Define for C++23.
 	(view_interface::cend): Likewise.
 	* include/bits/stl_iterator.h (__detail::__different_from): Define.
 	(iter_const_reference_t): Define for C++23.
 	(__detail::__constant_iterator): Likewise.
 	(__detail::__is_const_iterator): Likewise.
 	(__detail::__not_a_const_iterator): Likewise.
 	(__detail::__iter_const_rvalue_reference_t): Likewise.
 	(__detail::__basic_const_iter_cat):: Likewise.
 	(const_iterator): Likewise.
 	(__detail::__const_sentinel): Likewise.
 	(const_sentinel): Likewise.
 	(basic_const_iterator): Likewise.
 	(common_type<basic_const_iterator<_Tp>, _Up>): Likewise.
 	(common_type<_Up, basic_const_iterator<_Tp>>): Likewise.
 	(common_type<basic_const_iterator<_Tp>, basic_const_iterator<Up>>):
 	Likewise.
 	(make_const_iterator): Define for C++23.
 	(make_const_sentinel): Likewise.
 	* include/std/ranges (__cpp_lib_ranges_as_const): Likewise.
 	(as_const_view): Likewise.
 	(enable_borrowed_range<as_const_view>): Likewise.
 	(views::__detail::__is_ref_view): Likewise.
 	(views::__detail::__can_is_const_view): Likewise.
 	(views::_AsConst, views::as_const): Likewise.
 	* include/std/span (span::const_iterator): Likewise.
 	(span::const_reverse_iterator): Likewise.
 	(span::cbegin): Likewise.
 	(span::cend): Likewise.
 	(span::crbegin): Likewise.
 	(span::crend): Likewise.
 	* include/std/version (__cpp_lib_ranges_as_const): Likewise.
 	* testsuite/std/ranges/adaptors/join.cc (test06): Adjust to
 	behave independently of C++20 vs C++23.
 	* testsuite/std/ranges/version_c++23.cc: Verify value of
 	__cpp_lib_ranges_as_const macro.
 	* testsuite/24_iterators/const_iterator/1.cc: New test.
 	* testsuite/std/ranges/adaptors/as_const/1.cc: New test.

 2023-04-14  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_base.h (__cust_access::__as_const)
 	(__cust_access::_CBegin, __cust::cbegin)
 	(__cust_access::_CEnd, __cust::cend)
 	(__cust_access::_CRBegin, __cust::crbegin)
 	(__cust_access::_CREnd, __cust::crend)
 	(__cust_access::_CData, __cust::cdata): Move down definitions to
 	shortly after the definition of input_range.

 2023-04-14  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_algo.h: Include <optional> for C++23.
 	(__cpp_lib_fold): Define for C++23.
 	(in_value_result): Likewise.
 	(__detail::__flipped): Likewise.
 	(__detail::__indirectly_binary_left_foldable_impl): Likewise.
 	(__detail::__indirectly_binary_left_foldable): Likewise.
 	(___detail:__indirectly_binary_right_foldable): Likewise.
 	(fold_left_with_iter_result): Likewise.
 	(__fold_left_with_iter_fn, fold_left_with_iter): Likewise.
 	(__fold_left_fn, fold_left): Likewise.
 	(__fold_left_first_with_iter_fn, fold_left_first_with_iter):
 	Likewise.
 	(__fold_left_first_fn, fold_left_first): Likewise.
 	(__fold_right_fn, fold_right): Likewise.
 	(__fold_right_last_fn, fold_right_last): Likewise.
 	* include/std/version (__cpp_lib_fold): Likewise.
 	* testsuite/25_algorithms/fold_left/1.cc: New test.
 	* testsuite/25_algorithms/fold_right/1.cc: New test.

 2023-04-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (formatter): Add comment to deleted default
 	constructor of primary template.
 	(_Checking_scanner): Add static_assert.

 2023-04-12  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/using.xml: Document libstdc++exp.a library.
 	* doc/html/*: Regenerate.

 2023-04-12  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/17_intro/names.cc [_AIX]: Do not define policy.
 	* testsuite/19_diagnostics/error_code/cons/lwg3629.cc: Rename
 	namespace to avoid clashing with libc struct.
 	* testsuite/19_diagnostics/error_condition/cons/lwg3629.cc:
 	Likewise.
 	* testsuite/23_containers/unordered_map/96088.cc: Skip on AIX.
 	* testsuite/23_containers/unordered_multimap/96088.cc: Likewise.
 	* testsuite/23_containers/unordered_multiset/96088.cc: Likewise.
 	* testsuite/23_containers/unordered_set/96088.cc: Likewise.
 	* testsuite/experimental/synchronized_value.cc: Require gthreads
 	and add missing option for pthreads targets.

 2023-04-12  Patrick Palka  <ppalka@redhat.com>

 	* include/std/ranges (__cpp_lib_ranges_enumerate): Define
 	for C++23.
 	(__detail::__range_with_movable_reference): Likewise.
 	(enumerate_view): Likewise.
 	(enumerate_view::_Iterator): Likewise.
 	(enumerate_view::_Sentinel): Likewise.
 	(views::__detail::__can_enumerate_view): Likewise.
 	(views::_Enumerate, views::enumerate): Likewise.
 	* include/std/version (__cpp_lib_ranges_enumerate): Likewise.
 	* testsuite/std/ranges/version_c++23.cc: Verify value of
 	__cpp_lib_ranges_enumerate.
 	* testsuite/std/ranges/adaptors/enumerate/1.cc: New test.

 2023-04-12  Patrick Palka  <ppalka@redhat.com>

 	* include/std/ranges (lazy_split_view::_OuterIter::_OuterIter):
 	Propagate _M_trailing_empty in the const-converting constructor
 	as per LWG 3904.
 	* testsuite/std/ranges/adaptors/adjacent/1.cc (test04): Correct
 	assertion.
 	* testsuite/std/ranges/adaptors/lazy_split.cc (test12): New test.

 2023-04-12  Patrick Palka  <ppalka@redhat.com>

 	* src/c++17/floating_from_chars.cc: Include <algorithm>,
 	<iterator>, <limits> and <cstdint>.

 2023-04-12  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/108291
 	* include/std/ranges (chunk_by_view::_M_find_next): Generalize
 	parameter types of the lambda wrapper passed to adjacent_find.
 	(chunk_by_view::_M_find_prev): Likewise.
 	* testsuite/std/ranges/adaptors/chunk_by/1.cc (test04, test05):
 	New tests.

 2023-04-12  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109482
 	* include/experimental/internet (basic_endpoint::basic_endpoint()):
 	Ensure that the required union members are active. Only define
 	as constexpr for C++20 and later.
 	(basic_endpoint::basic_endpoint(const protocol_type&, port_type)):
 	Likewise.
 	* testsuite/experimental/net/internet/endpoint/cons.cc: Only
 	check constexpr default constructor for C++20 and later.
 	* testsuite/experimental/net/internet/endpoint/extensible.cc:
 	Likewise.

 2023-04-12  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdata.zi: Import new file from 2023c release.

 2023-04-05  Arsen Arsenović  <arsen@aarsen.me>

 	* include/precompiled/stdc++.h (C++17): Don't double-include
 	<charconv>, once with wrong conditions.
 	* testsuite/18_support/96817.cc: Require hosted.
 	* testsuite/18_support/bad_exception/59392.cc: Ditto.
 	* testsuite/20_util/scoped_allocator/108952.cc: Ditto.
 	* testsuite/20_util/uses_allocator/lwg3527.cc: Ditto.
 	* testsuite/29_atomics/atomic/operators/pointer_partial_void.cc:
 	Ditto.

 2023-04-05  Arsen Arsenović  <arsen@aarsen.me>

 	* include/bits/c++config: When __STDC_HOSTED__ is zero,
 	disable _GLIBCXX_DEBUG and, if it was set, enable
 	_GLIBCXX_ASSERTIONS.
 	* testsuite/lib/libstdc++.exp (check_v3_target_debug_mode):
 	Include <bits/c++config.h> when determining whether debug is
 	set, in order to inherit the logic from above

 2023-04-05  Arsen Arsenović  <arsen@aarsen.me>

 	* testsuite/17_intro/versionconflict.cc: New test.
 	* include/std/version: Allow disabling the system_header pragma
 	via _GLIBCXX_TESTING_SYSHDR.

 2023-04-05  Arsen Arsenović  <arsen@aarsen.me>

 	* include/bits/unique_ptr.h (__cpp_lib_constexpr_memory):
 	Synchronize the definition block with...
 	* include/bits/ptr_traits.h (__cpp_lib_constexpr_memory):
 	... this one here.  Also define the 202202L value, rather than
 	leaving it up to purely unique_ptr.h, so that the value is
 	synchronized across all headers.
 	(__gnu_debug::_Safe_iterator_base): Move into new conditional
 	block.
 	* include/std/memory (__cpp_lib_atomic_value_initialization):
 	Define on freestanding under the same conditions as in
 	atomic_base.h.
 	* include/std/version (__cpp_lib_robust_nonmodifying_seq_ops):
 	Also define on freestanding.
 	(__cpp_lib_to_chars): Ditto.
 	(__cpp_lib_gcd): Ditto.
 	(__cpp_lib_gcd_lcm): Ditto.
 	(__cpp_lib_raw_memory_algorithms): Ditto.
 	(__cpp_lib_array_constexpr): Ditto.
 	(__cpp_lib_nonmember_container_access): Ditto.
 	(__cpp_lib_clamp): Ditto.
 	(__cpp_lib_constexpr_char_traits): Ditto.
 	(__cpp_lib_constexpr_string): Ditto.
 	(__cpp_lib_sample): Ditto.
 	(__cpp_lib_lcm): Ditto.
 	(__cpp_lib_constexpr_iterator): Ditto.
 	(__cpp_lib_constexpr_char_traits): Ditto.
 	(__cpp_lib_interpolate): Ditto.
 	(__cpp_lib_constexpr_utility): Ditto.
 	(__cpp_lib_shift): Ditto.
 	(__cpp_lib_ranges): Ditto.
 	(__cpp_lib_move_iterator_concept): Ditto.
 	(__cpp_lib_constexpr_numeric): Ditto.
 	(__cpp_lib_constexpr_functional): Ditto.
 	(__cpp_lib_constexpr_algorithms): Ditto.
 	(__cpp_lib_constexpr_tuple): Ditto.
 	(__cpp_lib_constexpr_memory): Ditto.

 2023-04-05  John David Anglin  <danglin@gcc.gnu.org>

 	* testsuite/22_locale/locale/cons/12658_thread-2.cc: Double
 	timeout factor on hppa*-*-*.

 2023-04-05  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/regex.h (sub_match::swap): New function.
 	* testsuite/28_regex/sub_match/lwg3204.cc: New test.

 2023-04-04  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/extensions.xml: Remove std::bad_exception from
 	example program.
 	* doc/html/manual/ext_demangling.html: Regenerate.

 2023-03-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR tree-optimization/107087
 	* include/bits/cow_string.h (basic_string::size()): Add
 	optimizer hint that _S_empty_rep()._M_length is always zero.
 	(basic_string::length()): Call size().

 2023-03-31  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109339
 	* include/std/stop_token (_Stop_state_ptr(const stop_source&)):
 	Add attribute access with access-mode 'none'.
 	* testsuite/30_threads/stop_token/stop_source/109339.cc: New test.

 2023-03-31  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (ip::basic_endpoint::_M_if_v6):
 	Revert change from member function to data member. Fix for
 	constant evaluation by detecting which union member is active.
 	(ip::basic_endpoint::resize): Revert changes to update _M_is_v6
 	flag.

 2023-03-29  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109242
 	* testsuite/20_util/optional/monadic/pr109340.cc: Moved to...
 	* testsuite/20_util/optional/monadic/pr109242.cc: ...here.

 2023-03-29  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (ip::make_address): Implement
 	missing overload.
 	(ip::address_v4::broadcast()): Avoid undefined shift.
 	(ip::basic_endpoint): Fix member functions for constexpr.
 	(ip::basic_endpoint::_M_is_v6): Replace member function with
 	data member, adjust member functions using it.
 	(ip::basic_endpoint::resize): Update _M_is_v6 based on sockaddr
 	content.
 	* testsuite/experimental/net/internet/address/v4/cons.cc: Fix
 	constexpr checks to work in C++14.
 	* testsuite/experimental/net/internet/address/v4/creation.cc:
 	Likewise.
 	* testsuite/experimental/net/internet/endpoint/cons.cc:
 	Likewise.
 	* testsuite/experimental/net/internet/network/v4/cons.cc:
 	Likewise.
 	* testsuite/experimental/net/internet/network/v4/members.cc:
 	Likewise.
 	* testsuite/experimental/net/internet/endpoint/extensible.cc: New test.

 2023-03-29  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/expected (expected::value() &): Use const lvalue
 	for unex member passed to bad_expected_access constructor, as
 	per LWG 3843.

 2023-03-29  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109340
 	* include/std/expected (expected::transform): Use
 	std::remove_cv_t instead of std::remove_cvref_t.
 	(expected::transform_error): Likewise.
 	(expected<cv void, E>::transform): Likewise.
 	(expected<cv void, E>::transform_error): Likewise.
 	* include/std/optional (transform): Use std::remove_cv_t.
 	* testsuite/20_util/optional/monadic/pr109340.cc: New test.

 2023-03-29  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/optional (optional): Adjust static assertion to
 	reject arrays and functions as well as references.
 	* testsuite/20_util/optional/requirements_neg.cc: New test.

 2023-03-28  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/103387
 	* include/bits/istream.tcc (istream::_M_extract(ValueT&)): Use
 	std::use_facet instead of cached _M_num_get facet.
 	(istream::operator>>(short&)): Likewise.
 	(istream::operator>>(int&)): Likewise.
 	* include/bits/ostream.tcc (ostream::_M_insert(ValueT)): Use
 	std::use_facet instead of cached _M_num_put facet.

 2023-03-28  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/char_traits.h (char_traits::copy): Return without
 	using memcpy if n==0.
 	(char_traits::assign): Likewise for memset.

 2023-03-28  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109299
 	* include/bits/basic_string.h (basic_string::_M_is_local()): Add
 	hint for compiler that local strings fit in the local buffer.

 2023-03-28  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109288
 	* include/std/chrono (__detail::__get_leap_second_info): Update
 	expiry date of hardcoded leapseconds list.
 	* src/c++20/tzdb.cc (tzdb_list::_Node::_S_read_leap_seconds()):
 	Likewise.
 	* src/c++20/tzdata.zi: Import new file from 2023a release.
 	* testsuite/std/time/time_zone/get_info_local.cc: Only check
 	transitions for Egypt up to 2014.

 2023-03-28  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd.h (is_simd_flag_type): New.
 	(_IsSimdFlagType): New.
 	(copy_from, copy_to, load ctors): Constrain _Flags using
 	_IsSimdFlagType.

 2023-03-28  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_x86.h (_SimdImplX86): Use
 	_Base::_S_divides if the optimized _S_divides function is hidden
 	via the preprocessor.

 2023-03-27  Jakub Jelinek  <jakub@redhat.com>

 	* testsuite/experimental/net/timer/waitable/dest.cc: Avoid -Wformat
 	warning if size_t is not unsigned long.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/shared_ptr_atomic.h (atomic::operator=(nullptr_t)):
 	Add overload, as per LWG 3893.
 	* testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
 	Check assignment from nullptr.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (formatter<const charT[N], charT>): Do not
 	define partial speclialization, as per LWG 3833.
 	* testsuite/std/format/formatter/requirements.cc: Check it.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/utility (__cpp_lib_constexpr_algorithms): Define,
 	as per LWG 3792.
 	* testsuite/20_util/exchange/constexpr.cc: Check for it.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/version (__cpp_lib_format): Define.
 	* testsuite/std/format/functions/format.cc: Check it.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/basic_string.tcc (basic_string::resize_and_overwrite):
 	Pass rvalues to the callback, as now allowed by LWG 3645.
 	Enforce preconditions on the return value.
 	* testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 	Adjust.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format: Add a comment noting that the resolution
 	of LWG 3720 has been applied..

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/regex.h (match_results): Add allocator-extended
 	copy and move constructors, as per LWG 2195.
 	* testsuite/28_regex/match_results/ctors/char/alloc.cc: New test.

 2023-03-22  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/stream_iterator.h (istream_iterator): Add
 	constexpr to copy constructor, as per LWG 3600.
 	* testsuite/24_iterators/istream_iterator/cons/constexpr.cc:
 	Check copy construction.

 2023-03-21  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_x86.h
 	(_SimdImplX86::_S_divides): Replace test for __GCC_IEC_559 == 0
 	with __RECIPROCAL_MATH__.

 2023-03-21  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_detail.h: Don't define
 	_GLIBCXX_SIMD_WORKAROUND_PR90993 for Clang.
 	* include/experimental/bits/simd_x86.h (_S_divides): Remove
 	check for __clang__.

 2023-03-21  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_detail.h: Don't declare the
 	simd API as constexpr with Clang.
 	* include/experimental/bits/simd_x86.h (__movm): New.
 	(_S_blend_avx512): Resolve FIXME. Implement blend using __movm
 	and ?:.
 	(_SimdImplX86::_S_masked_unary): Clang does not implement the
 	same builtins. Implement the function using __movm, ?:, and -
 	operators on vector_size types instead.

 2023-03-21  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/tests/operators.cc: Clang doesn't
 	define __GCC_IEC_559. Use __STDC_IEC_559__ instead.

 2023-03-20  Jonathan Wakely  <jwakely@redhat.com>

 	* src/filesystem/ops-common.h (get_temp_directory_from_env): Fix
 	formatting.

 2023-03-20  Marek Polacek  <polacek@redhat.com>

 	PR c++/109159
 	* testsuite/20_util/pair/cons/explicit_construct.cc: Adjust dg-error.
 	* testsuite/20_util/tuple/cons/explicit_construct.cc: Likewise.
 	* testsuite/23_containers/span/explicit.cc: Likewise.

 2023-03-20  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109182
 	* include/std/expected (expected<void>::expected(in_place_t)):
 	Remove template-head.

 2023-03-18  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109165
 	* testsuite/18_support/coroutines/hash.cc: Use const object
 	in second call.

 2023-03-17  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109165
 	* include/std/coroutine (hash<>::operator()): Add const.
 	* testsuite/18_support/coroutines/hash.cc: New test.

 2023-03-14  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/109111
 	* include/std/ranges (repeat_view): Remove redundant parentheses
 	in requires-clause.
 	(repeat_view::_Iterator): Correct the requires-clause.

 2023-03-14  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/stl_iterator.h (move_iterator::_S_iter_concept):
 	Define.
 	(__cpp_lib_move_iterator_concept): Define for C++20.
 	(move_iterator::iterator_concept): Strengthen as per P2520R0.
 	* include/std/version (__cpp_lib_move_iterator_concept): Define
 	for C++20.
 	* testsuite/24_iterators/move_iterator/p2520r0.cc: New test.

 2023-03-14  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_util.h (view_interface::empty): Add
 	preferred overloads that use ranges::size when the range is
 	sized as per LWG 3715.
 	* testsuite/std/ranges/adaptors/lwg3715.cc: New test.

 2023-03-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono.h (__is_duration_v, __is_time_point_v):
 	Only define for C++17 and later.

 2023-03-14  Jonathan Wakely  <jwakely@redhat.com>

 	* src/Makefile.am: Add comment about linker script fragments.
 	* src/Makefile.in: Regenerate.

 2023-03-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/62196
 	* include/bits/mask_array.h (mask_array): Add assertions to
 	assignment operators.
 	* include/std/valarray (valarray::operator[](valarray<bool>)):
 	Add assertions.
 	* testsuite/26_numerics/valarray/mask-1_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-2_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-3_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-4_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-5_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-6_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-7_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask-8_neg.cc: New test.
 	* testsuite/26_numerics/valarray/mask.cc: New test.

 2023-03-13  Jakub Jelinek  <jakub@redhat.com>

 	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.

 2023-03-13  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/Makefile.am: Add comment referring to documentation.
 	* doc/Makefile.in: Regenerate.

 2023-03-13  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/html/*: Regenerate.

 2023-03-13  Jonny Grant  <jg@jguk.org>

 	* doc/xml/faq.xml: Update copyright year.

 2023-03-13  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/allocator.h: Fix typo in comment.

 2023-03-12  Jakub Jelinek  <jakub@redhat.com>

 	* config/abi/pre/gnu.ver (CXXABI_1.3.14): Also export __bf16 tinfos
 	if it isn't mangled as DF16b but u6__bf16.

 2023-03-12  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/documentation_hacking.xml: Move www.graphviz.org
 	to https.
 	* doc/html/manual/documentation_hacking.html: Regenerate.

 2023-03-10  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/109064
 	* python/libstdcxx/v6/xmethods.py (SharedPtrUseCountWorker):
 	Remove self-recursion in __init__. Add missing _supports.
 	* testsuite/libstdc++-xmethods/shared_ptr.cc: Check use_count()
 	and unique().

 2023-03-09  Patrick Palka  <ppalka@redhat.com>

 	* include/std/ranges
 	(cartesian_product_view::_Iterator::_Iterator): Remove
 	constraint on default constructor as per LWG 3849.
 	(cartesian_product_view::_Iterator::_M_prev): Adjust position
 	of _Nm > 0 test as per LWG 3820.
 	(cartesian_product_view::_Iterator::_M_advance): Perform bounds
 	checking only on sized cartesian products.
 	* testsuite/std/ranges/cartesian_product/1.cc (test08): New test.

 2023-03-09  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/109024
 	* include/std/ranges (chunk_by_view::_M_pred): Remove DMI as per
 	LWG 3796.
 	(repeat_view::_M_pred): Likewise.
 	* testsuite/std/ranges/adaptors/chunk_by/1.cc (test03): New test.
 	* testsuite/std/ranges/repeat/1.cc (test05): New test.

 2023-03-09  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/108362
 	* include/std/ranges (__detail::__can_single_view): New concept.
 	(_Single::operator()): Constrain it.  Move [[nodiscard]] to the
 	end of the function declarator.
 	(__detail::__can_iota_view): New concept.
 	(_Iota::operator()): Constrain it.  Move [[nodiscard]] to the
 	end of the function declarator.
 	(__detail::__can_istream_view): New concept.
 	(_Istream::operator()): Constrain it.  Move [[nodiscard]] to the
 	end of the function declarator.
 	* testsuite/std/ranges/iota/iota_view.cc (test07): New test.
 	* testsuite/std/ranges/istream_view.cc (test08): New test.
 	* testsuite/std/ranges/single_view.cc (test07): New test.

 2023-03-09  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/107572
 	* include/std/ranges (cartesian_product_view::end): When
 	building the tuple of iterators, avoid calling ranges::begin on
 	the first range if __empty_tail is false.
 	* testsuite/std/ranges/cartesian_product/1.cc (test07): New test.

 2023-03-09  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108882
 	* config/os/gnu-linux/ldbl-ieee128-extra.ver: Fix incorrect
 	patterns.

 2023-03-07  Jakub Jelinek  <jakub@redhat.com>

 	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
 	* config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.

 2023-03-07  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108882
 	* config/abi/pre/gnu.ver (GLIBCXX_3.4.31): Adjust patterns to
 	not match symbols in namespace std::__gnu_cxx11_ieee128.
 	* config/os/gnu-linux/ldbl-ieee128-extra.ver: Add patterns for
 	std::__gnu_cxx11_ieee128::money_{get,put}.

 2023-03-07  Jonathan Wakely  <jwakely@redhat.com>

 	* libsupc++/eh_personality.cc: Fix spelling in comment.

 2023-03-03  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/30_threads/async/async.cc (test04): Initialize
 	steady_start, renamed from steady_begin, next to slow_start.
 	Increase tolerance for final wait.

 2023-03-03  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/libstdc++-prettyprinters/80276.cc: Add
 	std::string to debug info.
 	* testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.

 2023-03-03  Alexandre Oliva  <oliva@adacore.com>

 	PR libstdc++/104852
 	PR libstdc++/95989
 	PR libstdc++/52590
 	* include/bits/std_thread.h (thread::_M_thread_deps): New
 	static implicitly-inline member function.
 	(std::thread template ctor): Pass it to _M_start_thread.
 	* src/c++11/thread.cc (thread::_M_start_thread): Name depend
 	parameter, force it live on entry.

 2023-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

 	* config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
 	* config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
 	Likewise.
 	* config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
 	* config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
 	Likewise.

 2023-03-01  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/cow_string.h: Fix typo in comment.

 2023-03-01  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (chrono::tzdb::current_zone()) Use "UTC" if
 	current time zone cannot be determined.
 	* testsuite/std/time/tzdb/1.cc: Remove conditions based on
 	HAVE_TZDB macro and test all members unconditionally.

 2023-02-28  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108952
 	* include/bits/uses_allocator_args.h
 	(uses_allocator_construction_args): Implement LWG 3527.
 	* testsuite/20_util/pair/astuple/get-2.cc: New test.
 	* testsuite/20_util/scoped_allocator/108952.cc: New test.
 	* testsuite/20_util/uses_allocator/lwg3527.cc: New test.

 2023-02-28  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108846
 	* include/bits/stl_algobase.h (__copy_move<false, false, RA>)
 	Add __assign_one static member function.
 	(__copy_move<true, false, RA>): Likewise.
 	(__copy_move<IsMove, true, RA>): Do not use memmove for a single
 	value.
 	(__copy_move_backward<IsMove, true, RA>): Likewise.
 	* testsuite/25_algorithms/copy/108846.cc: New test.
 	* testsuite/25_algorithms/copy_backward/108846.cc: New test.
 	* testsuite/25_algorithms/copy_n/108846.cc: New test.
 	* testsuite/25_algorithms/move/108846.cc: New test.
 	* testsuite/25_algorithms/move_backward/108846.cc: New test.

 2023-02-28  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++11/codecvt.cc: Add [[likely]] and [[unlikely]]
 	attributes.

 2023-02-27  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/basic_ios.h (basic_ios::_M_setstate): Add
 	caveat to comment.
 	* include/bits/basic_string.h (resize_and_overwrite): Add
 	doxygen comment.

 2023-02-24  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd.h: Line breaks and indenting
 	fixed to follow the libstdc++ standard.
 	* include/experimental/bits/simd_builtin.h: Likewise.
 	* include/experimental/bits/simd_fixed_size.h: Likewise.
 	* include/experimental/bits/simd_neon.h: Likewise.
 	* include/experimental/bits/simd_ppc.h: Likewise.
 	* include/experimental/bits/simd_scalar.h: Likewise.
 	* include/experimental/bits/simd_x86.h: Likewise.

 2023-02-24  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/108030
 	* include/experimental/bits/simd_fixed_size.h
 	(_SimdImplFixedSize::_S_broadcast): Replace inline with
 	_GLIBCXX_SIMD_INTRINSIC.
 	(_SimdImplFixedSize::_S_generate): Likewise.
 	(_SimdImplFixedSize::_S_load): Likewise.
 	(_SimdImplFixedSize::_S_masked_load): Likewise.
 	(_SimdImplFixedSize::_S_store): Likewise.
 	(_SimdImplFixedSize::_S_masked_store): Likewise.
 	(_SimdImplFixedSize::_S_min): Likewise.
 	(_SimdImplFixedSize::_S_max): Likewise.
 	(_SimdImplFixedSize::_S_complement): Likewise.
 	(_SimdImplFixedSize::_S_unary_minus): Likewise.
 	(_SimdImplFixedSize::_S_plus): Likewise.
 	(_SimdImplFixedSize::_S_minus): Likewise.
 	(_SimdImplFixedSize::_S_multiplies): Likewise.
 	(_SimdImplFixedSize::_S_divides): Likewise.
 	(_SimdImplFixedSize::_S_modulus): Likewise.
 	(_SimdImplFixedSize::_S_bit_and): Likewise.
 	(_SimdImplFixedSize::_S_bit_or): Likewise.
 	(_SimdImplFixedSize::_S_bit_xor): Likewise.
 	(_SimdImplFixedSize::_S_bit_shift_left): Likewise.
 	(_SimdImplFixedSize::_S_bit_shift_right): Likewise.
 	(_SimdImplFixedSize::_S_remquo): Add inline keyword (to be
 	explicit about not always-inline, yet).
 	(_SimdImplFixedSize::_S_isinf): Likewise.
 	(_SimdImplFixedSize::_S_isfinite): Likewise.
 	(_SimdImplFixedSize::_S_isnan): Likewise.
 	(_SimdImplFixedSize::_S_isnormal): Likewise.
 	(_SimdImplFixedSize::_S_signbit): Likewise.

 2023-02-24  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/108856
 	* include/experimental/bits/simd_builtin.h
 	(_SimdImplBuiltin::_S_masked_unary): More efficient
 	implementation of masked inc-/decrement for integers and floats
 	without AVX2.
 	* include/experimental/bits/simd_x86.h
 	(_SimdImplX86::_S_masked_unary): New. Use AVX512 masked subtract
 	builtins for masked inc-/decrement.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/executor (executor): Constrain template
 	constructors.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (basic_endpoint): Add missing
 	constexpr to comparison operators.
 	* testsuite/experimental/net/internet/endpoint/cons.cc: New test.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (network_v4::netmask()): Avoid
 	undefined shift.
 	(network_v4::broadcast()): Optimize and fix for targets with
 	uint_least32_t wider than 32 bits.
 	(network_v4::to_string(const Allocator&)): Fix for custom
 	allocators and optimize using to_chars.
 	(operator==(const network_v4&, const network_v4&)): Add missing
 	constexpr.
 	(operator==(const network_v6&, const network_v6&)): Likewise.
 	* testsuite/experimental/net/internet/network/v4/cons.cc: New test.
 	* testsuite/experimental/net/internet/network/v4/members.cc: New test.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (address_4(const bytes_type&)):
 	Use __builtin_bit_cast if available, otherwise convert to
 	network byte order.
 	(address_v4::to_bytes()): Likewise, but convert from network
 	byte order.
 	* testsuite/experimental/net/internet/address/v4/cons.cc: Fix
 	incorrect tests. Check for constexpr too.
 	* testsuite/experimental/net/internet/address/v4/creation.cc:
 	Likewise.
 	* testsuite/experimental/net/internet/address/v4/members.cc:
 	Check that bytes_type is a standard-layout type.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/internet (address_v4::to_string):
 	Optimize.
 	* testsuite/experimental/net/internet/address/v4/members.cc:
 	Check more addresses.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* include/ext/aligned_buffer.h (__aligned_buffer): Add
 	diagnostic pragmas.

 2023-02-24  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/format/arguments/lwg3810.cc: Move dg-options
 	before dg-do.

 2023-02-23  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/tests/reductions.cc: Introduce
 	max_distance as the type-dependent max error.

 2023-02-23  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_builtin.h (_S_set): Compare as
 	int. The actual range of these indexes is very small.

 2023-02-23  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_x86.h (_S_bit_shift_left)
 	(_S_bit_shift_right): Declare constexpr. The implementation was
 	already expecting constexpr evaluation.

 2023-02-23  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/108030
 	* include/experimental/bits/simd_detail.h
 	(_GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA): Define as empty for
 	__clang__.

 2023-02-23  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/108030
 	* include/experimental/bits/simd.h (__vector_broadcast):
 	Implement via __vector_broadcast_impl instead of
 	__call_with_n_evaluations + 2 lambdas.
 	(__vector_broadcast_impl): New.

 2023-02-22  Alexandre Oliva  <oliva@adacore.com>

 	* src/c++11/shared_ptr.cc (__gnu_internal::get_mutex):
 	Avoid destruction of the mutex pool.

 2023-02-22  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/27_io/basic_ofstream/open/char/noreplace.cc: xfail
 	on vxworks.
 	* testsuite/27_io/basic_ofstream/open/wchar_t/noreplace.cc:
 	Likewise.

 2023-02-22  Alexandre Oliva  <oliva@adacore.com>

 	* testsuite/17_intro/names.cc: Undef func on vxworks >= 7 in
 	kernel mode.

 2023-02-20  Andreas Schwab  <schwab@linux-m68k.org>

 	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.

 2023-02-20  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd.h (__extract_part, split):
 	Use reserved name for template parameter.

 2023-02-20  Andreas Schwab  <schwab@suse.de>

 	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.

 2023-02-18  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/faq.xml: Switch two links to www.open-std.org to https.
 	* doc/html/faq.html: Regenerate.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_math.h (__hypot): Bitcasting
 	between scalars requires the __bit_cast helper function instead
 	of simd_bit_cast.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd_x86.h
 	(_SimdImplX86::_S_not_equal_to, _SimdImplX86::_S_less)
 	(_SimdImplX86::_S_less_equal): Do not call
 	__builtin_is_constant_evaluated in constexpr-if.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/tests/bits/verify.h
 	(verify::verify): Use %zx for size_t in format string.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/generate_makefile.sh: Generate and
 	pre-compile pch.h, which includes all headers that do not depend
 	on command-line macros.
 	* testsuite/experimental/simd/tests/bits/main.h: New file.
 	(iterate_abis, main): Moved from verify.h.
 	* testsuite/experimental/simd/tests/bits/verify.h
 	(iterate_abis, main): Moved to main.h.
 	* testsuite/experimental/simd/tests/bits/conversions.h: Add
 	include guard.
 	(genHalfBits): Simplify.
 	* testsuite/experimental/simd/tests/bits/make_vec.h: Add include
 	guard.
 	(make_alternating_mask): Moved from mask_loadstore.
 	* testsuite/experimental/simd/tests/bits/mathreference.h: Add
 	include guard.
 	* testsuite/experimental/simd/tests/bits/test_values.h: Ditto.
 	* testsuite/experimental/simd/tests/mask_loadstore.cc
 	(make_mask, make_alternating_mask): Removed.
 	* testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
 	* testsuite/experimental/simd/tests/operators.cc (genHalfBits):
 	Removed.
 	* testsuite/experimental/simd/tests/abs.cc: Only include
 	bits/main.h.
 	Ditto.
 	* testsuite/experimental/simd/tests/algorithms.cc: Ditto.
 	* testsuite/experimental/simd/tests/broadcast.cc: Ditto.
 	* testsuite/experimental/simd/tests/casts.cc: Ditto.
 	* testsuite/experimental/simd/tests/fpclassify.cc: Ditto.
 	* testsuite/experimental/simd/tests/frexp.cc: Ditto.
 	* testsuite/experimental/simd/tests/generator.cc: Ditto.
 	* testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
 	* testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
 	* testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
 	* testsuite/experimental/simd/tests/loadstore.cc: Ditto.
 	* testsuite/experimental/simd/tests/logarithm.cc: Ditto.
 	* testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
 	* testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
 	* testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
 	* testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
 	* testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
 	* testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
 	* testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
 	* testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
 	* testsuite/experimental/simd/tests/reductions.cc: Ditto.
 	* testsuite/experimental/simd/tests/remqo.cc: Ditto.
 	* testsuite/experimental/simd/tests/simd.cc: Ditto.
 	* testsuite/experimental/simd/tests/sincos.cc: Ditto.
 	* testsuite/experimental/simd/tests/split_concat.cc: Ditto.
 	* testsuite/experimental/simd/tests/splits.cc: Ditto.
 	* testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
 	* testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
 	* testsuite/experimental/simd/tests/where.cc: Ditto.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	* testsuite/experimental/simd/README.md: Document the timeout
 	and timeout-factor directives. Minor typo fixed.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	PR libstdc++/108030
 	* include/experimental/bits/simd_detail.h: Define
 	_GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA.
 	* include/experimental/bits/simd.h: Annotate lambdas with
 	_GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA.
 	* include/experimental/bits/simd_builtin.h: Ditto.
 	* include/experimental/bits/simd_converter.h: Ditto.
 	* include/experimental/bits/simd_fixed_size.h: Ditto.
 	* include/experimental/bits/simd_math.h: Ditto.
 	* include/experimental/bits/simd_neon.h: Ditto.
 	* include/experimental/bits/simd_x86.h: Ditto.

 2023-02-16  Matthias Kretz  <m.kretz@gsi.de>

 	* include/experimental/bits/simd.h
 	(_SimdWrapper::_M_is_constprop_none_of)
 	(_SimdWrapper::_M_is_constprop_all_of): Return false unless the
 	computed result still satisfies __builtin_constant_p.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/format/arguments/lwg3810.cc: Replace UTF-8
 	ellipsis character.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/Makefile.am: Add new header.
 	* include/Makefile.in: Regenerate.
 	* include/experimental/synchronized_value: New file.
 	* testsuite/experimental/synchronized_value.cc: New test.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/experimental/optional: Fix header name in comment.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/format (__format::_Arg_store): New class template.
 	(basic_format_args): Remove nested type _Store and add deduction
 	guide from _Arg_store.
 	(basic_format_arg, make_format_args): Adjust.
 	* testsuite/std/format/arguments/lwg3810.cc: New test.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/stl_pair.h (pair) [C++20]: Add non-dangling
 	constraints to constructors and add deleted overloads for the
 	dangling cases, as per P2255R2.
 	(pair) [!C++20 && _GLIBCXX_DEBUG]: Add static assertions to
 	make dangling cases ill-formed.
 	* testsuite/20_util/pair/dangling_ref.cc: New test.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/17_intro/names_pstl.cc: Require et tbb_backend.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/ext/throw_allocator.h: Use reserved names for
 	parameters.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/17_intro/names_pstl.cc: Add space after effective
 	target name.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/pstl/algorithm_fwd.h (__pattern_search_n)
 	(__brick_unique_copy, __brick_adjacent_find)
 	(__brick_generate_n, __pattern_generate_n): Use reserved names
 	for parameters.
 	* include/pstl/algorithm_impl.h (__brick_unique_copy)
 	(__pattern_reverse, __brick_generate_n): Likewise.
 	* include/pstl/execution_impl.h (__prefer_unsequenced_tag)
 	(__prefer_parallel_tag): Likewise.
 	* include/pstl/glue_algorithm_impl.h (transform): Likewise.
 	* include/pstl/glue_numeric_defs.h (adjacent_difference):
 	Likewise.
 	* include/pstl/numeric_impl.h (__brick_adjacent_difference):
 	Likewise.
 	* include/pstl/parallel_backend_tbb.h (__merge_func): Likewise.
 	* include/pstl/unseq_backend_simd.h (_Combiner)
 	(__simd_min_element, __simd_minmax_element): Likewise.
 	* testsuite/17_intro/names_pstl.cc: New test.

 2023-02-16  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/fs_ops.h (create_directory): Use reserved name
 	for parameter.
 	* include/bits/ranges_algo.h (__contains_subrange_fn):
 	Likewise.
 	* include/bits/regex_automaton.h (_State_base::_M_print):
 	Likewise.
 	* include/bits/regex_automaton.tcc(_State_base::_M_print):
 	Likewise.
 	* include/bits/regex_scanner.tcc(_Scanner::_M_print): Likewise.
 	* include/experimental/bits/fs_ops.h (create_directory):
 	Likewise.
 	* include/std/mutex (timed_mutex::_M_clocklock): Likewise.
 	(recursive_timed_mutex:_M_clocklock): Likewise.
 	* include/std/tuple (basic_common_reference): Likewise.
 	* libsupc++/cxxabi_init_exception.h
 	(__cxa_init_primary_exception): Likewise.
 	* testsuite/17_intro/names.cc: Add checks.

 2023-02-14  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/status_cxx2017.xml: Update an open-std.org link
 	to www.open-std.org and https.
 	* doc/html/manual/status.html: Regenerate.

 2023-02-14  Thomas W Rodgers  <rodgert@twrodgers.com>

 	PR libstdc++/103934
 	* include/std/atomic (atomic_flag_wait): Add.
 	(atomic_flag_wait_explicit): Add.
 	(atomic_flag_notify): Add.
 	(atomic_flag_notify_explicit): Add.
 	* testsuite/29_atomics/atomic_flag/wait_notify/1.cc:
 	Add test case to cover missing atomic_flag free functions.

 2023-02-14  Thomas W Rodgers  <rodgert@twrodgers.com>

 	PR libstdc++/103934
 	* include/std/atomic (atomic_flag_test): Add.
 	(atomic_flag_test_explicit): Add.
 	* testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
 	test case to cover missing atomic_flag free functions.
 	* testsuite/29_atomics/atomic_flag/test/implicit.cc:
 	Likewise.

 2023-02-13  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/policy_data_structures_biblio.xml: Adjust
 	"The Component Object Model" reference.
 	* doc/html/manual/policy_data_structures.html: Regenerate.

 2023-02-12  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/containers.xml: Tweak a link to N1780
 	(C++ standard).
 	* doc/html/manual/associative.html: Regenerate.

 2023-02-12  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/ctype.xml: Change www.unix.org to unix.org.
 	* doc/html/manual/facets.html: Regenerate.

 2023-02-11  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/policy_data_structures_biblio.xml: Update
 	link to "Worst-case efficient priority queues".
 	* doc/html/manual/policy_data_structures.html: Regenerate.

 2023-02-06  Arsen Arsenović  <arsen@aarsen.me>

 	* doc/xml/manual/using.xml: Document newly-freestanding
 	headers and the effect of the -ffreestanding flag.
 	* doc/xml/manual/status_cxx2023.xml: Document P1642R11 as
 	completed.
 	* doc/xml/manual/configure.xml: Document that hosted installs
 	respect __STDC_HOSTED__.
 	* doc/xml/manual/test.xml: Document how to run tests in
 	freestanding mode.
 	* doc/html/*: Regenerate.

 2023-02-06  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/ranges_algo.h (__find_last_fn): Rename T to _Tp.
 	(__find_last_if_fn): Likewise.

 2023-02-06  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/type_traits: Add diagnostic pragmas around
 	references to deprecated std::aligned_storage and
 	std::aligned_union traits.
 	* testsuite/20_util/aligned_storage/requirements/alias_decl.cc:
 	Add dg-warning for et c++23.
 	* testsuite/20_util/aligned_storage/requirements/explicit_instantiation.cc:
 	Likewise.
 	* testsuite/20_util/aligned_storage/value.cc: Likewise.
 	* testsuite/20_util/aligned_union/1.cc: Likewise.
 	* testsuite/20_util/aligned_union/requirements/alias_decl.cc:
 	Likewise.

 2023-02-06  Nathaniel Shead  <nathanieloshead@gmail.com>

 	* doc/doxygen/user.cfg.in (PREDEFINED): Add new macros.
 	* include/bits/c++config (_GLIBCXX23_DEPRECATED)
 	(_GLIBCXX23_DEPRECATED_SUGGEST): New macros.
 	* include/std/type_traits (aligned_storage, aligned_union)
 	(aligned_storage_t, aligned_union_t): Deprecate for C++23.
 	* testsuite/20_util/aligned_storage/deprecated-2b.cc: New test.
 	* testsuite/20_util/aligned_union/deprecated-2b.cc: New test.

 2023-02-06  Nathaniel Shead  <nathanieloshead@gmail.com>

 	* doc/doxygen/user.cfg.in (PREDEFINED): Update macros.
 	* include/bits/c++config (_GLIBCXX20_DEPRECATED): Make
 	consistent with other 'deprecated' macros.
 	* include/std/type_traits (is_pod, is_pod_v): Use
 	_GLIBCXX20_DEPRECATED_SUGGEST instead.

 2023-02-06  Arsen Arsenović  <arsen@aarsen.me>

 	* Makefile.am [!_GLIBCXX_HOSTED]: Enable src/ subdirectory.
 	* Makefile.in: Regenerate.
 	* src/Makefile.am [!_GLIBCXX_HOSTED]: Omit compatibility files.
 	There's no history to be compatible with.
 	* src/c++11/Makefile.am [!_GLIBCXX_HOSTED]: Omit hosted-only
 	source files from the build.
 	* src/c++17/Makefile.am [!_GLIBCXX_HOSTED]: Likewise.
 	* src/c++20/Makefile.am [!_GLIBCXX_HOSTED]: Likewise.
 	* src/c++98/Makefile.am [!_GLIBCXX_HOSTED]: Likewise.
 	* src/Makefile.in: Regenerate.
 	* src/c++11/Makefile.in: Regenerate.
 	* src/c++17/Makefile.in: Regenerate.
 	* src/c++20/Makefile.in: Regenerate.
 	* src/c++98/Makefile.in: Regenerate.

 2023-02-06  Jonathan Wakely  <jwakely@redhat.com>

 	* src/Makefile.am [GLIBCXX_HOSTED] (SUBDIRS): Do not add
 	filesystem, libbacktrace and experimental.
 	* src/Makefile.in: Regenerate.

 2023-02-04  Hans-Peter Nilsson  <hp@axis.com>

 	PR libstdc++/108672
 	* include/pstl/unseq_backend_simd.h (__simd_or): Use __INT32_TYPE__
 	instead of int32_t.

 2023-02-04  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/documentation_hacking.xml: Adjust link to pdftex.
 	* doc/html/manual/documentation_hacking.html: Regenerate.

 2023-02-04  François Dumont  <fdumont@gcc.gnu.org>

 	* include/bits/basic_string.h (operator=(basic_string&&)): Transfer move-to
 	storage to the move-from instance when allocators are equal.
 	* testsuite/21_strings/basic_string/allocator/char/move_assign.cc (test04):
 	New test case.

 2023-02-03  Samuel Thibault  <samuel.thibault@gnu.org>

 	* config/os/gnu-linux/os_defines.h [!__linux__]
 	(_GLIBCXX_NATIVE_THREAD_ID, _GLIBCXX_GTHREAD_USE_WEAK): Do not define.

 2023-02-03  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_algo.h (__find_last_fn, find_last):
 	Define.
 	(__find_last_if_fn, find_last_if): Define.
 	(__find_last_if_not_fn, find_last_if_not): Define.
 	* testsuite/25_algorithms/find_last/1.cc: New test.
 	* testsuite/25_algorithms/find_last_if/1.cc: New test.
 	* testsuite/25_algorithms/find_last_if_not/1.cc: New test.

 2023-02-03  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_algo.h (out_value_result): Define.
 	(iota_result): Define.
 	(__iota_fn, iota): Define.
 	* testsuite/25_algorithms/iota/1.cc: New test.

 2023-02-03  Patrick Palka  <ppalka@redhat.com>

 	* include/bits/ranges_algo.h (__contains_fn, contains): Define.
 	(__contains_subrange_fn, contains_subrange): Define.
 	* testsuite/25_algorithms/contains/1.cc: New test.
 	* testsuite/25_algorithms/contains_subrange/1.cc: New test.

 2023-02-02  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/abi.xml: Tweak link to ABIcheck project.
 	* doc/html/manual/abi.html: Regenerate.

 2023-02-02  Jonathan Wakely  <jwakely@redhat.com>

 	* src/filesystem/ops-common.h [AVR] (__unsupported): Always use
 	errc::function_not_supported instead of errc::not_supported.

 2023-02-02  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/sstream  (basic_stringbuf::view): Define for old
 	std::string ABI.
 	(basic_istringstream::view, basic_0stringstream::view)
 	(basic_stringstream::view): Likewise.
 	* testsuite/27_io/basic_istringstream/view/char/1.cc: Remove
 	{ dg-require-effective-target cxx11_abi }.
 	* testsuite/27_io/basic_istringstream/view/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc:
 	Likewise.
 	* testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
 	* testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
 	* testsuite/27_io/basic_stringstream/view/wchar_t/1.cc:
 	Likewise.

 2023-02-02  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108636
 	* config/abi/pre/gnu.ver (GLIBCXX_3.4.31): Export shared_ptr
 	conversion operators for directory iterator comparisons with
 	std::default_sentinel_t.
 	* include/bits/fs_path.h (path::path(string_view, _Type))
 	(path::_Cmpt::_Cmpt(string_view, _Type, size_t)): Move inline
 	definitions to ...
 	* src/c++17/fs_path.cc: ... here.
 	* testsuite/27_io/filesystem/path/108636.cc: New test.

 2023-02-02  Jonathan Wakely  <jwakely@redhat.com>

 	* include/std/variant (variant::operator=): Implement resolution
 	of LWG 3585.
 	* testsuite/20_util/variant/lwg3585.cc: New test.

 2023-02-02  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/using_exceptions.xml: Update a www.open-std.org
 	link to https.
 	* doc/html/manual/using_exceptions.html: Regenerate.

 2023-02-02  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/debug.xml: Fix link to online GDB manual.
 	* doc/html/manual/debug.html: Regenerate.

 2023-02-01  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++11/random.cc (random_device::_M_fini): Do not try to
 	close the file handle if the target doesn't support the
 	/dev/random and /dev/urandom files.

 2023-02-01  Jonathan Wakely  <jwakely@redhat.com>

 	* config/os/generic/error_constants.h (errc::value_too_large)
 	[__AVR__]: Define.
 	* src/c++11/system_error.cc
 	(system_category::default_error_condition) [__AVR__]: Only match
 	recognize values equal to EDOM, ERANGE, ENOSYS and EINTR.
 	* src/c++17/fs_ops.cc (fs::current_path) [__AVR__]: Do not check
 	for ENOENT etc. in switch.
 	(fs::remove_all) [__AVR__]: Likewise.
 	* src/filesystem/ops-common.h [__AVR__]: Do not use POSIX open,
 	close etc.

 2023-02-01  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ZONEINFO_DIR) [avr-*-*, msp430-*-*]: Set
 	embed_zoneinfo=no
 	* configure: Regenerate.

 2023-02-01  Hans-Peter Nilsson  <hp@axis.com>

 	PR testsuite/108632
 	* testsuite/std/time/hh_mm_ss/1.cc (size): Add empty
 	struct at end of S0.

 2023-01-30  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/shared_ptr.xml: Move links from both
 	http://open-std.org and http://www.open-std.org to
 	https://www.open-std.org.
 	* doc/html/manual/memory.html: Regenerate.

 2023-01-28  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/appendix_contributing.xml: Adjust link to
 	ISO C++ standard at ANSI.
 	Move link to www.open-std.org to https.
 	* doc/html/manual/appendix_contributing.html: Regenerate.

 2023-01-28  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/documentation_hacking.xml: Move sourceforge.net
 	links to https.
 	* doc/html/manual/documentation_hacking.html: Regenerate.

 2023-01-28  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/abi.xml: Update www.open-std.org link to https.
 	* doc/html/manual/abi.html: Regenerate.

 2023-01-27  Jakub Jelinek  <jakub@redhat.com>

 	PR libstdc++/108568
 	* testsuite/17_intro/names.cc (__unused): For linux or GNU hurd
 	include features.h if present and then check __GLIBC__ and
 	__GLIBC_MINOR__ macros for glibc prior to 2.19, instead of testing
 	__GLIBC_PREREQ which isn't defined yet.

 2023-01-27  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (tzdata_stream): Use constant instead of
 	string literal.

 2023-01-27  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108554
 	* testsuite/23_containers/map/modifiers/108554.cc: Use dg-bogus.

 2023-01-26  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (operator>>(istream&, ZoneInfo&)): Allow
 	rules named "+" for compatibility with older tzdata.zi files.

 2023-01-26  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108554
 	* include/bits/stl_tree.h (_Rb_tree_insert_and_rebalance): Add
 	nonnull attribute.
 	(_Rb_tree_rebalance_for_erase): Add nonnull and returns_nonnull
 	attributes.
 	* testsuite/23_containers/map/modifiers/108554.cc: New test.

 2023-01-26  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108530
 	* src/c++20/tzdb.cc (current_zone): Look for TIMEZONE or ZONE in
 	/etc/sysconfig/clock, not DEFAULT_TIMEZONE.

 2023-01-26  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/intro.xml: Update links to www.open-std.org to
 	use https.
 	* doc/html/manual/bugs.html: Regenerate.

 2023-01-24  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108530
 	* src/c++20/tzdb.cc (current_zone): Look for DEFAULT_TIMEZONE in
 	/etc/sysconfig/clock.

 2023-01-24  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/102301
 	* include/bits/ranges_base.h: Include <bits/stl_iterator.h> for
 	std::make_reverse_iterator.
 	* include/std/tuple: Include <bits/ranges_util.h> for subrange.
 	(make_from_tuple): Add static assertion from P2255 to diagnose
 	dangling references.
 	* testsuite/20_util/tuple/make_from_tuple/dangling_ref.cc: New test.
 	* testsuite/20_util/tuple/make_from_tuple/tuple_like.cc: New test.

 2023-01-23  François Dumont  <fdumont@gcc.gnu.org>

 	* include/debug/safe_iterator.h (_Safe_iterator<>::_Unchecked): New.
 	(_Safe_iterator(const _Safe_iterator&, _Unchecked)): New.
 	(_Safe_iterator::operator++(int)): Use latter.
 	(_Safe_iterator::operator--(int)): Likewise.
 	(_Safe_iterator(_Iterator, const _Safe_sequence_base*)): Remove !_M_insular()
 	check.
 	* include/debug/safe_local_iterator.h (_Safe_local_iterator<>::_Unchecked):
 	New.
 	(_Safe_local_iterator(const _Safe_local_iterator&, _Unchecked)): New.
 	(_Safe_local_iterator::operator++(int)): Use latter.
 	* src/c++11/debug.cc (_S_debug_messages): Add as comment the _Debug_msg_id
 	entry associated to the array entry.

 2023-01-18  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/fs_path.h (u8path): Add deprecated attribute.
 	* testsuite/27_io/filesystem/path/construct/90281.cc: Add
 	-Wno-deprecated-declarations for C++20 and later.
 	* testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
 	Likewise.
 	* testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
 	* testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 	* testsuite/27_io/filesystem/path/factory/u8path-depr.cc: New test.

 2023-01-18  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/random.h (random_device) [!_GLIBCXX_USE_DEV_RANDOM]:
 	Always call _M_fini and _M_getentropy.

 2023-01-18  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/policy_data_structures_biblio.xml: Adjust links
 	to www.open-std.org to use https.
 	(COM: Component Model Object Technologies): Rename from...
 	(The Component Object Model): ...to.
 	* doc/html/manual/policy_data_structures.html: Regenerate.

 2023-01-18  Dimitrij Mijoski  <dmjpp@hotmail.com>

 	* testsuite/22_locale/codecvt/codecvt_unicode.cc: Simplify.
 	* testsuite/22_locale/codecvt/codecvt_unicode.h: Simplify.
 	* testsuite/22_locale/codecvt/codecvt_unicode_wchar_t.cc: Simplify.

 2023-01-17  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ZONEINFO_DIR): Check $target_os instead
 	of $host. Fix check for file being present during native build.
 	* configure: Regenerate.

 2023-01-17  Martin Liska  <mliska@suse.cz>

 	* src/libbacktrace/Makefile.in: Regenerate.

 2023-01-16  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (_GLIBCXX_USE_CXX11_ABI): Define to 1.

 2023-01-16  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108413
 	* include/c_compatibility/stdatomic.h: Change copyright line to
 	be consistent with other headers contributed under DCO terms.
 	* include/std/expected: Add full stop to copyright line.
 	* src/c++20/tzdb.cc: Likewise.

 2023-01-15  Gerald Pfeifer  <gerald@pfeifer.com>

 	* doc/xml/manual/status_cxx2014.xml: Switch www.open-std.org to
 	https.
 	* doc/xml/manual/status_cxx2017.xml: Ditto.
 	* doc/xml/manual/status_cxx2020.xml: Ditto.
 	* doc/xml/manual/status_cxx2023.xml: Ditto.
 	* doc/html/manual/status.html: Regenerate.

 2023-01-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/time/tzdb_list/1.cc: Remove dg-xfail-run-if
 	and fail gracefully if defining the weak symbol doesn't work.

 2023-01-15  François Dumont  <fdumont@gcc.gnu.org>

 	PR libstdc++/108288
 	* include/debug/safe_iterator.h (_Safe_iterator<>::operator++(int)): Extend deadlock
 	fix to other iterator category.
 	(_Safe_iterator<>::operator--(int)): Likewise.
 	* include/debug/safe_local_iterator.h (_Safe_local_iterator<>::operator++(int)):
 	Fix deadlock.
 	* testsuite/util/debug/unordered_checks.h (invalid_local_iterator_pre_increment): New.
 	(invalid_local_iterator_post_increment): New.
 	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_post_increment_neg.cc:
 	New test.
 	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_pre_increment_neg.cc:
 	New test.

 2023-01-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/30_threads/jthread/jthread.cc: Remove -pthread from
 	dg-options.

 2023-01-15  Jonathan Wakely  <jwakely@redhat.com>

 	* testsuite/std/time/clock/utc/io.cc: Use ctype to widen char.

 2023-01-14  Björn Schäpers  <bjoern@hazardy.de>

 	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Add check for
 	windows.h. Add pecoff as FORMAT_FILE.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* src/libbacktrace/Makefile.am: Regenerate.
 	* src/libbacktrace/Makefile.in: Add pecoff.c as FORMAT_FILE.

 2023-01-14  Björn Schäpers  <bjoern@hazardy.de>

 	* include/std/stacktrace (stacktrace_entry::_S_demangle): Use
 	raw __name if __cxa_demangle could not demangle it.

 2023-01-14  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108409
 	* src/c++20/tzdb.cc (current_zone()) [_AIX]: Use TZ environment
 	variable.

 2023-01-14  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (TZDB_DISABLED): Disable all code for
 	loading tzdb.
 	* testsuite/std/time/tzdb/leap_seconds.cc: Require tzdb
 	effective target.
 	* testsuite/std/time/tzdb_list/1.cc: Likewise.

 2023-01-14  Jonathan Wakely  <jwakely@redhat.com>

 	* acinclude.m4 (GLIBCXX_ZONEINFO_DIR): Replace the
 	--with-libstdcxx-zoneinfo-dir configure option with
 	--with-libstdcxx-zoneinfo with yes/no/static choices as well as
 	a directory.
 	* config.h.in: Regenerate.
 	* configure: Regenerate.
 	* doc/xml/manual/configure.xml: Document configure option.
 	* doc/html/manual/configure.html: Regenerate.
 	* src/c++20/Makefile.am: Generate tzdata.zi.h header.
 	* src/c++20/Makefile.in: Regenerate.
 	* src/c++20/tzdb.cc (__gnu_cxx::zoneinfo_dir_override): Return a
 	null pointer if no directory is configured.
 	(zoneinfo_dir): Replace with ...
 	(zoneinfo_file): New function.
 	(tzdata_stream): New istream class.
 	(remote_version, reload_tzdb): Use tzdata_stream.
 	* testsuite/lib/libstdc++.exp (check_effective_target_tzdb):
 	Check new _GLIBCXX_STATIC_TZDATA macro and ignore presence of
 	tzdata.zi file in default location.
 	* src/c++20/tzdata.zi: New file.

 2023-01-14  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/chrono_io.h (operator<<): Fix syntax errors.
 	* testsuite/std/time/month_day/io.cc: New test.
 	* testsuite/std/time/month_day_last/io.cc: New test.
 	* testsuite/std/time/month_weekday/io.cc: New test.
 	* testsuite/std/time/month_weekday_last/io.cc: New test.
 	* testsuite/std/time/weekday_indexed/io.cc: New test.
 	* testsuite/std/time/weekday_last/io.cc: New test.
 	* testsuite/std/time/year_month/io.cc: New test.
 	* testsuite/std/time/year_month_day_last/io.cc: New test.
 	* testsuite/std/time/year_month_weekday/io.cc: New test.
 	* testsuite/std/time/year_month_weekday_last/io.cc: New test.

 2023-01-14  François Dumont  <fdumont@gcc.gnu.org>

 	* include/std/format [_GLIBCXX_INLINE_VERSION](to_chars): Adapt __asm symbol
 	specifications.
 	* config/abi/pre/gnu-versioned-namespace.ver: Add to_chars/from_chars symbols
 	export.

 2023-01-13  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/std_mutex.h: Include <errno.h>.

 2023-01-13  Arsen Arsenović  <arsen@aarsen.me>

 	* testsuite/20_util/to_chars/version.cc: Mark hosted-only.
 	* testsuite/20_util/uses_allocator/lwg3677.cc: Ditto.
 	* testsuite/20_util/weak_ptr/cons/self_move.cc: Ditto.
 	* testsuite/std/ranges/adaptors/as_rvalue/1.cc: Replace usage of
 	std::make_unique with a freestanding-compatible wrapper around
 	unique_ptr.
 	* testsuite/21_strings/basic_string_view/operations/contains/char.cc:
 	Don't test for presence of __cpp_lib_string_contains on !HOSTED.
 	* testsuite/21_strings/basic_string_view/operations/contains/char/2.cc:
 	Ditto.
 	* testsuite/std/ranges/version_c++23.cc: Don't test for presence
 	of __cpp_lib_ranges in !HOSTED.

 2023-01-13  Arsen Arsenović  <arsen@aarsen.me>

 	* include/Makefile.am: Install bits/char_traits.h,
 	std/string_view
 	* include/Makefile.in: Regenerate.
 	* include/bits/char_traits.h: Gate hosted-only, wchar-only and
 	mbstate-only bits behind appropriate #ifs.
 	* include/std/string_view: Gate <iostream> functionality behind
 	HOSTED.
 	* include/std/version: Enable __cpp_lib_constexpr_string_view
 	and __cpp_lib_starts_ends_with in !HOSTED.
 	* include/std/ranges: Re-enable __is_basic_string_view on
 	freestanding, include <string_view> directly.
 	* include/precompiled/stdc++.h: Include <string_view> when
 	!HOSTED too.
 	* testsuite/20_util/function_objects/searchers.cc: Skip testing
 	boyer_moore searchers on freestanding
 	* testsuite/21_strings/basic_string_view/capacity/1.cc: Guard
 	<string>-related tests behind __STDC_HOSTED__.
 	* testsuite/21_strings/basic_string_view/cons/char/1.cc: Ditto.
 	* testsuite/21_strings/basic_string_view/cons/char/2.cc: Remove
 	unused <stdexcept> include.
 	* testsuite/21_strings/basic_string_view/cons/char/3.cc: Remove
 	unused <vector> include.
 	* testsuite/21_strings/basic_string_view/cons/char/range.cc:
 	Guard <string> related testing behind __STDC_HOSTED__.
 	* testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
 	Guard <stdexcept> related tests behind __STDC_HOSTED__.
 	* testsuite/21_strings/basic_string_view/element_access/char/1.cc:
 	Ditto.
 	* testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
 	Guard <stdexcept> tests behind __STDC_HOSTED__.
 	* testsuite/21_strings/basic_string_view/operations/contains/char/2.cc:
 	Enable test on freestanding, guard <stdexcept> bits behind
 	__STDC_HOSTED__.
 	* testsuite/21_strings/basic_string_view/operations/substr/char.cc:
 	Guard <stdexcept> bits behind __STDC_HOSTED__.
 	* testsuite/21_strings/basic_string_view/operations/substr/wchar_t.cc:
 	Ditto.

 2023-01-13  Dimitrij Mijoski  <dmjpp@hotmail.com>

 	PR libstdc++/86419
 	* src/c++11/codecvt.cc (read_utf8_code_point): Correctly detect
 	errors in incomplete multibyte sequences.
 	(utf16_in): Remove surrogates parameter. Fix conditions for
 	returning partial.
 	(utf16_out): Fix condition for returning partial.
 	(ucs2_in): Do not pass surrogates argument to utf16_in.
 	* testsuite/22_locale/codecvt/codecvt_unicode.cc: New test.
 	* testsuite/22_locale/codecvt/codecvt_unicode.h: New header for
 	tests.
 	* testsuite/22_locale/codecvt/codecvt_unicode_wchar_t.cc: New
 	test.

 2023-01-13  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108331
 	* config/io/c_io_stdio.h (__c_lock): Define as a typedef for
 	__GTHREAD_LEGACY_MUTEX_T if defined.

 2023-01-13  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108327
 	* config/os/gnu-linux/ldbl-extra.ver (GLIBCXX_LDBL_3.4.31):
 	Export __try_use_facet specializations for facets in namespace
 	__gnu_cxx_ldbl128.
 	* config/os/gnu-linux/ldbl-ieee128-extra.ver
 	(GLIBCXX_IEEE128_3.4.31): Likewise for facets in namespace
 	__gnu_cxx_ieee128.
 	* testsuite/util/testsuite_abi.cc: Add to lists of known and
 	latest versions.

 2023-01-13  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/std_mutex.h: Remove <system_error> include.
 	* include/std/condition_variable: Add <bits/error_constants.h>
 	include.
 	* include/std/mutex: Likewise.
 	* include/std/shared_mutex: Likewise.

 2023-01-12  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/77691
 	* include/experimental/memory_resource
 	(_GLIBCXX_MAX_ALIGN_MATCHES_MALLOC): Define.
 	(do_allocate, do_deallocate): Check it.
 	* testsuite/experimental/memory_resource/new_delete_resource.cc:
 	Relax expected behaviour for 64-bit hppa-hp-hpux11.11.

 2023-01-12  Jonathan Wakely  <jwakely@redhat.com>

 	* doc/xml/manual/abi.xml: Add latest library versions.
 	* doc/html/manual/abi.html: Regenerate.

 2023-01-12  François Dumont  <fdumont@gcc.gnu.org>

 	PR libstdc++/107189
 	* include/bits/stl_tree.h (_Rb_tree<>::_M_insert_range_equal): Remove
 	unused _Alloc_node instance.

 2023-01-12  Jonathan Wakely  <jwakely@redhat.com>

 	* include/bits/atomic_wait.h (__detail::__platform_wait_t):
 	Define as unsigned long if always lock-free, and unsigned int
 	otherwise.

 2023-01-10  Jonathan Wakely  <jwakely@redhat.com>

 	* src/c++20/tzdb.cc (tzdb_list::_S_init_tzdb): Use __try and
 	__catch macros for exception handling.

 2023-01-10  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108221
 	* include/bits/stl_algobase.h (__lg): Replace six overloads with
 	a single function template for all integer types.
 	* include/bits/stl_algo.h (__merge_adaptive_resize): Cast
 	arithmetic results back to _Distance.

 2023-01-10  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108221
 	* include/std/span (span::span()): Un-simplify constraint to
 	work for size_t of lesser rank than int.

 2023-01-07  LIU Hao  <lh_mouse@126.com>

 	PR middle-end/108300
 	* src/c++11/system_error.cc: Define `WIN32_LEAN_AND_MEAN` before
 	<windows.h>.
 	* src/c++11/thread.cc: Likewise.
 	* src/c++17/fs_ops.cc: Likewise.
 	* src/filesystem/ops.cc: Likewise.

 2023-01-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108228
 	* src/c++20/tzdb.cc (zoneinfo_dir): Add diagnostic pragma.

 2023-01-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108235
 	* src/c++20/tzdb.cc (time_zone::_Impl::RulesCounter): New class
 	template and partial specialization for synchronizing access to
 	time_zone::_Impl::infos.
 	(time_zone::_M_get_sys_info, reload_tzdb): Adjust uses of
 	rules_counter.

 2023-01-06  Patrick Palka  <ppalka@redhat.com>

 	PR libstdc++/108260
 	* include/bits/utility.h (__cpp_lib_ranges_zip): Define for C++23.
 	* include/std/ranges (__cpp_lib_ranges_zip): Likewise.
 	(__cpp_lib_ranges_chunk): Likewise.
 	(__cpp_lib_ranges_slide): Likewise.
 	(__cpp_lib_ranges_chunk_by): Likewise.
 	(__cpp_lib_ranges_join_with): Likewise.
 	(__cpp_lib_ranges_repeat): Likewise.
 	(__cpp_lib_ranges_stride): Likewise.
 	(__cpp_lib_ranges_cartesian_product): Likewise.
 	(__cpp_lib_ranges_as_rvalue): Likewise.
 	* include/std/version: Ditto.
 	* testsuite/20_util/tuple/p2321r2.cc: Verify value of
 	feature-test macro.
 	* testsuite/std/ranges/adaptors/as_rvalue/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/chunk/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/chunk_by/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/join_with/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/slide/1.cc: Likewise.
 	* testsuite/std/ranges/adaptors/stride/1.cc: Likewise.
 	* testsuite/std/ranges/cartesian_product/1.cc: Likewise.
 	* testsuite/std/ranges/repeat/1.cc: Likewise.
 	* testsuite/std/ranges/zip/1.cc: Likewise.
 	* testsuite/std/ranges/version_c++23.cc: New test.

 2023-01-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108214
 	* include/std/bitset (operator>>): Use alloca in the right
 	scope, not in a constructor.
 	* testsuite/20_util/bitset/io/input.cc: Check case from PR.

 2023-01-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108221
 	* include/std/format (basic_format_arg) [!__cpp_lib_to_chars]:
 	Disable visiting floating-point types.

 2023-01-06  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108288
 	* include/debug/safe_iterator.h (_Safe_iterator::operator++(int))
 	(_Safe_iterator::operator--(int)): Do not hold lock around
 	construction of return value.

 2023-01-05  John David Anglin  <danglin@gcc.gnu.org>

 	* config/cpu/hppa/atomicity.h (_PA_LDCW_INSN): Define.
 	(__exchange_and_add): Use _PA_LDCW_INSN.  Use ordered store for
 	lock release.  Revise loop.
 	(__atomic_add): Likewise.

 2023-01-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108212
 	* python/libstdcxx/v6/printers.py (_utc_timezone): New global
 	variable.
 	(StdChronoTimePointPrinter::to_string): Use it.

 2023-01-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108290
 	* include/std/functional (_Bind_front): Add no_unique_address
 	attribute to data members.
 	* testsuite/20_util/function_objects/bind_front/107784.cc: Check
 	size of call wrappers with empty types for targets and bound
 	arguments.

 2023-01-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108211
 	* src/c++20/tzdb.cc (chrono::current_zone()): Check for zone
 	using only last component of the name.

 2023-01-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108228
 	PR libstdc++/108235
 	* config/abi/pre/gnu.ver: Move zoneinfo_dir_override export to
 	the latest symbol version.
 	* src/c++20/tzdb.cc (USE_ATOMIC_SHARED_PTR): Define to 0 if
 	atomic<_Node*> is not always lock free.
 	(USE_ATOMIC_LIST_HEAD): New macro.
 	[__hpux__] (__gnu_cxx::zoneinfo_dir_override()): Provide
 	definition of weak symbol.
 	(tzdb_list::_Node::_S_head): Rename to _S_head_cache.
 	(tzdb_list::_Node::_S_list_head): New function for accessing
 	list head efficiently.
 	(tzdb_list::_Node::_S_cache_list_head): New function for
 	updating _S_list_head.

 2023-01-05  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108265
 	* include/std/chrono (hh_mm_ss): Do not use chrono::abs if
 	duration rep is unsigned.
 	* testsuite/std/time/hh_mm_ss/1.cc: Check unsigned rep.

 2023-01-04  Iain Sandoe  <iain@sandoe.co.uk>

 	PR libstdc++/108228
 	* config/abi/pre/gnu.ver (GLIBCXX_3.4):
 	Add __gnu_cxx::zoneinfo_dir_override().

 2023-01-04  Jonathan Wakely  <jwakely@redhat.com>

 	PR libstdc++/108258
 	* include/std/array (__array_traits<T, 0>::operator T*()): Add
 	constexpr.
 	* testsuite/23_containers/array/element_access/constexpr_c++17.cc: Check
 	std::array<T, 0>::data().


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