path: root/libstdc++-v3/ChangeLog

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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