Daily bump.

[thirdparty/gcc.git] / libstdc++-v3 / ChangeLog

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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