Daily bump.

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

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>

        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().

\f
Copyright (C) 2023 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.