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

2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>

        * doc/xml/manual/ctype.xml: Move unix.org reference to https.
        * doc/html/manual/facets.html: Regenerate.

2021-04-30  Patrick Palka  <ppalka@redhat.com>

        * include/std/ranges (__detail::__non_propating_cache): Define
        as per P2328.
        (join_view): Remove constraints on the value and reference types
        of the wrapped iterator type as per P2328.
        (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
        (join_view::_Iterator::operator++): Likewise.
        (join_view::_M_inner): Use __non_propating_cache as per P2328.
        Remove now-redundant use of __maybe_present_t.
        * testsuite/std/ranges/adaptors/join.cc: Include <array>.
        (test10): New test.

2021-04-30  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/basic_string.h (__cpp_lib_constexpr_string):
        Only define for C++17 and later.
        * include/std/version (__cpp_lib_semaphore): Fix condition
        to match the one in <semaphore>.

2021-04-30  Jonathan Wakely  <jwakely@redhat.com>

        * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
        * config.h.in: Regenerate.
        * configure: Regenerate.
        * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
        * include/bits/postypes.h: Remove include of <stdint.h> and
        definition/undefinition of the __STDC_LIMIT_MACROS and
        __STDC_CONSTANT_MACROS macros.
        (streamoff): Use __INT64_TYPE__ if defined.

2021-04-30  Patrick Palka  <ppalka@redhat.com>

        * include/std/ranges (split_view::_InnerIter::operator++):
        Depend on _Base instead of _Vp directly, as per LWG 3532.

2021-04-30  Patrick Palka  <ppalka@redhat.com>

        * include/bits/ranges_util.h (subrange::subrange): Avoid
        list-initialization in delegating constructor.
        * include/std/ranges (single_view): Replace implicit guide
        with explicit deduction guide that decays its argument.
        (_Single::operator()): Avoid CTAD when constructing the
        single_view object.
        (_Iota::operator()): Avoid list-initialization.
        (__detail::__can_filter_view, _Filter::operator()): Likewise.
        (__detail::__can_transform_view, _Transform::operator()): Likewise.
        (take_view::begin): Likewise.
        (__detail::__can_take_view, _Take::operator()): Likewise.
        (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
        (__detail::__can_drop_view, _Drop::operator()): Likewise.
        (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
        (split_view::split_view): Use views::single when initializing
        _M_pattern.
        (__detail::__can_split_view, _Split::operator()): Avoid
        list-initialization.
        (_Counted::operator()): Likewise.
        * testsuite/std/ranges/p2367.cc: New test.

2021-04-30  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/60497
        * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
        std::addressof.
        * include/bits/basic_string.tcc (basic_string::swap)
        (basic_string::assign): Likewise.
        * include/bits/deque.tcc (deque::operator=(const deque&)):
        Likewise.
        * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
        Likewise.
        * include/bits/vector.tcc (vector::operator=(const vector&)):
        Likewise.

2021-04-30  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
        per LWG 1203.
        * include/std/ostream (operator<<(Ostream&&, const x&)):
        Likewise.
        * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
        Adjust dg-error pattern.
        * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
        Likewise.
        * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
        is_extractable trait to replace std::__is_extractable. Make it
        work with rvalue streams as well as lvalues, to replace f() and
        g() helper functions.
        * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
        Likewise.
        * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
        Define is_insertable trait to replace std::__is_insertable. Make
        it work with rvalue streams as well as lvalues, to replace f()
        and g() helper functions.
        * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
        errors from new constraints.
        * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
        which are no longer expected to compile.
        * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
        Verify LWG 1203 changes.

2021-04-30  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100285
        * include/experimental/socket (__basic_socket_impl::set_option)
        (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
        Just set error code.
        * testsuite/experimental/net/socket/socket_base.cc: CHeck
        for <sys/socket.h> not <socket.h>.

2021-04-30  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100180
        PR libstdc++/100286
        PR libstdc++/100351
        * testsuite/experimental/net/internet/address/v4/comparisons.cc:
        Use new effective-target keyword.
        * testsuite/experimental/net/internet/address/v4/cons.cc:
        Likewise.
        * testsuite/experimental/net/internet/address/v4/creation.cc:
        Likewise.
        * testsuite/experimental/net/internet/address/v4/members.cc:
        Likewise.
        * testsuite/experimental/net/internet/address/v6/members.cc:
        Likewise.
        * testsuite/experimental/net/internet/resolver/base.cc:
        Likewise.
        * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
        Likewise.
        * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
        Likewise.
        * testsuite/experimental/net/internet/socket/opt.cc:
        Likewise.
        * testsuite/experimental/net/internet/tcp.cc:
        Likewise.
        * testsuite/experimental/net/internet/udp.cc:
        Likewise.
        * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
        New proc to check net_ts_ip et.

2021-04-28  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/97930
        * testsuite/20_util/pair/requirements/structural.cc: New test.

2021-04-28  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
        new definitions for constructors and assignment operators using
        concepts for constraints.
        * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
        later.
        * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
        expected error messages to also match C++20 errors.

2021-04-28  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99957
        * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
        Combine and replace with ...
        (_PCC::_DeprConsPair): New SFINAE helper function.
        (pair): Merge preprocessor blocks so that all C++03 members
        are defined together at the end.
        (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
        Replace _T1 and _T2 parameters with __null_ptr_constant and
        adjust constraints.
        * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
        * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
        * testsuite/20_util/pair/cons/99957.cc: New test.

2021-04-28  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
        * include/std/version (__cpp_lib_constexpr_string): Define.
        * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
        Check for __cpp_lib_constexpr_string.
        * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
        Likewise.
        * testsuite/21_strings/char_traits/requirements/version.cc: New test.

2021-04-28  Jonathan Wakely  <jwakely@redhat.com>

        * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
        dealing with errors. Use '@' to prevent shell command being
        echoed.
        * doc/Makefile.in: Regenerate.

2021-04-28  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100298
        * include/bits/std_thread.h (thread::hardware_concurrency): Add
        missing noexcept to inline definition for non-gthreads targets.

2021-04-28  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/100187
        PR libstdc++/100237
        PR libstdc++/100249
        PR libstdc++/100287
        * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
        the __value_comp lambda an explicit bool return type.
        (__is_permutation_fn::operator()): Give the __proj_scan local
        variable auto&& return type.  Give the __comp_scan lambda an
        explicit bool return type.
        (__remove_fn::operator()): Give the __pred lambda an explicit
        bool return type.
        (__partition_fn::operator()): Don't std::move __first twice
        when returning an empty subrange.
        (__min_fn::operator()): Don't std::move __comp.
        (__max_fn::operator()): Likewise.
        (__minmax_fn::operator()): Likewise.

2021-04-27  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/100290
        * include/std/ranges (join_view::_Iterator::operator++): Correct
        the return type of the lambda to avoid returning a copy of
        _M_parent->_M_inner.
        * testsuite/std/ranges/adaptors/join.cc (test10): New test.

2021-04-27  Jakub Jelinek  <jakub@redhat.com>

        Revert:
        2021-04-22  Jakub Jelinek  <jakub@redhat.com>

        PR target/100182
        * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
        ia32.
        * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
        ia32.

2021-04-27  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/internet (address_v6::bytes_type): Adjust
        formatting.
        (basic_endpoint): Define _M_is_v6() to put all checks for
        AF_INET6 in one place.
        (basic_endpoint::resize): Simplify.
        (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
        (operator!=(const tcp&, const tcp&)): Likewise.
        (operator==(const udp&, const udp&)): Likewise.
        (operator!=(const udp&, const udp&)): Likewise.
        * testsuite/experimental/net/internet/tcp.cc: New test.
        * testsuite/experimental/net/internet/udp.cc: New test.

2021-04-27  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100286
        * include/experimental/internet (resolver_errc, resolver_category())
        (make_error_code, make_error_condition): Define unconditionally,
        only make enumerators and use of gai_strerror depend on the
        availability of <netdb.h>.
        (address_v4::to_string): Use correct constant for string length.
        (address_v4::to_string, address_v6::to_string): Define
        unconditionally, throw if unsupported.
        (make_address_v4, make_address_v6): Define unconditionally.
        Return an error if unsupported.
        (tcp, udp, v6_only, unicast::hops, multicast::*): Define
        conditionally,
        * testsuite/experimental/net/internet/socket/opt.cc: Check for
        <netinet/in.h> and <netinet/tcp.h> before using types from
        namespace net::ip.

2021-04-27  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100285
        * include/experimental/internet (resolver_base::flags):
        Define overloaded operators as hidden friends.
        * include/experimental/socket (socket_base::message_flags):
        Likewise.

2021-04-26  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/internet (tcp::no_delay, v6_only)
        (unicast::hops, multicast::hops, multicast::enable_loopback):
        Change access of base class and static data members. Add
        using-declaration for __socket_crtp::operator=(_Tp).
        (multicast::__mcastopt): New type.
        (multicast::join_group, multicast::leave_group): Derive from
        __mcastopt for common implementation.
        * include/experimental/socket: Add comment.
        * testsuite/experimental/net/internet/socket/opt.cc: New test.
        * testsuite/experimental/net/socket/socket_base.cc: Check for
        protected constructor/destructor of socket_base. Check for
        explicit constructors of socket option classes.

2021-04-26  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/bits/net.h (__socket_base): Add
        bool template parameter to allow BooleanSocketOption and
        IntegerSocketOption to have different __socket_base<int>
        base classes.
        (__socket_base<bool>): Adjust base class.
        (__socket_base<int>): Add partial specialization.
        (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
        * include/experimental/socket (socket_base::broadcast)
        (socket_base::debug, socket_base::do_not_route)
        (socket_base::keep_alive, socket_base::linger)
        (socket_base::out_of_band_inline)
        (socket_base::receive_buffer_size)
        (socket_base::receive_low_watermark)
        (socket_base::reuse_address, socket_base::send_buffer_size)
        (socket_base::send_low_watermark): Add using-declaration for
        __socket_crtp::operator=(_Tp).
        * testsuite/experimental/net/socket/socket_base.cc: Check
        properties of socket option types.

2021-04-26  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/internet (resolver_base::flags): Remove
        enumerators. Initialize constants directly with desired values.
        Make all operators constexpr and noexcept.
        * testsuite/experimental/net/internet/resolver/base.cc: Use
        __gnu_test::test_bitmask_values for bitmask type. Check
        construction and destruction is protected.

2021-04-26  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/semaphore_base.h: Include <exception> and <errno.h>.

2021-04-26  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100259
        * include/experimental/internet (net::ip::make_error_code)
        (net::ip::make_error_condition, net::ip::make_network_v4)
        (net::ip::operator==(const udp&, const udp&)): Add 'inline'.

2021-04-24  David Edelsohn  <dje.gcc@gmail.com>

        * testsuite/lib/dg-options.exp (atomic_link_flags): New.
        (add_options_for_libatomic): Use atomic_link_flags.

2021-04-23  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100180
        * include/experimental/io_context (io_context): Define
        dummy_pollfd type so that most member functions still compile
        without <poll.h> and struct pollfd.

2021-04-23  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/io_context (io_context::async_wait): Add
        comment.
        * include/experimental/socket (basic_socket::async_connect):
        Cast wait_type constant to int.
        (basic_datagram_socket::async_receive): Likewise.
        (basic_datagram_socket::async_receive_from): Likewise.
        (basic_datagram_socket::async_send): Likewise.
        (basic_datagram_socket::async_send_to): Likewise.
        (basic_stream_socket::async_receive): Likewise.
        (basic_stream_socket::async_send): Likewise. Use io_context
        parameter directly, instead of via an executor.
        (basic_socket_acceptor::async_accept): Likewise.

2021-04-23  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/socket (socket_base::shutdown_type):
        (socket_base::wait_type, socket_base::message_flags):
        Remove enumerators. Initialize constants directly with desired
        values.
        (socket_base::message_flags): Make all operators constexpr and
        noexcept.
        * testsuite/util/testsuite_common_types.h (test_bitmask_values):
        New test utility.
        * testsuite/experimental/net/socket/socket_base.cc: New test.

2021-04-22  David Edelsohn  <dje.gcc@gmail.com>

        * config/os/aix/atomicity.h: Delete.

2021-04-22  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
        Handle system_clock as well as steady_clock.
        * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
        * testsuite/30_threads/semaphore/try_acquire_until.cc:
        Re-enable.

2021-04-22  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
        options for libatomic.

2021-04-22  Jonathan Wakely  <jwakely@redhat.com>

        * config/os/gnu-linux/os_defines.h: Fix type in comment.

2021-04-22  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99006
        * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
        is not an array type.
        * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
        * testsuite/20_util/shared_ptr/creation/99006.cc: New test.

2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>

        * include/bits/atomic_wait.h: Always notify waiters in the
        case of 'bare' address notification.

2021-04-22  Jakub Jelinek  <jakub@redhat.com>

        PR target/100182
        * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
        ia32.
        * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
        ia32.

2021-04-22  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100179
        * include/bits/semaphore_base.h: Remove #error.
        * include/std/semaphore: Do not define anything unless one of
        the implementations is available.

2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>

        * include/bits/semaphore_base.h: Always reload __old in
        __atomic_semaphore::_S_do_try_acquire().
        * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
        re-enable testcase.

2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
            Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99453
        * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
        * python/Makefile.in: Regenerate.

2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>

        * include/bits/semaphore_base.h: Add missing _M_try_acquire()
        member to __platform_wait.

2021-04-21  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/latch: Replace tab characters in license text.
        * include/std/semaphore: Likewise.

2021-04-21  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/100164
        * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
        rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
        * configure: Regenerated.
        * config.h.in: Regenerated.

2021-04-20  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
        test for targets not using futexes for semaphores.
        * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
        * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
        Disable for all targets.

2021-04-20  Thomas Rodgers  <trodgers@redhat.com>

        * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
        * include/Makefile.in: Regenerate.
        * include/bits/this_thread_sleep.h: New file.
        * include/bits/atomic_base.h: Adjust all calls
        to __atomic_wait/__atomic_notify for new call signatures.
        * include/bits/atomic_timed_wait.h: Extensive rewrite.
        * include/bits/atomic_wait.h: Likewise.
        * include/bits/semaphore_base.h: Adjust all calls
        to __atomic_wait/__atomic_notify for new call signatures.
        * include/std/atomic: Likewise.
        * include/std/barrier: Likewise.
        * include/std/latch: Likewise.
        * include/std/semaphore: Likewise.
        * include/std/thread (this_thread::sleep_for)
        (this_thread::sleep_until): Move to new header.
        * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
        test.
        * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
        * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
        * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
        * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
        * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
        * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.

2021-04-20  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/95983
        * include/bits/stl_iterator.h (__detail::__move_iter_cat):
        Define.
        (move_iterator): Derive from the above in C++20 in order to
        conditionally define iterator_category as per P2259.
        (move_iterator::__base_cat): No longer used, so remove.
        (move_iterator::iterator_category): Remove in C++20.
        (__detail::__common_iter_use_postfix_proxy): Define.
        (common_iterator::_Proxy): Rename to ...
        (common_iterator:__arrow_proxy): ... this.
        (common_iterator::__postfix_proxy): Define as per P2259.
        (common_iterator::operator->): Adjust.
        (common_iterator::operator++): Adjust as per P2259.
        (iterator_traits<common_iterator>::_S_iter_cat): Define.
        (iterator_traits<common_iterator>::iterator_category): Change as
        per P2259.
        (__detail::__counted_iter_value_type): Define.
        (__detail::__counted_iter_concept): Define.
        (__detail::__counted_iter_cat): Define.
        (counted_iterator): Derive from the above three classes in order
        to conditionally define value_type, iterator_concept and
        iterator category respectively as per P2259.
        (counted_iterator::operator->): Define as per P2259.
        (incrementable_traits<counted_iterator>): Remove as per P2259.
        (iterator_traits<counted_iterator>): Adjust as per P2259.
        * include/std/ranges (__detail::__iota_view_iter_cat): Define.
        (iota_view::_Iterator): Derive from the above in order to
        conditionally define iterator_category as per P2259.
        (iota_view::_S_iter_cat): Rename to ...
        (iota_view::_S_iter_concept): ... this.
        (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
        (iota_view::iterator_category): Remove.
        (__detail::__filter_view_iter_cat): Define.
        (filter_view::_Iterator): Derive from the above in order to
        conditionally define iterator_category as per P2259.
        (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
        (filter_view::_Iterator::iterator_category): Remove.
        (transform_view::_Base): Define.
        (transform_view::__iter_cat): Define.
        (transform_view::_Iterator): Derive from the above in order to
        conditionally define iterator_category as per P2259.
        (transform_view::_Iterator::_Base): Just alias
        transform_view::_Base.
        (transform_view::_Iterator::_S_iter_cat): Move to struct
        transform_view::__iter_cat.
        (transform_view::_Iterator::iterator_category): Remove.
        (transform_view::_Sentinel::_Base): Just alias
        transform_view::_Base.
        (join_view::_Base): Define.
        (join_view::_Outer_iter): Define.
        (join_view::_Inner_iter): Define.
        (join_view::_S_ref_is_glvalue): Define.
        (join_view::__iter_cat): Define.
        (join_view::_Iterator): Derive from it in order to conditionally
        define iterator_category as per P2259.
        (join_view::_Iterator::_Base): Just alias join_view::_Base.
        (join_view::_Iterator::_S_ref_is_glvalue): Just alias
        join_view::_S_ref_is_glvalue.
        (join_view::_Iterator::_S_iter_cat): Move to struct
        transform_view::__iter_cat.
        (join_view::_Iterator::_Outer_iter): Just alias
        join_view::_Outer_iter.
        (join_view::_Iterator::_Inner_iter): Just alias
        join_view::_Inner_iter.
        (join_view::_Iterator::iterator_category): Remove.
        (join_view::_Sentinel::_Base): Just alias join_view::_Base.
        (__detail::__split_view_outer_iter_cat): Define.
        (__detail::__split_view_inner_iter_cat): Define.
        (split_view::_Base): Define.
        (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
        in order to conditionally define iterator_category as per P2259.
        (split_view::_Outer_iter::iterator_category): Remove.
        (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
        in order to conditionally define iterator_category as per P2259.
        (split_view::_Inner_iter::_S_iter_cat): Move to
        __split_view_inner_iter_cat.
        (split_view::_Inner_iter::iterator_category): Remove.
        (elements_view::_Base): Define.
        (elements_view::__iter_cat): Define.
        (elements_view::_Iterator): Derive from the above in order to
        conditionall define iterator_category as per P2259.
        (elements_view::_Iterator::_Base): Just alias
        elements_view::_Base.
        (elements_view::_Iterator::_S_iter_concept)
        (elements_view::_Iterator::iterator_concept): Define as per
        P2259.
        (elements_view::_Iterator::iterator_category): Remove.
        (elements_view::_Sentinel::_Base): Just alias
        elements_view::_Base.
        * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
        Adjust constraints on iterator_traits<counted_iterator>.
        * testsuite/std/ranges/p2259.cc: New test.

2021-04-20  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100146
        * include/std/charconv (__cpp_lib_to_chars): Define
        conditionally.
        * include/std/version (__cpp_lib_to_chars): Likewise..
        * testsuite/20_util/from_chars/4.cc: Only check feature test
        macro, not _GLIBCXX_HAVE_USELOCALE.
        * testsuite/20_util/from_chars/5.cc: Likewise.
        * testsuite/20_util/from_chars/6.cc: Likewise.
        * testsuite/20_util/to_chars/long_double.cc: Likewise.

2021-04-20  Jakub Jelinek  <jakub@redhat.com>

        * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
        versions with _IEEE128_ substring are found, set ieee_version_found
        to true.  Ignore missing symbols with _IEEE128_ in version name if
        !ieee_version_found.  Use i->first as version_name instead of
        i->second.version_name if the latter is empty.
        * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.

2021-04-19  H.J. Lu  <hjl.tools@gmail.com>

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

2021-04-17  Jakub Jelinek  <jakub@redhat.com>

        * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.

2021-04-17  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/i386-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.

2021-04-15  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
        add libatomic options for 32-bit sparc*-*-linux-gnu.

2021-04-15  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/96657
        * libsupc++/Makefile.am: Add atomicity.cc here.
        * src/c++98/Makefile.am: Remove it from here.
        * libsupc++/Makefile.in: Regenerate.
        * src/c++98/Makefile.in: Regenerate.
        * testsuite/18_support/exception_ptr/96657.cc: New test.

2021-04-13  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100060
        * include/std/bit: Only include <ext/numeric_traits.h> for
        hosted build, use <limits> otherwise.

2021-04-13  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/backwards_compatibility.xml: Remove porting
        notes for libg++ and libstdc++-v2, and bibliography.
        * doc/html/*: Regenerated.

2021-04-12  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/100044
        * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
        Remove helper concept.
        (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
        deduction guides, as per LWG 3404.
        * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
        template argument deduction fails.

2021-04-12  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
        Adjust expected error for C++20 mode.
        * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
        Likewise.

2021-04-12  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99995
        * testsuite/17_intro/headers/c++1998/49745.cc: Include all
        standard headers and XFAIL for effective-target c++20.

2021-04-09  François Dumont  <fdumont@gcc.gnu.org>

        PR libstdc++/99402
        * include/debug/helper_functions.h (__can_advance(_InputIterator,
        const std::pair<_Diff, _Distance_precision>&, int)): New.
        (__can_advance(const _Safe_iterator<>&,
        const std::pair<_Diff, _Distance_precision>&, int)): New.
        * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
        use latter.
        (__glibcxx_check_can_increment_range): Adapt to use latter.
        (__glibcxx_check_can_decrement_range): Likewise.
        * include/debug/safe_iterator.h
        (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
        int)): New.
        (__can_advance(const _Safe_iterator<>&,
        const std::pair<_Diff, _Distance_precision>&, int)): New.
        * include/debug/safe_iterator.tcc
        (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
        int)): New.
        (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
        std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
        __dp_sign_max_size.
        (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
        (__copy_move_backward_a): Likewise.
        (__equal_aux): Likewise.
        * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
        const std::pair<_Diff, _Distance_precision>&, int)): New.
        (__can_advance(const std::move_iterator<>&,
        const std::pair<_Diff, _Distance_precision>&, int)): New.
        * testsuite/25_algorithms/copy/debug/99402.cc: New test.

2021-04-09  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99985
        * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
        to be a valid constexpr function in C++11.
        * testsuite/23_containers/unordered_set/cons/99985.cc: New test.

2021-04-09  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/fs_fwd.h: Fix doxygen group command.
        * include/bits/streambuf_iterator.h: Likewise.
        * include/bits/uses_allocator_args.h: Likewise.
        * include/std/memory: Likewise.
        * include/tr1/complex: Likewise.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/basic_string.h: Tweak doxygen comment.

2021-04-08  Patrick Palka  <ppalka@redhat.com>

        * include/std/ranges (__detail::find): Define.
        (split_view::_OuterIter::operator++): Apply proposed resolution
        of LWG 3505.
        * testsuite/std/ranges/adaptors/split.cc (test10): New test.

2021-04-08  Patrick Palka  <ppalka@redhat.com>

        * include/std/ranges (__detail::find_if): Simplify.
        (__detail::find_if_not): Likewise.
        (__detail::min): Remove.
        (__detail::mismatch): Simplify.
        (take_view::size): Use std::min instead of __detail::min.

2021-04-08  Patrick Palka  <ppalka@redhat.com>

        * include/std/ranges (__detail::__returnable_element): New
        concept.
        (elements_view): Use this concept in its constraints.  Add
        missing private access specifier.
        (elements_view::_S_get_element): Define as per LWG 3502.
        (elements_view::operator*, elements_view::operator[]): Use
        _S_get_element.
        (elements_view::operator++): Remove unnecessary constraint
        as per LWG 3492.
        * testsuite/std/ranges/adaptors/elements.cc (test05): New test.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
        out-of-memory error in log file.
        * doc/Makefile.in: Regenerate.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * configure: Regenerate.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/random.h: Fix doxygen group commands.
        * include/bits/regex_constants.h: Likewise.
        * include/tr1/random.h: Likewise.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
        New function to determine noexcept-specifier for move
        constructors.
        (_Hashtable): Use _S_nothrow_move() on move constructors.
        * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
        Correct static assertion message.
        * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
        Likewise.
        * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
        Likewise.
        * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
        Likewise.

2021-04-08  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/98384
        * testsuite/20_util/to_chars/long_double.cc: Don't run the test
        on targets without a large long double.  XFAIL the execution on
        targets with a non-conforming printf.

2021-04-08  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/99433
        * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
        (__adaptor::__adaptor_invocable): New concept.
        (__adaptor::__adaptor_partial_app_viable): New concept.
        (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
        non-template base class.
        (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
        class template.
        (__adaptor::_Partial): New class template that represents
        partial application of a range adaptor non-closure.
        (__adaptor::__pipe_invocable): New concept.
        (__adaptor::_Pipe): New class template.
        (__detail::__can_ref_view): New concept.
        (__detail::__can_subrange): New concept.
        (all): Replace the lambda here with ...
        (_All): ... this functor.  Add appropriate constraints.
        (__detail::__can_filter_view): New concept.
        (filter, _Filter): As in all/_All.
        (__detail::__can_transform): New concept.
        (transform, _Transform): As in all/_All.
        (__detail::__can_take_view): New concept.
        (take, _Take): As in all/_All.
        (__detail::__can_take_while_view): New concept.
        (take_while, _TakeWhile): As in all/_All.
        (__detail::__can_drop_view): New concept.
        (drop, _Drop): As in all/_All.
        (__detail::__can_drop_while_view): New concept.
        (drop_while, _DropWhile): As in all/_All.
        (__detail::__can_join_view): New concept.
        (join, _Join): As in all/_All.
        (__detail::__can_split_view): New concept.
        (split, _Split): As in all/_All.  Rename template parameter
        _Fp to _Pattern.
        (__detail::__already_common): New concept.
        (__detail::__can_common_view): New concept.
        (common, _Common): As in all/_All.
        (__detail::__can_reverse_view): New concept.
        (reverse, _Reverse): As in all/_All.
        (__detail::__can_elements_view): New concept.
        (elements, _Elements): As in all/_All.
        (keys, values): Adjust.
        * testsuite/std/ranges/adaptors/99433.cc: New test.
        * testsuite/std/ranges/adaptors/all.cc: No longer expect that
        adding empty range adaptor closure objects to a pipeline doesn't
        increase the size of the pipeline.
        (test05): New test.
        * testsuite/std/ranges/adaptors/common.cc (test03): New test.
        * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
        * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
        * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
        * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
        * testsuite/std/ranges/adaptors/join.cc (test09): New test.
        * testsuite/std/ranges/adaptors/p2281.cc: New test.
        * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
        * testsuite/std/ranges/adaptors/split.cc (test01, test04):
        Adjust.
        (test09): New test.
        * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
        expected error message.
        (test02): Likewise.  Extend test.
        * testsuite/std/ranges/adaptors/take.cc (test06): New test.
        * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
        * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
        New test.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/string_view: Adjust Doxygen @file comment.

2021-04-08  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/type_traits (is_scoped_enum<T>): Constrain partial
        specialization to not match incomplete enum types. Use a
        requires-expression instead of instantiating is_convertible.
        (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
        * testsuite/20_util/is_scoped_enum/value.cc: Check with
        incomplete types and opaque-enum-declarations.

2021-04-07  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99805
        * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
        non-const member on _M_pathname, to avoid copy-on-write.
        * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
        Check construction from strings that might be shared.

2021-04-06  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/move.h (forward, move, move_if_noexcept)
        (addressof): Add _GLIBCXX_NODISCARD.
        * include/bits/ranges_cmp.h (identity::operator()): Add
        nodiscard attribute.
        * include/c_global/cstddef (to_integer): Likewise.
        * include/std/bit (bit_cast): Likewise.
        * include/std/utility (as_const, to_underlying): Likewise.

2021-04-06  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/move.h (forward): Change static_assert message
        to be unambiguous about what must be true.
        * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
        * testsuite/20_util/forward/f_neg.cc: Likewise.

2021-04-06  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/alloc_traits.h: Use markdown for code font.
        * include/bits/basic_string.h: Fix @param names.
        * include/bits/max_size_type.h: Remove period after @file.
        * include/bits/regex.h: Fix duplicate @retval names, and rename.
        * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
        group open to match existing group close.
        * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
        open.

2021-04-06  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/atomic_base.h: Fix doxygen group close.
        * include/bits/basic_ios.h: Likewise.
        * include/bits/forward_list.h: Likewise.
        * include/bits/fs_dir.h: Likewise.
        * include/bits/fs_ops.h: Likewise.
        * include/bits/fs_path.h: Likewise.
        * include/bits/functional_hash.h: Likewise.
        * include/bits/gslice.h: Likewise.
        * include/bits/gslice_array.h: Likewise.
        * include/bits/hashtable_policy.h: Likewise.
        * include/bits/indirect_array.h: Likewise.
        * include/bits/locale_classes.h: Likewise.
        * include/bits/locale_facets.h: Likewise.
        * include/bits/locale_facets_nonio.h: Likewise.
        * include/bits/mask_array.h: Likewise.
        * include/bits/refwrap.h: Likewise.
        * include/bits/regex.h: Likewise.
        * include/bits/regex_automaton.h: Likewise.
        * include/bits/regex_compiler.h: Likewise.
        * include/bits/regex_constants.h: Likewise.
        * include/bits/regex_error.h: Likewise.
        * include/bits/regex_executor.h: Likewise.
        * include/bits/regex_scanner.h: Likewise.
        * include/bits/shared_ptr.h: Likewise.
        * include/bits/shared_ptr_atomic.h: Likewise.
        * include/bits/shared_ptr_base.h: Likewise.
        * include/bits/slice_array.h: Likewise.
        * include/bits/specfun.h: Likewise.
        * include/bits/std_function.h: Likewise.
        * include/bits/std_mutex.h: Likewise.
        * include/bits/stl_deque.h: Likewise.
        * include/bits/stl_iterator.h: Likewise.
        * include/bits/stl_iterator_base_types.h: Likewise.
        * include/bits/stl_map.h: Likewise.
        * include/bits/stl_multimap.h: Likewise.
        * include/bits/stl_multiset.h: Likewise.
        * include/bits/stl_numeric.h: Likewise.
        * include/bits/stl_pair.h: Likewise.
        * include/bits/stl_set.h: Likewise.
        * include/bits/stl_uninitialized.h: Likewise.
        * include/bits/stream_iterator.h: Likewise.
        * include/bits/streambuf_iterator.h: Likewise.
        * include/bits/unique_ptr.h: Likewise.
        * include/bits/unordered_map.h: Likewise.
        * include/bits/unordered_set.h: Likewise.
        * include/decimal/decimal: Likewise.
        * include/experimental/any: Likewise.
        * include/experimental/array: Likewise.
        * include/experimental/bits/fs_dir.h: Likewise.
        * include/experimental/bits/fs_fwd.h: Likewise.
        * include/experimental/bits/fs_ops.h: Likewise.
        * include/experimental/bits/fs_path.h: Likewise.
        * include/experimental/buffer: Likewise.
        * include/experimental/internet: Likewise.
        * include/experimental/optional: Likewise.
        * include/experimental/propagate_const: Likewise.
        * include/experimental/socket: Likewise.
        * include/ext/pb_ds/assoc_container.hpp: Likewise.
        * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
        Likewise.
        * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
        * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
        * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
        * include/ext/pb_ds/exception.hpp: Likewise.
        * include/ext/pb_ds/priority_queue.hpp: Likewise.
        * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
        * include/ext/random: Likewise.
        * include/std/any: Likewise.
        * include/std/atomic: Likewise.
        * include/std/bitset: Likewise.
        * include/std/chrono: Likewise.
        * include/std/complex: Likewise.
        * include/std/condition_variable: Likewise.
        * include/std/fstream: Likewise.
        * include/std/future: Likewise.
        * include/std/iostream: Likewise.
        * include/std/istream: Likewise.
        * include/std/mutex: Likewise.
        * include/std/numeric: Likewise.
        * include/std/ostream: Likewise.
        * include/std/ratio: Likewise.
        * include/std/shared_mutex: Likewise.
        * include/std/stdexcept: Likewise.
        * include/std/streambuf: Likewise.
        * include/std/system_error: Likewise.
        * include/std/thread: Likewise.
        * include/std/valarray: Likewise.
        * include/std/variant: Likewise.
        * include/tr1/cmath: Likewise.
        * include/tr1/regex: Likewise.
        * include/tr2/dynamic_bitset: Likewise.
        * libsupc++/atomic_lockfree_defines.h: Likewise.
        * libsupc++/exception: Likewise.
        * libsupc++/exception.h: Likewise.
        * libsupc++/exception_ptr.h: Likewise.
        * libsupc++/nested_exception.h: Likewise.

2021-03-31  Alexandre Oliva  <oliva@adacore.com>

        * testsuite/30_threads/future/members/poll.cc: Use faster
        after-ready call in the calibration loop.

2021-03-29  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
        * doc/html/manual/status.html: Regenerate.

2021-03-28  François Dumont  <fdumont@gcc.gnu.org>

        * include/debug/forward_list
        (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
        * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
        call to safe container allocator aware move constructor.
        * include/debug/vector (vector(vector&&, const allocator_type&)):
        Fix noexcept qualification.
        * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
        Add allocator-extended move constructor noexceot qualification check.
        * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.

2021-03-26  Jonathan Wakely  <jwakely@redhat.com>

        * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
        fallback is needed.
        [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
        New helper functions and callback.
        (random_device::_M_init): Add 'prng' and 'all' enumerators.
        Replace switch with fallthrough with a series of 'if' statements.
        [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
        checks fail.
        (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
        token.
        (random_device::_M_getval): Check for callback unconditionally
        and always pass _M_file pointer.
        * testsuite/26_numerics/random/random_device/85494.cc: Remove
        effective-target check. Use new random_device_available helper.
        * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
        * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
        Remove effective-target check.
        * testsuite/26_numerics/random/random_device/cons/default.cc:
        Likewise.
        * testsuite/26_numerics/random/random_device/cons/token.cc: Use
        new random_device_available helper. Test "prng" token.
        * testsuite/util/testsuite_random.h (random_device_available):
        New helper function.

2021-03-25  François Dumont  <fdumont@gcc.gnu.org>

        * include/debug/string
        (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
        (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
        (basic_string<>::erase): Adapt to take __const_iterator.
        (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
        (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
        remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
        [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
        (__gnu_debug::u16string, __gnu_debug::u32string): New.
        (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
        (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
        * testsuite/util/exception/safety.h
        (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
        (insert_base<__gnu_debug::basic_string<>>): Likewise.
        * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
        New partial specialization.
        * testsuite/21_strings/basic_string/hash/debug.cc: New test.
        * testsuite/21_strings/basic_string/requirements/citerators.cc:
        Add test on __gnu_debug::string.
        * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
        * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
        * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
        Likewise.
        * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.

2021-03-25  Jakub Jelinek  <jakub@redhat.com>

        PR c++/99672
        * testsuite/18_support/source_location/consteval.cc (main): Adjust
        expected column numbers.
        * testsuite/18_support/source_location/1.cc (main): Likewise.

2021-03-25  Jonathan Wakely  <jwakely@redhat.com>

        * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.

2021-03-25  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/util/exception/safety.h (setup_base::generate):
        Support seeding random engine.
        (erase_point, erase_range): Adjust range of random numbers to
        ensure dereferenceable iterators are used where required.
        (generation_prohibited::run): Do not try to erase from empty
        containers.
        * testsuite/util/testsuite_containergen.h (test_containers):
        Support seeding random engine.

2021-03-23  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
        line with a check that uses the const being/end overloads.

2021-03-23  Moritz Sichert  <sichert@in.tum.de>

        * include/std/ranges (reverse_view::begin, reverse_view::end):
        Qualify make_reverse_iterator calls to avoid ADL.
        * testsuite/std/ranges/adaptors/reverse.cc: Test that
        views::reverse works when make_reverse_iterator is defined
        in an associated namespace.

2021-03-23  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
        Do not define when compiling with Clang.

2021-03-22  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/string_view (basic_string_view(Range&&)): Define new
        constructor and deduction guide.
        * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
        * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.

2021-03-22  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
        Add missing 'noexcept' as per LWG 2280.
        (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
        (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
        * testsuite/24_iterators/range_access/range_access.cc: Check for
        expected noexcept specifiers. Check result types of generic
        std::begin and std::end overloads.
        * testsuite/24_iterators/range_access/range_access_cpp14.cc:
        Check for expected noexcept specifiers.
        * testsuite/24_iterators/range_access/range_access_cpp17.cc:
        Likewise.

2021-03-19  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/type_traits (is_scoped_enum): Define.
        * include/std/version (__cpp_lib_is_scoped_enum): Define.
        * testsuite/20_util/is_scoped_enum/value.cc: New test.
        * testsuite/20_util/is_scoped_enum/version.cc: New test.

2021-03-16  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99341
        * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
        std::once_flag symbols.
        * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
        * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
        * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
        Likewise.
        * config/abi/pre/gnu.ver: Likewise.
        * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
        (struct __once_flag_compat): Remove.
        (_ZNSt9once_flag11_M_activateEv): Remove.
        (_ZNSt9once_flag9_M_finishEb): Remove.

2021-03-16  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99341
        * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
        Revert to pthread_once_t implementation.
        [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
        * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
        (struct __once_flag_compat): New type matching the reverted
        implementation of once_flag using futexes.
        (once_flag::_M_activate): Remove, replace with ...
        (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
        (once_flag::_M_finish): Remove, replace with ...
        (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
        * testsuite/30_threads/call_once/66146.cc: Removed.

2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

        * testsuite/17_intro/names.cc: Exclude j from the list
        of test symbols for Darwin.

2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>

        * config/os/bsd/darwin/ppc-extra.ver: Add matching for
        to_chars and from_chars for long double.

2021-03-15  Patrick Palka  <ppalka@redhat.com>

        * include/bits/max_size_type.h (__max_size_type::operator _Tp):
        Fix formatting.
        (__max_size_type::operator++): Define.
        (__max_size_type::operator--): Likewise.
        (__max_size_type::operator<=>): Conditionally define (in place
        of the other comparison operators).
        (__max_diff_type::operator _Tp): Fix formatting.
        (__max_diff_type::operator++): Define.
        (__max_diff_type::operator--): Likewise.
        (__max_diff_type::operator<=>): Conditionally define (in place
        of the other comparison operators).
        * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
        these operator overloads.

2021-03-15  Caroline Tice  <cmtice@google.com>

        PR libstdc++/99172
        * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
        AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
        AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
        filtered out.
        * src/Makefile.in: Regenerate.

2021-03-11  Patrick Palka  <ppalka@redhat.com>

        * src/c++17/floating_to_chars.cc: Simplify the file as if
        __SIZEOF_INT128__ is always defined.
        [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
        a base-10 to_chars overload for the uint128_t class type.
        * src/c++17/uint128_t.h: New file.
        * testsuite/20_util/to_chars/long_double.cc: No longer expect an
        execution FAIL on targets that have a large long double type
        but lack __int128.

2021-03-11  Patrick Palka  <ppalka@redhat.com>

        * src/c++17/ryu/LOCAL_PATCHES: Update.
        * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
        * src/c++17/ryu/generic_128.h: Likewise.
        * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
        Use uint128_t instead of __uint128_t.
        (generic_binary_to_decimal): Likewise.

2021-03-11  Patrick Palka  <ppalka@redhat.com>

        * src/c++17/ryu/LOCAL_PATCHES: New file.

2021-03-11  Patrick Palka  <ppalka@redhat.com>

        * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
        defined alias of unsigned __int128.
        (floating_type_traits_binary128::mantissa_t): Use uint128_t
        instead of unsigned __int128.
        (floating_type_traits<long double>::mantissa_t)
        [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
        (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
        and uint32_t explicit.  Simplify the extraction of mantissa,
        exponent and sign bit.

2021-03-11  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/barrier (barrier::arrival_token): New move-only
        class that encapsulates the underlying token value.

2021-03-11  Jonathan Wakely  <jwakely@redhat.com>

        * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
        instead of unqualified() method.

2021-03-11  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99537
        * include/std/stop_token (_Stop_state_t::_M_release_ownership):
        Use acq_rel memory ordering.

2021-03-11  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99533
        * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
        helper function to check for permission denied errors.
        * src/filesystem/dir.cc (recursive_directory_iterator):
        Likewise.
        * src/filesystem/dir-common.h (is_permission_denied_error): New
        helper function.

2021-03-11  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99536
        * include/bits/random.h (normal_distribution): Use
        default-initializer for _M_saved and _M_saved_available.

2021-03-10  John David Anglin  <danglin@gcc.gnu.org>

        * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
        link with libatomic.
        * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
        * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
        * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
        * testsuite/30_threads/barrier/arrive.cc: Likewise.
        * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
        * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
        * testsuite/30_threads/barrier/completion.cc: Likewise.
        * testsuite/30_threads/latch/3.cc: Likewise.
        * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
        * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
        * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.

2021-03-10  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99413
        * include/bits/align.h: Include debug/assertions.h.
        * include/bits/codecvt.h: Include bits/c++config.h.
        * include/bits/enable_special_members.h: Likewise.
        * include/bits/erase_if.h: Likewise.
        * include/bits/functional_hash.h: Include <type_traits>.
        * include/bits/invoke.h: Include bits/move.h.
        * include/bits/ostream_insert.h: Include bits/exception_defines.h.
        * include/bits/parse_numbers.h: Include <type_traits>.
        * include/bits/predefined_ops.h: Include bits/c++config.h.
        * include/bits/range_access.h: Include bits/stl_iterator.h.
        * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
        * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
        * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
        * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
        * include/bits/unique_lock.h: Include bits/std_mutex.h.
        * include/debug/assertions.h: Include bits/c++config.h.

2021-03-10  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
        (ranges::equal_to, ranges::not_equal_to): Do not constrain
        with __eq_builtin_ptr_cmp.
        (ranges::less, ranges::greater, ranges::less_equal)
        (ranges::greater_equal): Do not constrain with
        __less_builtin_ptr_cmp.
        * libsupc++/compare (compare_three_way): Do not constrain with
        __3way_builtin_ptr_cmp.
        * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
        * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
        * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.

2021-03-10  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
        C++20 calendar types.

2021-03-06  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/99396
        * include/std/bit (__rotl, __rotr): Add optimized variants for power of
        two _Nd which the compiler can pattern match the rotates.

2021-03-04  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99382
        * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
        Make storage larger than required. Verify no write to the last
        element.
        * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
        Likewise.

2021-03-03  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.

2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

        * include/experimental/bits/simd.h: Replace reserved _X, _B by
        _Xp, _Bp.
        * include/experimental/bits/simd_builtin.h: Likewise.
        * include/experimental/bits/simd_x86.h: Likewise.

2021-02-27  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99301
        * include/std/chrono (year_month_day::_M_days_since_epoch()):
        Convert chrono::month and chrono::day to unsigned before
        converting to uint32_t.

2021-02-25  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/chrono (year_month_day::_S_from_days): Perform
        all calculations with type uint32_t.

2021-02-25  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/abi.xml: Document versioning for GCC 11.
        * doc/html/manual/abi.html: Regenerate.

2021-02-25  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99270
        * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
        FILE instead of FILE.

2021-02-25  Andreas Schwab  <schwab@suse.de>

        * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
        * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.

2021-02-25  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99265
        * include/std/chrono (year_month_day::_S_from_days): Cast long
        to int explicitly.

2021-02-25  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/utility (to_underlying): Define.
        * include/std/version (__cpp_lib_to_underlying): Define.
        * testsuite/20_util/to_underlying/1.cc: New test.
        * testsuite/20_util/to_underlying/version.cc: New test.

2021-02-24  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99261
        * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
        before value to be printed.

2021-02-24  Patrick Palka  <ppalka@redhat.com>

        * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
        Relax the condition that guards the printf code path to accept
        F128_type as well as long double.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

        * include/std/chrono (year_month_day_last:day): New
        implementation.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

        * include/std/chrono (year::is_leap): New implementation.
        * testsuite/std/time/year/2.cc: New test.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

        * include/std/chrono (year_month_day::_M_days_since_epoch):
        New implementation.
        * testsuite/std/time/year_month_day/4.cc: New test.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

        * include/std/chrono (year_month_day::_S_from_days): New
        implementation.
        * testsuite/std/time/year_month_day/3.cc: New test.

2021-02-24  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/98384
        * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
        (test01): Simplify verifying the nearby values by using a
        2-iteration loop and a dedicated output buffer to check that the
        nearby values are different.  Factor out the printf-based
        verification into a local function, and check that the leading
        hex digits agree before comparing to the output of printf.  Also
        verify the output by round-tripping it through from_chars.

2021-02-24  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/98389
        * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
        symbols for long double arguments mangled as 'g'.
        * config/os/gnu-linux/ldbl-extra.ver: Likewise.
        * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
        * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
        Use -mabi=ibmlongdouble for floating_to_chars.cc.
        * src/c++17/Makefile.in: Regenerate.
        * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
        New type defining type traits of IEEE binary128 format.
        (floating_type_traits<__float128>): Define specialization.
        (floating_type_traits<long double>): Define in terms of
        floating_type_traits_binary128 when appropriate.
        (floating_to_shortest_scientific): Handle __float128.
        (sprintf_ld): New function template for printing a long double
        or __ieee128 value using sprintf.
        (__floating_to_chars_shortest, __floating_to_chars_precision):
        Use sprintf_ld.
        (to_chars): Define overloads for __float128.

2021-02-24  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.

2021-02-23  Martin Sebor  <msebor@redhat.com>

        PR c++/99074
        * libsupc++/dyncast.cc (__dynamic_cast): Return null when
        first argument is null.

2021-02-23  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/99181
        * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
        test.

2021-02-23  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/99181
        * include/bits/char_traits.h (char_traits<char>::compare): For
        constexpr evaluation don't call
        __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
        directly.

2021-02-23  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/97549
        * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.

2021-02-23  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/98384
        * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
        the high- and low-order parts from an IBM long double value
        in an endian-agnostic way.

2021-02-19  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/atomic_wait.h (__thread_relax()): Call
        __thread_yield() not __gthread_yield().

2021-02-15  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/atomic_wait.h (__thread_yield()): Check
        _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
        (__thread_relax()): Use __thread_yield() instead of repeating
        the preprocessor checks for __gthread_yield.

2021-02-15  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/mutex (once_flag::_M_activate()): Add explicit
        return statement for passive case.
        (once_flag::_M_finish(bool)): Use reserved name for parameter.

2021-02-14  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99096
        * testsuite/util/testsuite_fs.h: Always include <unistd.h>.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88881
        * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/status_cxx2014.xml: Document implementation
        specific properties of std::experimental::filesystem::rename.
        * doc/xml/manual/status_cxx2017.xml: Document implementation
        specific properties of std::filesystem::rename.
        * doc/html/*: Regenerate.
        * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
        for directories on Windows.
        * src/filesystem/ops-common.h (__gnu_posix::rename): Use
        MoveFileExW on Windows.
        * testsuite/27_io/filesystem/operations/rename.cc: New test.
        * testsuite/experimental/filesystem/operations/rename.cc: New test.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/util/testsuite_fs.h (nonexistent_path): Add
        random number to the path.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/internet (address_v6::to_string): Include
        scope ID in string.
        * testsuite/experimental/net/internet/address/v6/members.cc:
        Test to_string() results.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/internet (address_v6::any): Avoid using
        memcpy in constexpr function.
        (address_v6::loopback): Likewise.
        (make_address_v6): Fix missing return statements on error paths.
        * include/experimental/io_context: Avoid -Wdangling-else
        warning.
        * testsuite/experimental/net/internet/address/v4/members.cc:
        Remove unused variables.
        * testsuite/experimental/net/internet/address/v6/members.cc:
        New test.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
        Add unused attribute to parameter.
        * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
        Likewise.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
        if -fno-rtti is used.
        * testsuite/30_threads/async/forced_unwind.cc: Expect test
        to abort if -fno-rtti is used.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/util/testsuite_allocator.h (memory_resource):
        Remove requirement for RTTI and exceptions to be enabled.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
        static_cast when RTTI is disabled.
        * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
        Likewise.
        * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
        Likewise.
        * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
        Likewise.
        * testsuite/27_io/basic_stringstream/str/char/2.cc:
        Likewise.
        * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
        Likewise.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
        as unused and only use dynamic_cast when RTTI is enabled.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99077
        * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
        Change int parameter to error_code, to match std::ios_failure.
        (__throw_ios_failure(const char*, int)): Construct error_code
        from int parameter.

2021-02-11  Jonathan Wakely  <jwakely@redhat.com>

        * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
        new macro.
        * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
        macro instead of _GLIBCXX_EH_PTR_COMPAT.
        (operator==): Likewise.

2021-02-11  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99058
        * doc/xml/manual/status_cxx2011.xml: Document when support
        became stable.
        * doc/xml/manual/status_cxx2014.xml: Likewise.
        * doc/xml/manual/status_cxx2017.xml: Likewise.
        * doc/html/manual/status.html: Regenerate.

2021-02-10  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88881
        * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.

2021-02-10  Jonathan Wakely  <jwakely@redhat.com>

        * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
        (fs::remove): Use std::system_category() for error codes from
        GetLastError().
        * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
        Likewise.

2021-02-10  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
        in __MINGW32__ macro name.
        * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
        * testsuite/27_io/filesystem/path/generation/proximate.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/generation/relative.cc:
        Likewise.
        * testsuite/util/testsuite_fs.h: Likewise.

2021-02-09  François Dumont  <fdumont@gcc.gnu.org>

        * include/bits/stl_tree.h
        (__has_is_transparent, __has_is_transparent_t): Move...
        * include/bits/stl_function.h: ...here.
        * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
        (_Hashtable_base<>::_M_equals_tr): New.
        * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
        _Hashtable<>::_M_equal_range_tr): New member function templates to perform
        heterogeneous lookup.
        (_Hashtable<>::_M_find_before_node_tr): New.
        (_Hashtable<>::_M_find_node_tr): New.
        * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
        unordered_map::contains<>, unordered_map::equal_range<>): New member function
        templates to perform heterogeneous lookup.
        (unordered_multimap::find<>, unordered_multimap::count<>,
        unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
        * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
        unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
        (unordered_multiset::find<>, unordered_multiset::count<>,
        unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
        * include/debug/unordered_map
        (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
        (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
        * include/debug/unordered_set
        (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
        (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
        * testsuite/23_containers/unordered_map/operations/1.cc: New test.
        * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
        * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
        * testsuite/23_containers/unordered_set/operations/1.cc: New test.

2021-02-09  François Dumont  <fdumont@gcc.gnu.org>

        * include/bits/stl_deque.h
        (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
        a null pointer test.

2021-02-09  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
        test directory after making it writable again.
        * testsuite/experimental/filesystem/operations/remove_all.cc:
        Likewise.

2021-02-09  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/99021
        * include/std/coroutine (coroutine_handle<P>::from_address): Add
        noexcept.

2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>

        * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
        * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.

2021-02-09  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/98465
        * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
        points to the characters moved by earlier _S_move, compute the source
        address using expression based on the __p pointer rather than __s
        pointer.

2021-02-03  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
        Add comparison with same category and different values.
        * testsuite/19_diagnostics/error_code/operators/less.cc:
        Likewise. Fix comparison involving different categories.
        * testsuite/19_diagnostics/error_code/operators/three_way.cc:
        Likewise.
        * testsuite/19_diagnostics/error_condition/operators/less.cc:
        Add comment.
        * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
        Likewise.

2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>

        * include/experimental/bits/simd_neon.h: Replace repeated vpadd
        calls with a single vaddv for aarch64.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/Makefile.am: Warn about the workaround. Add
        -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
        Improve initial user feedback from make check-simd.
        * testsuite/Makefile.in: Regenerated.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * include/experimental/bits/simd.h: Add __detail::_Minimum and
        __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
        Add hmin and hmax overloads for simd and const_where_expression.
        * include/experimental/bits/simd_scalar.h
        (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
        parameter const-ref to allow calling _S_reduce with an rvalue.
        * testsuite/experimental/simd/tests/reductions.cc: Add tests for
        hmin and hmax. Since the compiler statically determined that all
        tests pass, repeat the test after a call to make_value_unknown.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
        instruction pointer data member. Ensure that the `if (m_failed)`
        branch is always inlined into the calling code. The body of the
        conditional can still be a function call. Move the get_ip call
        into the verify ctor to simplify the ctor calls.
        (COMPARE): Don't mention the use of all_of for reduction of a
        simd_mask. It only distracts from the real issue.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/driver.sh: Abstract reading test
        options into read_src_option function. Read skip, only,
        expensive, and xfail via read_src_option. Add timeout and
        timeout-factor options and adjust timeout variable accordingly.
        * testsuite/experimental/simd/tests/loadstore.cc: Set
        timeout-factor 2.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/driver.sh: When handling the pipe
        to log (and on verbose to stdout) count the lines. If it exceeds
        1000 log the issue and exit 125, which is then handled as a
        failure.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
        markup for long double on powerpc64*.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * include/experimental/bits/simd.h: Add __have_power10vec
        conditional on _ARCH_PWR10.
        * include/experimental/bits/simd_builtin.h: Forward declare
        _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
        defined.
        (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
        _SuperImpl for optimizations and correctness.
        * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
        (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
        Otherwise, for >=int use -vec_sums divided by a sizeof factor.
        For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/driver.sh: Remove executable on
        SIGINT. Process compiler and test executable output: In verbose
        mode print messages immediately, limited to 1000 lines and
        breaking long lines to below $COLUMNS (or 1024 if not set).
        Communicating the exit status of the compiler / test with the
        necessary pipe is done via a message through stdout/-in.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/Makefile.am: Ensure .simd.summary is empty before
        collecting a new summary.
        * testsuite/Makefile.in: Regenerate.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/generate_makefile.sh: Use
        different variables internally than documented for user
        overrides. This makes internal append/prepend work as intended.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/driver.sh (verify_test): Print
        test output on run xfail. Do not repeat lines from the log that
        were already printed on stdout.
        (test_selector): Make the compiler flags pattern usable as a
        substring selector.
        (toplevel): Trap on SIGINT and remove the log and sum files.
        Call timout with --foreground to quickly terminate on SIGINT.
        * testsuite/experimental/simd/generate_makefile.sh: Simplify run
        targets via target patterns. Default DRIVEROPTS to -v for run
        targets. Remove log and sum files after completion of the run
        target (so that it's always recompiled).
        Place help text into text file for reasonable 'make help'
        performance.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * include/experimental/bits/simd.h: Remove unnecessary static
        assertion. Allow sizeof(8) integer __intrinsic_type to enable
        the necessary mask type.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * include/experimental/bits/simd.h: Let __intrinsic_type<long
        double, N> be valid if sizeof(long double) == sizeof(double) and
        use a __vector double as member type.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * include/experimental/bits/simd.h (__is_intrinsic_type): New
        internal type trait. Alias for __is_vector_type on x86.
        (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
        __vector_type.
        (__intrin_bitcast): Allow casting to & from vector & intrinsic
        types.
        (__intrinsic_type): Explicitly specialize for NEON intrinsic
        vector types.

2021-02-03  Matthias Kretz  <kretz@kde.org>

        * testsuite/experimental/simd/driver.sh: Implement skip, only,
        expensive, and xfail markers. They can select on type, ABI tag
        subset number, target-triplet, and compiler flags.
        * testsuite/experimental/simd/generate_makefile.sh: The summary
        now includes lines for unexpected passes and expected failures.
        If the skip or only markers are only conditional on the type, do
        not generate rules for those types.
        * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
        for ABI tag subsets 1-9.
        * 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/generator.cc: Ditto.
        * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
        * testsuite/experimental/simd/tests/loadstore.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_loadstore.cc: Ditto.
        * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
        * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
        * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
        * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
        * testsuite/experimental/simd/tests/operators.cc: Ditto.
        * testsuite/experimental/simd/tests/reductions.cc: Ditto.
        * testsuite/experimental/simd/tests/simd.cc: Ditto.
        * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
        * testsuite/experimental/simd/tests/splits.cc: Ditto.
        * testsuite/experimental/simd/tests/where.cc: Ditto.
        * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
        addition replace "test only floattypes" marker by unconditional
        "float|double|ldouble" only marker.
        * testsuite/experimental/simd/tests/frexp.cc: Ditto.
        * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
        * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
        Ditto.
        * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
        * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
        * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
        * testsuite/experimental/simd/tests/remqo.cc: Ditto.
        * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
        * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
        * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
        addition, xfail on run because the reference data is missing.

2021-02-02  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
        * doc/xml/manual/status_cxx2014.xml: Likewise.
        * doc/xml/manual/status_cxx2017.xml: Likewise.
        * doc/html/manual/status.html: Regenerate.

2021-02-01  François Dumont  <fdumont@gcc.gnu.org>

        PR libstdc++/70303
        * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
        Return 0 if both iterators are value-initialized.
        * testsuite/23_containers/deque/70303.cc: New test.
        * testsuite/23_containers/vector/70303.cc: New test.

2021-02-01  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/status_cxx2011.xml: Update std::call_once
        status.
        * doc/xml/manual/status_cxx2014.xml: Likewise.
        * doc/xml/manual/status_cxx2017.xml: Likewise. Update
        std::from_chars and std::to_chars status. Fix formatting.
        * doc/html/manual/status.html: Regenerate.

2021-01-28  Jonathan Wakely  <jwakely@redhat.com>

        * include/experimental/bits/numeric_traits.h: Update copyright
        dates.
        * include/experimental/bits/simd.h: Likewise.
        * include/experimental/bits/simd_builtin.h: Likewise.
        * include/experimental/bits/simd_converter.h: Likewise.
        * include/experimental/bits/simd_detail.h: Likewise.
        * include/experimental/bits/simd_fixed_size.h: Likewise.
        * include/experimental/bits/simd_math.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.
        * include/experimental/bits/simd_x86_conversions.h: Likewise.
        * include/experimental/simd: Likewise.
        * testsuite/experimental/simd/*: Likewise.

2021-01-27  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
        * doc/html/*: Regenerate.

2021-01-27  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/experimental/simd/generate_makefile.sh: Use printf
        instead of echo when printing escape characters.

2021-01-27  Matthias Kretz  <kretz@kde.org>

        * scripts/check_simd: New file. This script is called from the
        the check-simd target. It determines a set of compiler flags and
        simulator setups for calling generate_makefile.sh and passes the
        information back to the check-simd target, which recurses to the
        generated Makefiles.
        * scripts/create_testsuite_files: Remove files below simd/tests/
        from testsuite_files and place them in testsuite_files_simd.
        * testsuite/Makefile.am: Add testsuite_files_simd. Add
        check-simd target.
        * testsuite/Makefile.in: Regenerate.
        * testsuite/experimental/simd/driver.sh: New file. This script
        compiles and runs a given simd test, logging its output and
        status. It uses the timeout command to implement compile and
        test timeouts.
        * testsuite/experimental/simd/generate_makefile.sh: New file.
        This script generates a Makefile which uses driver.sh to compile
        and run the tests and collect the logs into a single log file.
        * testsuite/experimental/simd/tests/abs.cc: New file. Tests
        abs(simd).
        * testsuite/experimental/simd/tests/algorithms.cc: New file.
        Tests min/max(simd, simd).
        * testsuite/experimental/simd/tests/bits/conversions.h: New
        file. Contains functions to support tests involving conversions.
        * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
        Support functions make_mask and make_vec.
        * testsuite/experimental/simd/tests/bits/mathreference.h: New
        file. Support functions to supply precomputed math function
        reference data.
        * testsuite/experimental/simd/tests/bits/metahelpers.h: New
        file. Support code for SFINAE testing.
        * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
        * testsuite/experimental/simd/tests/bits/test_values.h: New
        file. Test functions to easily drive a test with simd objects
        initialized from a given list of values and a range of random
        values.
        * testsuite/experimental/simd/tests/bits/ulp.h: New file.
        Support code to determine the ULP distance of simd objects.
        * testsuite/experimental/simd/tests/bits/verify.h: New file.
        Test framework for COMPARE'ing simd objects and instantiating
        the test templates with value_type and ABI tag.
        * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
        simd broadcasts.
        * testsuite/experimental/simd/tests/casts.cc: New file. Test
        simd casts.
        * testsuite/experimental/simd/tests/fpclassify.cc: New file.
        Test floating-point classification functions.
        * testsuite/experimental/simd/tests/frexp.cc: New file. Test
        frexp(simd).
        * testsuite/experimental/simd/tests/generator.cc: New file. Test
        simd generator constructor.
        * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
        Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
        * testsuite/experimental/simd/tests/integer_operators.cc: New
        file. Test integer operators.
        * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
        New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
        modf(simd).
        * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
        (converting) simd loads and stores.
        * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
        log*(simd).
        * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
        Test simd_mask broadcasts.
        * testsuite/experimental/simd/tests/mask_conversions.cc: New
        file. Test simd_mask conversions.
        * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
        file. Test simd_mask implicit conversions.
        * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
        Test simd_mask loads and stores.
        * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
        file. Test simd_mask operators convert as specified.
        * testsuite/experimental/simd/tests/mask_operators.cc: New file.
        Test simd_mask compares, subscripts, and negation.
        * testsuite/experimental/simd/tests/mask_reductions.cc: New
        file. Test simd_mask reductions.
        * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
        1-arg math functions on simd.
        * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
        2-arg math functions on simd.
        * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
        Test implicit conversions on simd binary operators behave as
        specified.
        * testsuite/experimental/simd/tests/operators.cc: New file. Test
        simd compares, subscripts, not, unary minus, plus, minus,
        multiplies, divides, increment, and decrement.
        * testsuite/experimental/simd/tests/reductions.cc: New file.
        Test reduce(simd).
        * testsuite/experimental/simd/tests/remqo.cc: New file. Test
        remqo(simd).
        * testsuite/experimental/simd/tests/simd.cc: New file. Basic
        sanity checks of simd types.
        * testsuite/experimental/simd/tests/sincos.cc: New file. Test
        sin(simd) and cos(simd).
        * testsuite/experimental/simd/tests/split_concat.cc: New file.
        Test split(simd) and concat(simd, simd).
        * testsuite/experimental/simd/tests/splits.cc: New file. Test
        split(simd_mask).
        * testsuite/experimental/simd/tests/trigonometric.cc: New file.
        Test remaining trigonometric functions on simd.
        * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
        file. Test trunc(simd), ceil(simd), and floor(simd).
        * testsuite/experimental/simd/tests/where.cc: New file. Test
        masked operations using where.

2021-01-27  Matthias Kretz  <kretz@kde.org>

        * doc/xml/manual/status_cxx2017.xml: Add implementation status
        of the Parallelism TS 2. Document implementation-defined types
        and behavior.
        * include/Makefile.am: Add new headers.
        * include/Makefile.in: Regenerate.
        * include/experimental/simd: New file. New header for
        Parallelism TS 2.
        * include/experimental/bits/numeric_traits.h: New file.
        Implementation of P1841R1 using internal naming. Addition of
        missing IEC559 functionality query.
        * include/experimental/bits/simd.h: New file. Definition of the
        public simd interfaces and general implementation helpers.
        * include/experimental/bits/simd_builtin.h: New file.
        Implementation of the _VecBuiltin simd_abi.
        * include/experimental/bits/simd_converter.h: New file. Generic
        simd conversions.
        * include/experimental/bits/simd_detail.h: New file. Internal
        macros for the simd implementation.
        * include/experimental/bits/simd_fixed_size.h: New file. Simd
        fixed_size ABI specific implementations.
        * include/experimental/bits/simd_math.h: New file. Math
        overloads for simd.
        * include/experimental/bits/simd_neon.h: New file. Simd NEON
        specific implementations.
        * include/experimental/bits/simd_ppc.h: New file. Implement bit
        shifts to avoid invalid results for integral types smaller than
        int.
        * include/experimental/bits/simd_scalar.h: New file. Simd scalar
        ABI specific implementations.
        * include/experimental/bits/simd_x86.h: New file. Simd x86
        specific implementations.
        * include/experimental/bits/simd_x86_conversions.h: New file.
        x86 specific conversion optimizations. The conversion patterns
        work around missing conversion patterns in the compiler and
        should be removed as soon as PR85048 is resolved.
        * testsuite/experimental/simd/standard_abi_usable.cc: New file.
        Test that all (not all fixed_size<N>, though) standard simd and
        simd_mask types are usable.
        * testsuite/experimental/simd/standard_abi_usable_2.cc: New
        file. As above but with -ffast-math.
        * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
        from the standard test loop. Instead use
        check_vect_support_and_set_flags to build simd tests with the
        relevant machine flags.

2021-01-27  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/66414
        * include/bits/string_view.tcc
        (basic_string_view::find(const CharT*, size_type, size_type)):
        Optimize.

2021-01-27  Paul Fee  <paul.f.fee@gmail.com>

        * include/bits/basic_string.h (basic_string::contains): New
        member functions.
        * include/std/string_view (basic_string_view::contains):
        Likewise.
        * include/std/version (__cpp_lib_string_contains): Define.
        * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
        Remove trailing whitespace.
        * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
        Likewise.
        * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
        * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
        * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
        * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
        * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.

2021-01-21  Jonathan Wakely  <jwakely@redhat.com>

        * src/c++17/Makefile.in: Regenerate.

2021-01-20  David Edelsohn  <dje.gcc@gmail.com>

        * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
        _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
        __lc_type.
        (const char* ctype<char>:: is): Same.

2021-01-18  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/98725
        * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
        write to a wide character stream if wide character support is
        disabled in the library.

2021-01-18  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
        stringbuf not wstringbuf.

2021-01-18  Jakub Jelinek  <jakub@redhat.com>

        PR debug/98708
        * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
        Compile with -gno-as-loc-support.
        * src/c++11/Makefile.in: Regenerated.

2021-01-16  H.J. Lu  <hjl.tools@gmail.com>

        * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
        Add -fcf-protection=none to -march=i486.

2021-01-14  François Dumont  <fdumont@gcc.gnu.org>

        * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
        compliant.

2021-01-14  Alexandre Oliva  <oliva@adacore.com>

        * testsuite/30_threads/future/members/poll.cc: Calibrate
        iteration count.

2021-01-14  François Dumont  <fdumont@gcc.gnu.org>

        PR libstdc++/98466
        * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
        (_Node_iterator()): Make default.
        (_Node_const_iterator()): Make default.
        * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
        iterator checks.
        * include/debug/safe_iterator.h
        (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
        * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
        Likewise.
        * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
        _M_singular checks on input iterators.
        * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
        checks.
        * testsuite/23_containers/deque/debug/98466.cc: New test.
        * testsuite/23_containers/unordered_map/debug/98466.cc: New test.

2021-01-14  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/98471
        * include/bits/fs_path.h (__throw_conversion_error): New
        function to throw or abort on character conversion errors.
        (__wstr_from_utf8): Move definition after filesystem_error has
        been defined. Use __throw_conversion_error.
        (path::_S_convert<_EcharT>): Use __throw_conversion_error.
        (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
        (path::u8string): Likewise.

2021-01-14  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/barrier: Update copyright years. Fix whitespace.
        * include/std/version: Fix whitespace.
        * testsuite/30_threads/barrier/1.cc: Update copyright years.
        * testsuite/30_threads/barrier/2.cc: Likewise.
        * testsuite/30_threads/barrier/arrive.cc: Likewise.
        * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
        * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
        * testsuite/30_threads/barrier/completion.cc: Likewise.

2021-01-13  Jonathan Wakely  <jwakely@redhat.com>

        * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.

2021-01-10  David Edelsohn  <dje.gcc@gmail.com>

        PR libstdc++/98613
        * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
        warning.
        * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.

2021-01-08  Olivier Hainque  <hainque@adacore.com>

        * testsuite/20_util/bind/ref_neg.cc: Tweak the
        dg-prune-output regex for out-of-build-tree contexts.

2021-01-07  Thomas Rodgers  <trodgers@redhat.com>

        * doc/doxygen/user.cfg.in: Add new header.
        * include/Makefile.am (std_headers): likewise.
        * include/Makefile.in: Regenerate.
        * include/precompiled/stdc++.h: Add new header.
        * include/std/barrier: New file.
        * include/std/version: Add __cpp_lib_barrier feature test macro.
        * testsuite/30_threads/barrier/1.cc: New test.
        * testsuite/30_threads/barrier/2.cc: Likewise.
        * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
        * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
        * testsuite/30_threads/barrier/arrive.cc: Likewise.
        * testsuite/30_threads/barrier/completion.cc: Likewise.

2021-01-07  Patrick Palka  <ppalka@redhat.com>

        PR libstdc++/98384
        * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
        instead of the non-standard nextupl and nextdownl.

2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>

        * configure: Re-generate.

2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>

        * include/precompiled/stdc++.h: Add <source_location> to C++20 section.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

        * ChangeLog-2020: Rotate ChangeLog.  New file.

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