Roll libc++ from b16984ce99c7 to 944eeec7c303 (199 revisions)

This change includes a patch to add `-Wno-microsoft-cast` as
a temporary workaround to windows bot failures.

This change causes a large increase in binary size that is likely
due to `_LIBCPP_ABI_VECTOR_LAYOUT_SIZE_BASED`. However, we cannot
disable that feature as a separate PR introduced a change that
requires complete types to call `empty()` on vectors, which breaks
our builds. It is also possible that new PGO profiles will reduce
the binary size, so we should land this to compare canary binary sizes
in a couple days. If the profiles don't change anything we can revert
this roll. See the linked bug crbug.com/534049474 for more discussion
around the binary size increase.

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/b16984ce99c7..944eeec7c303

2026-07-14 liza@chromium.org [libc++][pstl] Add missing #pragma GCC system_header to libdispatch.h (#209579)
2026-07-14 fpiovezan@apple.com Revert "[libc++][NFC] Inline std::function members into the class body" (#209555)
2026-07-14 hghristov.rmm@gmail.com [libc++][ranges][NFC] Format `view.interface.pass.cpp` (#209391)
2026-07-14 ldionne.2@gmail.com [libc++][NFC] Remove unused <cassert> from algorithm benchmarks (#209492)
2026-07-14 douglas.yung@sony.com Bump version to 24.0.0git (#209473)
2026-07-14 nikolasklauser@berlin.de [libc++][NFC] Inline std::function members into the class body (#209461)
2026-07-14 open-source@inquisitivecrystal.addy.io [libc++] Mark LWG3403 as complete (#208866)
2026-07-14 ldionne.2@gmail.com [libc++] Improve diagnostic for libcxxabi missing from the runtimes (#208274)
2026-07-14 ldionne.2@gmail.com [libc++] Fix usage of constructive interference when we meant destructive (#208804)
2026-07-14 phosek@google.com [libcxx][libcxxabi] Remove OVERRIDABLE_FUNCTION macro (#209323)
2026-07-14 phosek@google.com [libcxx] Rename __libcpp_launder to __launder_function_pointer (#209320)
2026-07-13 jonathan_roelofs@apple.com [libcxx][test] Fingerprint the compiler when memoizing results (#208311)
2026-07-13 aidengrossman@google.com [libcxx] Avoid including deprecated ClangTidyModuleRegistry.h (#208945)
2026-07-13 emmettzhang2020@outlook.com [libc++][unique_ptr] Implement LWG 4144: Disallow unique_ptr<T&, D> (#209018)
2026-07-13 liza@chromium.org [libc++] Add missing include to thread.h (#208740)
2026-07-13 de34@live.cn [libc++] Backport P3029R1 Better `mdspan`'s CTAD to C++20/23 (#208132)
2026-07-13 Jake.egan@ibm.com [libc++] Fix filesystem::remove_all bug with read-only nested directory (#197104)
2026-07-13 nikolasklauser@berlin.de [libc++][NFC] Remove unused includes from <__iterator/segmented_iterator.h> (#209105)
2026-07-13 nikolasklauser@berlin.de [libc++] Refactor the string benchmarks (#185397)
2026-07-11 mike.kazakov@gmail.com [libc++][pstl] Default implementation of parallel std::reverse_copy (#208085)
2026-07-11 aidengrossman@google.com [libcxx] Bump runner set (#208929)
2026-07-11 phosek@google.com [libcxx][NFC] Move release notes for MSVC's implementation of exception_ptr (#208883)
2026-07-11 phosek@google.com [libc++] Replace the of use custom sections for detecting overriden functions (#208330)
2026-07-10 aidengrossman@google.com [libcxx] Bump GitHub runner version (#208823)
2026-07-10 yronglin777@gmail.com [libc++] Bump base image version to most recent (#208776)
2026-07-10 ldionne.2@gmail.com [libc++] Merge atomic-wait contention tables into a single table (#208493)
2026-07-10 stl@nuwen.net [libc++] Add MSVC's implementation of exception_ptr for Windows (#94977)
2026-07-10 yronglin777@gmail.com [libc++] Update the base image hash to get most recent clang-23 (#208766)
2026-07-10 ldionne.2@gmail.com [libc++] Add benchmarks for std::is_heap and std::is_heap_until (#207045)
2026-07-10 nikolasklauser@berlin.de [libc++] Fix shared_ptr not accepting allocators with explicit conversions (#208439)
2026-07-10 ldionne.2@gmail.com [libc++] Rename the macro for the LLVM 18 ABI tag used in ranges (#208464)
2026-07-10 ldionne.2@gmail.com [libc++] Remove diagnostic about _LIBCPP_ABI_NO_ITERATOR_BASES (#208460)
2026-07-09 hehiralbi@gmail.com [libc++] Enable missing allocator constructors in C++11 (#204845)
2026-07-09 nikolasklauser@berlin.de [libc++] Remove benchmark::DoNotOptimize from custom predicates in benchmarks (#208412)
2026-07-09 ldionne.2@gmail.com [libc++] Mark LWG4276 as complete (#208273)
2026-07-09 ldionne.2@gmail.com [libc++] Add tests for LWG3949 and mark it as done (#208272)
2026-07-09 ldionne.2@gmail.com [libc++] Fix assign_range test for forward_list (#208283)
2026-07-09 ldionne.2@gmail.com [libc++][NFC] Rename forward_list constructor tests (#208301)
2026-07-09 aokblast@FreeBSD.org [libc++] Update the label for FreeBSD in CI to version 15.1 (#205417)
2026-07-09 ldionne.2@gmail.com [libc++] Add missing <string> include (#208281)
2026-07-09 ldionne.2@gmail.com [libc++][NFC] Fix comment about size-based vector (#208463)
2026-07-09 aviipatel06@gmail.com [libc++] Implement LWG4472: std::atomic_ref<const T> can be constructed from temporaries (#208131)
2026-07-09 github.snugness349@passinbox.com [libc++][ranges] Applied [[nodiscard]] to `lazy_split` (#208036)
2026-07-09 nikolasklauser@berlin.de [libc++] Remove some unnecessary functions from __vector_layout (#207152)
2026-07-08 mike.kazakov@gmail.com [libc++][pstl] Default implementation of parallel std::find_first_of (#206328)
2026-07-08 michaelrj@google.com [libcxx][NFC] Move guards outside namespace (#208089)
2026-07-08 thoughtsoflifeandlight17@gmail.com [libc++] Implement LWG3918: copy elision in `std::uninitialized_move/_n` (#207692)
2026-07-08 emmettzhang2020@outlook.com [libc++][chrono] Implement LWG 4481: Disallow `chrono::duration<const T, P>` (#207558)
2026-07-08 phosek@google.com Revert "[libc++] Replace the of use custom sections for detecting overriden functions" (#208157)
2026-07-08 phosek@google.com [libc++] Replace the of use custom sections for detecting overriden functions (#175896)
2026-07-07 hghristov.rmm@gmail.com [libc++][ranges] Applied `[[nodiscard]]` to `zip_view` (#207667)
2026-07-07 anthonycalandra@geotab.com [libc++][ThreadSafety] Add thread safety annotations for variadic std::scoped_lock (#204462)
2026-07-07 benjamin.luke@sony.com [clang][X86] Emit AVX level mismatch psABI warnings on function definitions (#199091)
2026-07-07 c8ef@outlook.com [libc++] Mark LWG3585 as resolved (#207717)
2026-07-07 github.snugness349@passinbox.com [libc++][ranges] Applied [[nodiscard]] to `join_view` (#206838)
2026-07-07 github.snugness349@passinbox.com [libc++][ranges] Applied [[nodiscard]] to `adjacent_transform_view` (#205900)
2026-07-06 hghristov.rmm@gmail.com [libc++][ranges] Applied `[[nodiscard]]` to `views::zip_transform` (#207120)
2026-07-06 aliaksei.urbanski@gmail.com [NFC] Fix "is is" typos (#206288)
2026-07-06 github.snugness349@passinbox.com [libc++][ranges] Applied [[nodiscard]] to `elements_view` (#206589)
2026-07-06 ldionne.2@gmail.com [libc++] Make atomic contention tables constinit (#207456)
2026-07-06 nikolasklauser@berlin.de [libc++] Use _LIBCPP_KEEP_TRANSITIVE_INCLUDES_LLVM23 in <future> (#207668)
2026-07-06 nikolasklauser@berlin.de [libc++] Split the multidimensional algorithms out of uninitialized_algorithms.h (#207447)
2026-07-06 vinay_deshmukh@outlook.com [libc++] Make `<set>` `std::multiset` constexpr as part of P3372R3 (#206257)
2026-07-05 nikolasklauser@berlin.de [libc++] Add an ABI flag to optimize mersenne_twister_engine (#206423)
2026-07-05 nikolasklauser@berlin.de [libc++] Use std::to_chars to format thread::id and canonicalize the representation across platforms (#181624)
2026-07-05 github.snugness349@passinbox.com [libc++] Mark LWG4098 as resolved (#206295)
2026-07-05 c8ef@outlook.com [libc++] Mark LWG3454 as resolved (#207487)
2026-07-03 ldionne.2@gmail.com [libc++] Fix SPEC benchmarks not producing a .lnt result file (#207450)
2026-07-03 hghristov.rmm@gmail.com [libc++][ranges] Enable CPO compile tests (#207123)
2026-07-03 c8ef@outlook.com [libc++] Add assert test for string assign/append (#207164)
2026-07-03 nikolasklauser@berlin.de [libc++] Base string's alignment on __STDCPP_DEFAULT_NEW_ALIGNMENT__ (#171785)
2026-07-03 nikolasklauser@berlin.de [libc++] Use _LIBCPP_NO_UNIQUE_ADDRESS for the new vector layout (#207149)
2026-07-02 ldionne.2@gmail.com [libc++][NFC] Move the lower_bound/upper_bound benchmark to the sorting directory (#207215)
2026-07-02 roche@httrack.com [libc++][test] Cover byteswap _BitInt padding on every ABI with width 72 (#206360)
2026-07-02 nikolasklauser@berlin.de [libc++] Remove _LIBCPP_COMPRESSED_PAIR from packaged_task (#200642)
2026-07-02 nikolasklauser@berlin.de Reapply "[libc++] Optimize fstream::read" (#206453)
2026-07-02 nikolasklauser@berlin.de Revert "[libc++] Move threading and random device config into <__configuration/platform.h>" (#207134)
2026-07-01 vinay_deshmukh@outlook.com [NFC][libc++] Fix formatting for `<set>` tests (#207080)
2026-07-01 nikolasklauser@berlin.de [libc++] Remove projection from __lower_bound_onesided (#206676)
2026-07-01 cjdb@google.com [libc++] Add a size-based representation for `vector` in the unstable ABI (#155330)
2026-07-01 nikolasklauser@berlin.de [libc++] Move threading and random device config into <__configuration/platform.h> (#206262)
2026-07-01 george.burgess.iv@gmail.com [libc++] Add Android assertion handler (#198831)
2026-07-01 aokblast@FreeBSD.org [libcxx] Enable std module test on FreeBSD (#206269)
2026-07-01 vonosmas@gmail.com [libc++] Assume that <wchar.h> in llvm-libc has const-overloads. (#206805)
2026-07-01 de34@live.cn [libc++] Fix behavior for `get_temporary_buffer` with non-positive size (#206871)
2026-07-01 nikolasklauser@berlin.de [libc++] Don't make libc++ headers system headers in the modulemap (#205509)
2026-07-01 nikolasklauser@berlin.de [libc++] Don't #define __unused with glibc in system_reserved_names.gen.py (#206971)
2026-07-01 c8ef@outlook.com [libc++] Implement LWG3662 basic_string::append/assign(NTBS, pos, n) suboptimal (#206320)
2026-07-01 Matthew.Arsenault@amd.com [runtimes][NFC] Re-indent shared library blocks (#205523)
2026-07-01 wtranviet@proton.me [libc++] Resolve LWG4366: Heterogeneous comparison of `expected` may be ill-formed  (#185342)
2026-06-30 xavier.roche@algolia.com [libc++][test][NFC] Remove implementation-detail noise from _BitInt test comments (#206666)
2026-06-30 vinay_deshmukh@outlook.com [libc++] Make `<set>` `std::set` constexpr as part of P3372R3 (#167241)
2026-06-29 phosek@google.com [CMake] Warn when the version of CMake is older than 3.31.0 (#204203)
2026-06-29 ikudrin@accesssoftek.com [libc++] Do not remove a root-name followed by ".." in `path::lexically_normal()` (#201261)
2026-06-29 vvereschaka@accesssoftek.com [libc++][test] XFAIL `text/text_encoding/environment.pass.cpp` test on Armv7/Linux Ubuntu targets. (#206188)
2026-06-29 de34@live.cn [libc++] Implement LWG4125: `move_iterator`'s default constructor should be constrained (#206427)
2026-06-29 paulxicao7@gmail.com [libc++] LWG4557: Remove `constexpr` from `owner_less` and `owner_before` (#191534)
2026-06-29 de34@live.cn [libc++][docs] Remove superfluous entries for P1286R2 and P2085R0 (#166116)
2026-06-29 Matthew.Arsenault@amd.com [runtimes] Don't create shared library targets when unsupported (#205517)
2026-06-29 nikolasklauser@berlin.de [libc++] Consistently use version guards outside namespace macros (#181136)
2026-06-29 c8ef@outlook.com [libc++] Mark LWG4084 as resolved (#206224)
2026-06-29 github.snugness349@passinbox.com [libc++][ranges] Applied [[nodiscard]] to `adjacent_view` (#205206)
2026-06-28 xavier.roche@algolia.com [libc++][test] Drop _BitInt(96) byteswap padding check on 32-bit x86 (#205295)
2026-06-27 aokblast@FreeBSD.org [libc++][FreeBSD] Fix localization test on FreeBSD (#186066)
2026-06-27 nikolasklauser@berlin.de [libc++][NFC] Mark random_device::__padding_ as [[maybe_unused]] (#206248)
2026-06-27 c8ef@outlook.com [libc++] Mark LWG3498 as resolved (#206078)
2026-06-27 nikolasklauser@berlin.de [libc++] Fix shared_ptr rebinding allocators to incomplete types (#206145)
2026-06-26 de34@live.cn [libc++] Specify `encoding='utf-8'` in `conformance` script (#189534)
2026-06-26 ldionne.2@gmail.com [libc++] Fix instantiation of incomplete type when evaluating tuple comparisons (#204679)
2026-06-26 nikolasklauser@berlin.de [libc++] Split the PSTL configuration macros into a separate header (#205531)
2026-06-26 hghristov.rmm@gmail.com [libc++][ranges] Apply `[[nodiscard]]` to `istream_view` (#205154)
2026-06-26 nikolasklauser@berlin.de [libc++] Move compiler-specific configuration into <__configuration/compiler.h> (#205590)
2026-06-26 nikolasklauser@berlin.de [libc++] Remove _BitScanForward{,64} (#205551)
2026-06-26 nikolasklauser@berlin.de [libc++] Move _LIBCPP_FOPEN_CLOEXEC_MODE to <fstream> (#205537)
2026-06-26 nikolasklauser@berlin.de [libc++][NFC] Simplify the implementation of aligned_union (#185449)
2026-06-26 wtranviet@proton.me [libc++] Cast 0 to `__locale_t` in `text_encoding.cpp` (#205882)
2026-06-26 jdoerfert.llvm@gmail.com Revert "[Instrumentor] Add runtime examples: [1/N] A flop counter" (#205960)
2026-06-26 jdoerfert.llvm@gmail.com [Instrumentor] Add runtime examples: [1/N] A flop counter (#205698)
2026-06-25 de34@live.cn Revert "[libc++]  P3798R1: The unexpected in std::expected (#204826)" (#205597)
2026-06-25 hghristov.rmm@gmail.com [libc++][ranges] Applied `[[nodiscard]]` to `split_view` (#205161)
2026-06-25 hghristov.rmm@gmail.com [libc++][ranges] Applied `[[nodiscard]]` to `take_while_view` (#205172)
2026-06-25 nikolasklauser@berlin.de [libc++] Fix move-only types in std::make_shared (#205819)
2026-06-25 ldionne.2@gmail.com [libc++] Add missing ABI changelog entry for #173283 (#205887)
2026-06-25 nikolasklauser@berlin.de [libc++] Remove __broadcast simd function (#205559)
2026-06-25 de34@live.cn [libc++] Add missing attribute usages to `<__memory/shared_ptr.h>` (#205776)
2026-06-25 nikolasklauser@berlin.de [libc++] Remove _LIBCPP_COMPRESSED_PAIR/TRIPLE from shared_ptr (#200401)
2026-06-25 wtranviet@proton.me [libc++] Add implementations of `__get_locale_encoding(...)` to Fuschia and LLVM-Libc (#205716)
2026-06-25 nikolasklauser@berlin.de [libc++] Enable clang-tidy in the CI again (#195047)
2026-06-24 wtranviet@proton.me [libc++] Implement P1885R12: `<text_encoding>` (#141312)
2026-06-24 scott.linder@amd.com [docs] Create utils/docs (#203962)
2026-06-24 github.snugness349@passinbox.com [libc++][ranges] Applied [[nodiscard]] to `transform_view` (#204014)
2026-06-24 de34@live.cn [libc++] Apply `[[nodiscard]]` to `wstring_convert`, `wbuffer_convert` (#205486)
2026-06-24 nikolasklauser@berlin.de [libc++][C++03] Cherry-pick #106832 (#205547)
2026-06-24 nikolasklauser@berlin.de [libc++] Remove <features.h> include from <__config> (#205549)
2026-06-24 nikolasklauser@berlin.de [libc++] Move <features.h> include to <__configuration/platform.h> (#205548)
2026-06-24 nikolasklauser@berlin.de [libc++] Move _LIBCPP_CONCAT{,3} to <__configuration/utility.h> (#205533)
2026-06-24 nikolasklauser@berlin.de [libc++] Move constexpr/explicit macros to <__configuration/language.h> (#205535)
2026-06-24 hghristov.rmm@gmail.com [libc++][ranges] Applied `[[nodiscard]]` to `reverse_view` (#205186)
2026-06-23 hghristov.rmm@gmail.com [libc++][ranges] Backport P2711R1: Making multi-param constructors of views explicit (#190513)
2026-06-23 godexsoft@gmail.com [libc++]  P3798R1: The unexpected in std::expected (#204826)
2026-06-22 hghristov.rmm@gmail.com [libc++][random] Applied `[[nodiscard]]` to `<random>` (#204970)
2026-06-22 roche@httrack.com [libc++] std::abs support for _BitInt(N) and __int128 (#196532)
2026-06-22 yronglin777@gmail.com [libc++] Implement P4206R0 Revert string support in std::constant_wrapper (#203338)
2026-06-22 ldionne.2@gmail.com [libc++][lnt] Allow retaining build artifacts in run-benchbot (#205146)
2026-06-20 de34@live.cn [libc++][test] Rewrite tests for `std::byte` (#204116)
2026-06-19 hghristov.rmm@gmail.com [libc++][byte] Apply [[nodiscard]] to std::byte (#204674)
2026-06-19 aokblast@FreeBSD.org [libcxx] Make std::pair pretty-printer ABI-independent (#201768)
2026-06-19 nikolasklauser@berlin.de [libc++] Default the allocator argument for most string constructors (#169901)
2026-06-19 tikuta@google.com [libc++] Add a missing include in string.h (#135134)
2026-06-19 vinay_deshmukh@outlook.com [libc++] Make std::multimap constexpr as part of P3372R3 (#161901)
2026-06-19 xavier.roche@algolia.com [libc++][test] Migrate _BitInt probe to __BITINT_MAXWIDTH__ and fix latent test bugs (#203876)
2026-06-18 eiytoq@outlook.com [libc++][mdspan][test] Correct `mapping::operator()` constraint tests (#201061)
2026-06-18 hui.xie1990@gmail.com [libc++] Add missing constant_wrapper in the std module (#202038)
2026-06-18 neuronspectrelin@gmail.com [libc++] Restore release note dropped during rebase of #196495 (#204435)
2026-06-18 ldionne.2@gmail.com [libc++] Add Github issue links in Brno-voted papers (#204579)
2026-06-18 ldionne.2@gmail.com [libc++] Use public os_sync API instead of private __ulock on newer Apple platforms (#202519)
2026-06-17 ldionne.2@gmail.com [libc++] Create issues in batch in libcxx/utils/conformance (#204428)
2026-06-17 ldionne.2@gmail.com [libc++] Document post-WG21-meeting conformance update procedure (#204357)
2026-06-17 ldionne.2@gmail.com [libc++] Add WG21 issues and papers voted in Brno (#204191)
2026-06-17 prabhukr@google.com [libcxx] Configuration option to lower deque block size (#198348)
2026-06-16 hghristov.rmm@gmail.com [libc++][numeric] Applied `[[nodiscard]]` to `<numeric>` (#202770)
2026-06-16 ych@meta.com [libc++] Strengthen optional value constructor noexcept (#202765)
2026-06-16 hima130602@gmail.com [AIX][libc++] Fix sized_delete.pass.cpp for AIX by adding -fsized-deallocation flag (#199366)
2026-06-15 ldionne.2@gmail.com [libc++] Enable header tests under all configurations (#202543)
2026-06-15 10316270+k3DW@users.noreply.github.com [libc++] Make the body of println(FILE*) dependent on the template parameter to avoid template instantiation (#200996)
2026-06-14 wtranviet@proton.me [libc++][NFC] Simplify `optional<T>` and `optional<T&>` a bit (#203665)
2026-06-13 aidengrossman@google.com [libcxx] Do not mark mkstemp tests xfail for libc (#203681)
2026-06-13 de34@live.cn [libc++] LWG3767: `codecvt<charN_t, char8_t, mbstate_t>` incorrectly added to locale (#201749)
2026-06-13 wtranviet@proton.me [libc++] Fix bug where `optional<T&>` couldn't be constructed from `transform()` (#203462)
2026-06-13 de34@live.cn [libc++] P3369R0: constexpr for `uninitialized_default_construct` (#200163)
2026-06-11 wtranviet@proton.me [libc++] Reimplement `optional<T&>` as a partial specialization (#201983)
2026-06-11 ldionne.2@gmail.com [libc++] Hoist <compare> outside the threads guard in <thread> (#202535)
2026-06-10 nikolasklauser@berlin.de [libc++] Remove _Lazy (#202303)
2026-06-10 nikolasklauser@berlin.de [libc++] Make __is_less_than_compatable a variable template (#202525)
2026-06-10 ldionne.2@gmail.com [libc++] Fill in Apple availability for LLVM 21 (#202347)
2026-06-10 nikolasklauser@berlin.de [libc++] Assume that __array_rank is provided by the compiler (#202511)
2026-06-10 nikita.taranov@clickhouse.com [libc++] Fix exception safety of `__hash_table::__copy_construct` (avoid memory leak) (#201452)
2026-06-09 neuronspectrelin@gmail.com [libcxx] Enrich message for std::bad_variant_access exception (#196495)
2026-06-09 hghristov.rmm@gmail.com [libc++][vector] Test `[[nodiscard]]` applied to `vector::iterator` (#202262)
2026-06-09 hghristov.rmm@gmail.com [libc++][vector] Apply `[[nodiscard]]` to `vector<bool>::iterator` (#202265)
2026-06-09 de34@live.cn [libc++][format] Propagate `m` when formatting range elements (#94562)
2026-06-09 nikolasklauser@berlin.de [libc++] Simplify some meta programming in <variant> (#201538)
2026-06-09 nikolasklauser@berlin.de [libc++] Make __can_dynamic_cast a variable template (#202297)
2026-06-09 79003240+Himadhith@users.noreply.github.com [AIX][libc++] Mark offset_range test UNSUPPORTED on 32-bit AIX due to 32-bit off_t (#200861)
2026-06-09 hehiralbi@gmail.com [libc++] Finish converting __wrap_iter::operator<,== to C++20 (#193287)
2026-06-09 eiytoq@outlook.com [libc++][span][test] Various cleanups for <span> tests (#202319)
2026-06-09 aidengrossman@google.com [libcxx] Bump Github runner image version (#202470)
2026-06-08 nikolasklauser@berlin.de [libc++] Remove <atomic> includes from <stop_token> (#201710)
2026-06-07 hghristov.rmm@gmail.com [libc++][string_view] Test [[nodiscard]] applied to `basic_string_view::const_iterator` (#202203)
2026-06-07 hghristov.rmm@gmail.com [libc++][string] Test [[nodiscard]] applied to `basic_string::iterator` (#202202)
2026-06-07 hghristov.rmm@gmail.com [libc++][span] Test `[[nodiscard]]` applied to `span::iterator` (#202068)
2026-06-07 hghristov.rmm@gmail.com [libc++][array] Test `[[nodicard]]`  with `array::const_iterator` (#202070)
2026-06-06 nikolasklauser@berlin.de [libc++] Assume that <atomic> is available (#199674)
2026-06-05 nikolasklauser@berlin.de [libc++][NFC] Simplify duration comparisons a bit (#201788)
2026-06-05 nikolasklauser@berlin.de [libc++] Drop transitive includes by default (#195509)
2026-06-04 nikolasklauser@berlin.de [libc++] Remove ios_base::__xindex_ from the ABI (#198994)
2026-06-04 ldionne.2@gmail.com [libc++] Suppress deprecation warning around wstring_convert::to_bytes (#201633)
2026-06-04 ldionne.2@gmail.com [libc++] Fix constraint recursion in std::expected's operator== (#201455)
2026-06-04 nikolasklauser@berlin.de [libc++] Simplify unique_ptr constructor SFINAE (#201305)

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using the controls here:
https://autoroll.skia.org/r/libcxx-chromium
Please CC hans@chromium.org,thakis@chromium.org on the revert to ensure that a human
is aware of the problem.

To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: hans@chromium.org,thakis@chromium.org
Bug: 534049474, 503250165, 534283300
Binary-Size: See commit description.
Fuchsia-Binary-Size: See commit description.
Change-Id: I625accfc3537ed0ff4f8a55fbc92b561d17ea1a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/8109897
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Liza Burakova <liza@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1665653}
NOKEYCHECK=True
GitOrigin-RevId: 7476014c08aaeae8cadbf10b4bcbddbd01f09e19