Issues

• [libc++] std::stable_sort of floating-point values moves -0.0 before +0.0

  libc++
  llvm/llvm-project#238590 · Filter by author dmeoli opened on Nov 3, 2026

• [libcxx] Omit default library directives when building static libc++ on Windows

  libc++
  Unread
  llvm/llvm-project#238238·petrhosek opened Nov 3, 2026 · Updated Nov 3, 2026
  1

• [libcxx] Do not define _CRT_STDIO_ISO_WIDE_SPECIFIERS on Windows

  libc++
  Unread
  llvm/llvm-project#238233·petrhosek opened Nov 3, 2026 · Updated Nov 3, 2026
  2

• Support statically linking Clang against libc++ in MSVC mode

  clang:driverlibc++lld:COFF
  llvm/llvm-project#238229 · Filter by author petrhosek opened on Nov 3, 2026
  2

• [libc++] num_put::put slowdown after operator, change

  libc++performance
  llvm/llvm-project#238041 · Filter by author ldionne opened on Nov 2, 2026
  

• [libc++] Allow the compiler to reorder computation in reduction loops

  libc++
  Unread
  llvm/llvm-project#237918·mikekazakov opened Nov 2, 2026 · Updated Nov 2, 2026
  2

  

• [libc++][test] Forward LLVM_USE_LINKER to Lit test suites

  libc++abilibc++libunwind
  Unread
  llvm/llvm-project#237635·vitalybuka opened Oct 31, 2026 · Updated Nov 1, 2026
  1

• [libc++] Could views::drop and views::take on string_view be noexcept?

  libc++ranges
  llvm/llvm-project#237594 · Filter by author atif1996 opened on Oct 31, 2026
  1

• [libc++] ranges::set_union/set_intersection/set_difference/set_symmetric_difference apply projections to the wrong range

  libc++ranges
  llvm/llvm-project#237475 · Filter by author rarutyun opened on Oct 31, 2026
  

• [CLANG][LIBCXX][LLVM] Partial program correctness. P1494R5, P3641R0

  backend:X86clang:codegenclang:frontendlibc++llvm:analysisllvm:globaliselllvm:irllvm:SelectionDAGllvm:transforms
  Unread
  llvm/llvm-project#237335·DenisGZM opened Oct 30, 2026 · Updated Oct 31, 2026
  10

• [libc++][pstl] Statpart backend is unconditionally used when threading is enabled

  libc++
  Unread
  llvm/llvm-project#237177·mikekazakov opened Oct 30, 2026 · Updated Oct 30, 2026
  1

  

• [libcxx] Fix incorrect projections order for ranges::set_ algorithms

  libc++
  Unread
  llvm/llvm-project#237087·rarutyun opened Oct 30, 2026 · Updated Oct 31, 2026
  2

• [libc++] optimise stop_token

  libc++
  Unread
  llvm/llvm-project#236943·huixie90 opened Oct 29, 2026 · Updated Nov 1, 2026
  1

• [libc++] move android buildbot off buildkite

  infrastructurelibc++platform:android
  llvm/llvm-project#236888 · Filter by author nickdesaulniers opened on Oct 29, 2026
  2

  

• [libc++] Fix the is-long flag position of basic_string with the _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT

  libc++
  Unread
  llvm/llvm-project#236867·Himadhith opened Oct 29, 2026 · Updated Nov 2, 2026
  4

• [libc++] Implement ADL tests for std::expected

  libc++
  Unread
  llvm/llvm-project#236608·HumanThe2nd opened Oct 29, 2026 · Updated Oct 29, 2026
  2

• [libc++][NFC] Mark LWG2166 as "Nothing To Do"

  c++17libc++
  Unread
  llvm/llvm-project#236422·lknknm opened Oct 28, 2026 · Updated Nov 3, 2026
  6

• [libc++] clang-cl-no-vcruntime test configuration fails with Clang 23.x

  libc++platform:windows
  Bug

  llvm/llvm-project#236395 · Filter by author mstorsjo opened on Oct 28, 2026

• [libc++] Assert that the elements selected by a valarray subscript exist

  libc++
  Unread
  llvm/llvm-project#236120·ilyas-mallah opened Oct 27, 2026 · Updated Nov 3, 2026
  3

• [libc++] Fix shared_ptr<T[]>(Y*) rollback to use delete[] when allocation fails

  libc++
  Unread
  llvm/llvm-project#235691·tomaszlewandowskivalidas opened Oct 26, 2026 · Updated Nov 3, 2026
  14

• [libc++][docs] Introduce Experimental Implementation Status

  libc++
  Unread
  llvm/llvm-project#235526·smallp-o-p opened Oct 25, 2026 · Updated Oct 30, 2026
  6

• CI code formatter steps inconsistency in libcxx

  libc++test-suite
  llvm/llvm-project#235395 · Filter by author clin1234 opened on Oct 25, 2026
  3

• [libc++] Use clock_gettime in filesystem_clock on OpenBSD

  libc++
  Unread
  llvm/llvm-project#235292·brad0 opened Oct 24, 2026 · Updated Oct 24, 2026
  1

• [libc++] std::shared_ptr<T[]>(Y*) uses scalar delete instead of delete[] when control block allocation throws

  libc++
  Bug

  llvm/llvm-project#234974 · Filter by author slotosch opened on Oct 23, 2026
  3

• [libc++] Speed-up the reduction by up to 4X by breaking the dependency chain

  libc++
  Unread
  llvm/llvm-project#234887·mikekazakov opened Oct 23, 2026 · Updated Oct 30, 2026
  9