[all-commits] [llvm/llvm-project] ce5b2e: [libc++] Drop transitive includes by default (#195...

[Nikolas Klauser via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ce5b2e876494cb95f02d9f915081e2b8781e74d1
      https://github.com/llvm/llvm-project/commit/ce5b2e876494cb95f02d9f915081e2b8781e74d1
  Author: Nikolas Klauser <nikolasklauser at berlin.de>
  Date:   2026-06-05 (Fri, 05 Jun 2026)

  Changed paths:
    M compiler-rt/test/tsan/many_held_mutex.cpp
    M libcxx/docs/ReleaseNotes/23.rst
    M libcxx/include/__functional/function.h
    M libcxx/include/algorithm
    M libcxx/include/any
    M libcxx/include/array
    M libcxx/include/atomic
    M libcxx/include/barrier
    M libcxx/include/bit
    M libcxx/include/bitset
    M libcxx/include/charconv
    M libcxx/include/chrono
    M libcxx/include/cmath
    M libcxx/include/codecvt
    M libcxx/include/compare
    M libcxx/include/complex
    M libcxx/include/concepts
    M libcxx/include/condition_variable
    M libcxx/include/coroutine
    M libcxx/include/cwchar
    M libcxx/include/deque
    M libcxx/include/exception
    M libcxx/include/execution
    M libcxx/include/experimental/iterator
    M libcxx/include/experimental/memory
    M libcxx/include/experimental/propagate_const
    M libcxx/include/experimental/simd
    M libcxx/include/experimental/type_traits
    M libcxx/include/experimental/utility
    M libcxx/include/ext/hash_map
    M libcxx/include/ext/hash_set
    M libcxx/include/filesystem
    M libcxx/include/format
    M libcxx/include/forward_list
    M libcxx/include/fstream
    M libcxx/include/functional
    M libcxx/include/future
    M libcxx/include/initializer_list
    M libcxx/include/iomanip
    M libcxx/include/ios
    M libcxx/include/istream
    M libcxx/include/iterator
    M libcxx/include/latch
    M libcxx/include/limits
    M libcxx/include/list
    M libcxx/include/locale
    M libcxx/include/map
    M libcxx/include/memory
    M libcxx/include/memory_resource
    M libcxx/include/module.modulemap.in
    M libcxx/include/mutex
    M libcxx/include/new
    M libcxx/include/numbers
    M libcxx/include/numeric
    M libcxx/include/optional
    M libcxx/include/ostream
    M libcxx/include/queue
    M libcxx/include/random
    M libcxx/include/ranges
    M libcxx/include/ratio
    M libcxx/include/regex
    M libcxx/include/scoped_allocator
    M libcxx/include/semaphore
    M libcxx/include/set
    M libcxx/include/shared_mutex
    M libcxx/include/span
    M libcxx/include/sstream
    M libcxx/include/stack
    M libcxx/include/stdexcept
    M libcxx/include/stop_token
    M libcxx/include/streambuf
    M libcxx/include/string
    M libcxx/include/string_view
    M libcxx/include/system_error
    M libcxx/include/thread
    M libcxx/include/tuple
    M libcxx/include/typeindex
    M libcxx/include/typeinfo
    M libcxx/include/unordered_map
    M libcxx/include/unordered_set
    M libcxx/include/utility
    M libcxx/include/valarray
    M libcxx/include/variant
    M libcxx/include/vector
    M libcxx/test/libcxx/transitive_includes.gen.py
    M libcxx/test/std/utilities/function.objects/func.wrap/func.wrap.func/derive_from.pass.cpp
    M libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.const/pr40459.pass.cpp
    M lldb/test/API/commands/expression/import-std-module/shared_ptr/TestSharedPtrFromStdModule.py
    M lldb/test/API/commands/expression/import-std-module/weak_ptr/TestWeakPtrFromStdModule.py

  Log Message:
  -----------
  [libc++] Drop transitive includes by default (#195509)

This patch removes the unused transitive includes by default.
`_LIBCPP_KEEP_TRANSITIVE_INCLUDES_LLVM23` can be defined to keep the
transitive includes around for an easier transition. The macro will be
removed in LLVM 24.

This patch implements
https://discourse.llvm.org/t/rfc-remove-unused-transitive-includes-from-the-libc-headers/90157



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