Reduce header complexity

- Remove most __ASSEMBLER__ __LINKER__ ifdefs
- Rename libc/intrin/bits.h to libc/serialize.h
- Block pthread cancelation in fchmodat() polyfill
- Remove `clang-format off` statements in third_party

third_party/libcxx/.clang-format

@@ -1,13 +0,0 @@
-BasedOnStyle: LLVM
-
----
-Language: Cpp
-Standard: Cpp03
-
-AlwaysBreakTemplateDeclarations: true
-PointerAlignment: Left
-
-# Disable formatting options which may break tests.
-SortIncludes: false
-ReflowComments: false
----

third_party/libcxx/__sso_allocator

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/__std_stream

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/algorithm.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===----------------------- algorithm.cpp --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/any

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===------------------------------ any -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/atomic

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- atomic -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/ccomplex

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- ccomplex ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/cfenv

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===---------------------------- cfenv -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/cfloat

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- cfloat -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/chrono.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- chrono.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/cinttypes

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- cinttypes --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/ciso646

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- ciso646 ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/clocale

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- clocale ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/codecvt

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===-------------------------- codecvt -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/compare

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===-------------------------- compare -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/complex

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- complex ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/condition_variable

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===---------------------- condition_variable ----------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/condition_variable.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===-------------------- condition_variable.cpp --------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/condition_variable_destructor.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===---------------- condition_variable_destructor.cpp ------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/csetjmp

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- csetjmp ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/csignal

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- csignal ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/cstdbool

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- cstdbool ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/ctgmath

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===-------------------------- ctgmath -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/directory_iterator.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------ directory_iterator.cpp ----------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/execution

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===------------------------- execution ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/experimental/__config

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- __config ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/filesystem

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- filesystem -------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/filesystem_common.hh

@@ -1,4 +1,3 @@
-// clang-format off
 //===----------------------------------------------------------------------===////
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/forward_list

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===----------------------- forward_list ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/fstream

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===------------------------- fstream ------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/functional.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===----------------------- functional.cpp -------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/future

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- future -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/future.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- future.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/hash.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===-------------------------- hash.cpp ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/include/atomic_support.hh

@@ -1,4 +1,3 @@
-// clang-format off
 //===----------------------------------------------------------------------===////
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/include/config_elast.hh

@@ -1,4 +1,3 @@
-// clang-format off
 //===----------------------- config_elast.h -------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/iomanip

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- iomanip ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/ios.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===-------------------------- ios.cpp -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/iostream

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- iostream ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/iostream.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------ iostream.cpp --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/locale1.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- locale.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/locale2.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- locale.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/locale3.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- locale.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/locale4.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- locale.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/memory.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------ memory.cpp ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/mutex

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- mutex ------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/mutex.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- mutex.cpp ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/operations.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===--------------------- filesystem/ops.cpp -----------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/optional.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------ optional.cpp --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/regex

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- regex ------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/regex.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===-------------------------- regex.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/scoped_allocator

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===-------------------------- scoped_allocator --------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/shared_mutex

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===------------------------ shared_mutex --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/shared_mutex.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===---------------------- shared_mutex.cpp ------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/span

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===------------------------------ span ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/stack

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===---------------------------- stack -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/string.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- string.cpp ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/strstream

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- strstream --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/strstream.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------ strstream.cpp -------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/thread

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===--------------------------- thread -----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/thread.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------- thread.cpp----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/typeindex

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===-------------------------- typeindex ---------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/valarray

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===-------------------------- valarray ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/valarray.cc

@@ -1,4 +1,3 @@
-// clang-format off
 //===------------------------ valarray.cpp --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

third_party/libcxx/variant

@@ -1,5 +1,4 @@
 // -*- C++ -*-
-// clang-format off
 //===------------------------------ variant -------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.