vendor/libc++/libc++-trunk-r291015vendor/libc++/libc++-trunk-r291012

15 files changed, 274 insertions, 181 deletions

diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
index 7b574353193d..1c6790ab4652 100644
--- a/include/CMakeLists.txt
+++ b/include/CMakeLists.txt
@@ -28,15 +28,13 @@ if (LIBCXX_INSTALL_HEADERS)
   )
 
   if (LIBCXX_NEEDS_SITE_CONFIG)
-    set(UNIX_CAT cat)
-    if("${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Windows")
-      set(UNIX_CAT type)
-    endif()
     # Generate and install a custom __config header. The new header is created
     # by  prepending __config_site to the current __config header.
     add_custom_command(OUTPUT ${LIBCXX_BINARY_DIR}/__generated_config
-      COMMAND ${CMAKE_COMMAND} -E copy ${LIBCXX_BINARY_DIR}/__config_site ${LIBCXX_BINARY_DIR}/__generated_config
-      COMMAND ${UNIX_CAT} ${LIBCXX_SOURCE_DIR}/include/__config >> ${LIBCXX_BINARY_DIR}/__generated_config
+      COMMAND ${PYTHON_EXECUTABLE} ${LIBCXX_SOURCE_DIR}/utils/cat_files.py
+        ${LIBCXX_BINARY_DIR}/__config_site
+        ${LIBCXX_SOURCE_DIR}/include/__config
+        -o ${LIBCXX_BINARY_DIR}/__generated_config
       DEPENDS ${LIBCXX_SOURCE_DIR}/include/__config
               ${LIBCXX_BINARY_DIR}/__config_site
     )
diff --git a/include/__config b/include/__config
index 321e71778228..269d8635d96a 100644
--- a/include/__config
+++ b/include/__config
@@ -53,6 +53,10 @@
 // of nullptr_t. This option is ABI incompatible with GCC in C++03 mode.
 #define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR
 #elif _LIBCPP_ABI_VERSION == 1
+#if !defined(_WIN32)
+// Enable compiling a definition of error_category() into the libc++ dylib.
+#define _LIBCPP_DEPRECATED_ABI_EXTERNAL_ERROR_CATEGORY_CONSTRUCTOR
+#endif
 // Feature macros for disabling pre ABI v1 features. All of these options
 // are deprecated.
 #if defined(__FreeBSD__)
@@ -150,11 +154,13 @@
 # define _LIBCPP_HAS_QUICK_EXIT
 #endif  // __NetBSD__
 
-#ifdef _WIN32
+#if defined(_WIN32)
+#  define _LIBCPP_WIN32API      1
 #  define _LIBCPP_LITTLE_ENDIAN 1
 #  define _LIBCPP_BIG_ENDIAN    0
+#  define _LIBCPP_SHORT_WCHAR   1
 // Compiler intrinsics (MSVC)
-#if defined(_MSC_VER) && _MSC_VER >= 1400
+#  if defined(_MSC_VER) && _MSC_VER >= 1400
 #    define _LIBCPP_HAS_IS_BASE_OF
 #  endif
 #  if defined(_MSC_VER) && !defined(__clang__)
@@ -163,11 +169,14 @@
 #    define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
 #    define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x))
 #  endif
-#  // If mingw not explicitly detected, assume using MS C runtime only.
+// If mingw not explicitly detected, assume using MS C runtime only.
 #  ifndef __MINGW32__
 #    define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
 #  endif
-#endif  // _WIN32
+#  if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
+#    define _LIBCPP_HAS_BITSCAN64
+#  endif
+#endif // defined(_WIN32)
 
 #ifdef __sun__
 # include <sys/isa_defs.h>
@@ -191,7 +200,7 @@
   // including accesses to the special files under /dev. C++11's
   // std::random_device is instead exposed through a NaCl syscall.
 # define _LIBCPP_USING_NACL_RANDOM
-#elif defined(_WIN32)
+#elif defined(_LIBCPP_WIN32API)
 # define _LIBCPP_USING_WIN32_RANDOM
 #else
 # define _LIBCPP_USING_DEV_RANDOM
@@ -466,7 +475,9 @@ using namespace _LIBCPP_NAMESPACE __attribute__((__strong__));
 #define _LIBCPP_HAS_NO_CONSTEXPR
 #define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
 #define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
+#if _MSC_VER <= 1800
 #define _LIBCPP_HAS_NO_UNICODE_CHARS
+#endif
 #define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 #define _LIBCPP_HAS_NO_NOEXCEPT
 #define __alignof__ __alignof
@@ -516,8 +527,15 @@ namespace std {
 
 #endif // __clang__ || __GNUC__ || _MSC_VER || __IBMCPP__
 
+#if defined(__ELF__)
+#define _LIBCPP_OBJECT_FORMAT_ELF   1
+#elif defined(__MACH__)
+#define _LIBCPP_OBJECT_FORMAT_MACHO 1
+#else
+#define _LIBCPP_OBJECT_FORMAT_COFF  1
+#endif
 
-#ifdef _WIN32
+#if defined(_LIBCPP_OBJECT_FORMAT_COFF)
 #if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
 # define _LIBCPP_DLL_VIS
 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
@@ -542,6 +560,7 @@ namespace std {
 #define _LIBCPP_TYPE_VIS_ONLY
 #define _LIBCPP_FUNC_VIS_ONLY
 #define _LIBCPP_ENUM_VIS
+
 #if defined(_LIBCPP_MSVC)
 # define _LIBCPP_INLINE_VISIBILITY __forceinline
 # define _LIBCPP_ALWAYS_INLINE     __forceinline
@@ -551,7 +570,7 @@ namespace std {
 # define _LIBCPP_ALWAYS_INLINE     __attribute__ ((__always_inline__))
 # define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__ ((__always_inline__))
 #endif
-#endif // _WIN32
+#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
 
 #ifndef _LIBCPP_HIDDEN
 #if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
@@ -727,7 +746,7 @@ template <unsigned> struct __static_assert_check {};
 #define _NOALIAS
 #endif
 
-#if __has_feature(cxx_explicit_conversions) || defined(__IBMCPP__) || \
+#if __has_extension(cxx_explicit_conversions) || defined(__IBMCPP__) || \
     (!defined(_LIBCPP_CXX03_LANG) && defined(__GNUC__)) // All supported GCC versions
 #   define _LIBCPP_EXPLICIT explicit
 #else
@@ -774,14 +793,14 @@ template <unsigned> struct __static_assert_check {};
 #define _LIBCPP_NONUNIQUE_RTTI_BIT (1ULL << 63)
 #endif
 
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_WIN32) || \
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT) ||   \
     defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__)
 #define _LIBCPP_LOCALE__L_EXTENSIONS 1
 #endif
 
 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 // Most unix variants have catopen.  These are the specific ones that don't.
-#if !defined(_WIN32) && !defined(__BIONIC__) && !defined(_NEWLIB_VERSION)
+#if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION)
 #define _LIBCPP_HAS_CATOPEN 1
 #endif
 #endif
@@ -955,7 +974,7 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
-#if defined(_WIN32) || defined(_NEWLIB_VERSION)
+#if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION)
 #define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS
 #endif
 #endif
diff --git a/include/__locale b/include/__locale
index 535ee165f652..3f29bc5e9941 100644
--- a/include/__locale
+++ b/include/__locale
@@ -342,7 +342,7 @@ public:
     static const mask punct  = _ISpunct;
     static const mask xdigit = _ISxdigit;
     static const mask blank  = _ISblank;
-#elif defined(_WIN32)
+#elif defined(_LIBCPP_MSVCRT)
     typedef unsigned short mask;
     static const mask space  = _SPACE;
     static const mask print  = _BLANK|_PUNCT|_ALPHA|_DIGIT;
diff --git a/include/__threading_support b/include/__threading_support
index 36f1701f178c..b1eaf25ae8a4 100644
--- a/include/__threading_support
+++ b/include/__threading_support
@@ -28,11 +28,26 @@
 #endif
 
 #if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) && \
+    !__libcpp_has_include(<__external_threading>)
+// If the <__external_threading> header is absent, build libc++ against a
+// pthread-oriented thread api but leave out its implementation. This setup
+// allows building+testing of an externally-threaded library variant (on any
+// platform that supports pthreads). Here, an 'externally-threaded' library
+// variant is one where the implementation of the libc++ thread api is provided
+// as a separate library.
+#define _LIBCPP_HAS_THREAD_API_EXTERNAL_PTHREAD
+#endif
+
+#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) && \
     __libcpp_has_include(<__external_threading>)
 #include <__external_threading>
 #else
+
+#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || \
+    defined(_LIBCPP_HAS_THREAD_API_EXTERNAL_PTHREAD)
 #include <pthread.h>
 #include <sched.h>
+#endif
 
 #if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
 #define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_FUNC_VIS
@@ -42,200 +57,258 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || \
+    defined(_LIBCPP_HAS_THREAD_API_EXTERNAL_PTHREAD)
 // Mutex
 typedef pthread_mutex_t __libcpp_mutex_t;
 #define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
 
+// Condition Variable
+typedef pthread_cond_t __libcpp_condvar_t;
+#define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER
+
+// Execute once
+typedef pthread_once_t __libcpp_exec_once_flag;
+#define _LIBCPP_EXEC_ONCE_INITIALIZER PTHREAD_ONCE_INIT
+
+// Thread id
+typedef pthread_t __libcpp_thread_id;
+
+// Thread
+typedef pthread_t __libcpp_thread_t;
+
+// Thrad Local Storage
+typedef pthread_key_t __libcpp_tls_key;
+#endif
+
+// Mutex
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_recursive_mutex_init(__libcpp_mutex_t* __m);
+int __libcpp_recursive_mutex_init(__libcpp_mutex_t *__m);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_mutex_lock(__libcpp_mutex_t* __m);
+int __libcpp_mutex_lock(__libcpp_mutex_t *__m);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_mutex_trylock(__libcpp_mutex_t* __m);
+int __libcpp_mutex_trylock(__libcpp_mutex_t *__m);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_mutex_unlock(__libcpp_mutex_t* __m);
+int __libcpp_mutex_unlock(__libcpp_mutex_t *__m);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_mutex_destroy(__libcpp_mutex_t* __m);
+int __libcpp_mutex_destroy(__libcpp_mutex_t *__m);
 
 // Condition variable
-typedef pthread_cond_t __libcpp_condvar_t;
-#define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_signal(__libcpp_condvar_t* __cv);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_condvar_timedwait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m, timespec* __ts);
+int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
+                               timespec *__ts);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv);
 
+// Execute once
+_LIBCPP_THREAD_ABI_VISIBILITY
+int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
+                          void (*init_routine)(void));
+
 // Thread id
-typedef pthread_t __libcpp_thread_id;
+#if defined(__APPLE__) && !defined(__arm__)
+_LIBCPP_THREAD_ABI_VISIBILITY
+mach_port_t __libcpp_thread_get_port();
+#endif
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2);
 
 // Thread
-typedef pthread_t __libcpp_thread_t;
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_thread_create(__libcpp_thread_t* __t, void* (*__func)(void*), void* __arg);
+int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
+                           void *__arg);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 __libcpp_thread_id __libcpp_thread_get_current_id();
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t* __t);
+__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_thread_join(__libcpp_thread_t* __t);
+int __libcpp_thread_join(__libcpp_thread_t *__t);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_thread_detach(__libcpp_thread_t* __t);
+int __libcpp_thread_detach(__libcpp_thread_t *__t);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
 void __libcpp_thread_yield();
 
 // Thread local storage
-typedef pthread_key_t __libcpp_tls_key;
 _LIBCPP_THREAD_ABI_VISIBILITY
-int __libcpp_tls_create(__libcpp_tls_key* __key, void (*__at_exit)(void*));
+int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *));
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-void* __libcpp_tls_get(__libcpp_tls_key __key);
+void *__libcpp_tls_get(__libcpp_tls_key __key);
+
 _LIBCPP_THREAD_ABI_VISIBILITY
-void __libcpp_tls_set(__libcpp_tls_key __key, void* __p);
+int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);
 
-#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || defined(_LIBCPP_BUILDING_EXTERNAL_THREADS)
+#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || \
+    defined(_LIBCPP_BUILDING_THREAD_API_EXTERNAL_PTHREAD)
 
-int __libcpp_recursive_mutex_init(__libcpp_mutex_t* __m)
+int __libcpp_recursive_mutex_init(__libcpp_mutex_t *__m)
 {
-    pthread_mutexattr_t attr;
-    int __ec = pthread_mutexattr_init(&attr);
-    if (__ec) return __ec;
-    __ec = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
-    if (__ec)
-    {
-        pthread_mutexattr_destroy(&attr);
-        return __ec;
-    }
-    __ec = pthread_mutex_init(__m, &attr);
-    if (__ec)
-    {
-        pthread_mutexattr_destroy(&attr);
-        return __ec;
-    }
-    __ec = pthread_mutexattr_destroy(&attr);
-    if (__ec)
-    {
-        pthread_mutex_destroy(__m);
-        return __ec;
-    }
-    return 0;
+  pthread_mutexattr_t attr;
+  int __ec = pthread_mutexattr_init(&attr);
+  if (__ec)
+    return __ec;
+  __ec = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+  if (__ec) {
+    pthread_mutexattr_destroy(&attr);
+    return __ec;
+  }
+  __ec = pthread_mutex_init(__m, &attr);
+  if (__ec) {
+    pthread_mutexattr_destroy(&attr);
+    return __ec;
+  }
+  __ec = pthread_mutexattr_destroy(&attr);
+  if (__ec) {
+    pthread_mutex_destroy(__m);
+    return __ec;
+  }
+  return 0;
 }
 
-int __libcpp_mutex_lock(__libcpp_mutex_t* __m)
+int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
 {
-    return pthread_mutex_lock(__m);
+  return pthread_mutex_lock(__m);
 }
 
-int __libcpp_mutex_trylock(__libcpp_mutex_t* __m)
+int __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
 {
-    return pthread_mutex_trylock(__m);
+  return pthread_mutex_trylock(__m);
 }
 
-int __libcpp_mutex_unlock(__libcpp_mutex_t* __m)
+int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
 {
-    return pthread_mutex_unlock(__m);
+  return pthread_mutex_unlock(__m);
 }
 
-int __libcpp_mutex_destroy(__libcpp_mutex_t* __m)
+int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
 {
-    return pthread_mutex_destroy(__m);
+  return pthread_mutex_destroy(__m);
 }
 
-// Condition variable
-int __libcpp_condvar_signal(__libcpp_condvar_t* __cv)
+// Condition Variable
+int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
 {
-    return pthread_cond_signal(__cv);
+  return pthread_cond_signal(__cv);
 }
 
-int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv)
+int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
 {
-    return pthread_cond_broadcast(__cv);
+  return pthread_cond_broadcast(__cv);
 }
 
-int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m)
+int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
 {
-    return pthread_cond_wait(__cv, __m);
+  return pthread_cond_wait(__cv, __m);
 }
 
-int __libcpp_condvar_timedwait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m, timespec* __ts)
+int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
+                               timespec *__ts)
 {
-    return pthread_cond_timedwait(__cv, __m, __ts);
+  return pthread_cond_timedwait(__cv, __m, __ts);
 }
 
-int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv)
+int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
 {
-    return pthread_cond_destroy(__cv);
+  return pthread_cond_destroy(__cv);
 }
 
+// Execute once
+int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
+                          void (*init_routine)(void)) {
+  return pthread_once(flag, init_routine);
+}
+
+// Thread id
+#if defined(__APPLE__) && !defined(__arm__)
+mach_port_t __libcpp_thread_get_port() {
+    return pthread_mach_thread_np(pthread_self());
+}
+#endif
+
 // Returns non-zero if the thread ids are equal, otherwise 0
 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
 {
-    return pthread_equal(t1, t2) != 0;
+  return pthread_equal(t1, t2) != 0;
 }
 
 // Returns non-zero if t1 < t2, otherwise 0
 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
 {
-    return t1 < t2;
+  return t1 < t2;
 }
 
 // Thread
-int __libcpp_thread_create(__libcpp_thread_t* __t, void* (*__func)(void*), void* __arg)
+int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
+                           void *__arg)
 {
-    return pthread_create(__t, 0, __func, __arg);
+  return pthread_create(__t, 0, __func, __arg);
 }
 
 __libcpp_thread_id __libcpp_thread_get_current_id()
 {
-    return pthread_self();
+  return pthread_self();
 }
 
-__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t* __t)
+__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
 {
-    return *__t;
+  return *__t;
 }
 
-int __libcpp_thread_join(__libcpp_thread_t* __t)
+int __libcpp_thread_join(__libcpp_thread_t *__t)
 {
-    return pthread_join(*__t, 0);
+  return pthread_join(*__t, 0);
 }
 
-int __libcpp_thread_detach(__libcpp_thread_t* __t)
+int __libcpp_thread_detach(__libcpp_thread_t *__t)
 {
-    return pthread_detach(*__t);
+  return pthread_detach(*__t);
 }
 
 void __libcpp_thread_yield()
 {
-    sched_yield();
+  sched_yield();
 }
 
 // Thread local storage
-int __libcpp_tls_create(__libcpp_tls_key* __key, void (*__at_exit)(void*))
+int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
 {
-    return pthread_key_create(__key, __at_exit);
+  return pthread_key_create(__key, __at_exit);
 }
 
-void* __libcpp_tls_get(__libcpp_tls_key __key)
+void *__libcpp_tls_get(__libcpp_tls_key __key)
 {
-    return pthread_getspecific(__key);
+  return pthread_getspecific(__key);
 }
 
-void __libcpp_tls_set(__libcpp_tls_key __key, void* __p)
+int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
 {
-    pthread_setspecific(__key, __p);
+    return pthread_setspecific(__key, __p);
 }
 
-#endif // _LIBCPP_HAS_THREAD_API_PTHREAD || _LIBCPP_BUILDING_EXTERNAL_THREADS
+#endif // _LIBCPP_HAS_THREAD_API_PTHREAD
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/include/__tuple b/include/__tuple
index 775d7340b54d..7aad08163662 100644
--- a/include/__tuple
+++ b/include/__tuple
@@ -22,19 +22,32 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_size {};
+template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_size;
+
+struct __empty_tuple_size_base {};
+
+template <class _Tp, class = void>
+struct __tuple_size_base_type {
+  typedef __empty_tuple_size_base type;
+};
+
+template <class _Tp>
+struct __tuple_size_base_type<_Tp, typename __void_t<decltype(tuple_size<_Tp>::value)>::type>
+{
+  typedef integral_constant<size_t, tuple_size<_Tp>::value> type;
+};
 
 template <class _Tp>
 class _LIBCPP_TYPE_VIS_ONLY tuple_size<const _Tp>
-    : public tuple_size<_Tp> {};
+    : public __tuple_size_base_type<_Tp>::type {};
 
 template <class _Tp>
 class _LIBCPP_TYPE_VIS_ONLY tuple_size<volatile _Tp>
-    : public tuple_size<_Tp> {};
+    : public __tuple_size_base_type<_Tp>::type {};
 
 template <class _Tp>
 class _LIBCPP_TYPE_VIS_ONLY tuple_size<const volatile _Tp>
-    : public tuple_size<_Tp> {};
+    : public __tuple_size_base_type<_Tp>::type {};
 
 template <size_t _Ip, class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_element;
 
diff --git a/include/array b/include/array
index d3f8463cf664..7e205cbf8e48 100644
--- a/include/array
+++ b/include/array
@@ -149,31 +149,31 @@ struct _LIBCPP_TYPE_VIS_ONLY array
         { _VSTD::swap_ranges(__elems_, __elems_ + _Size, __a.__elems_);}
 
     // iterators:
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     iterator begin() _NOEXCEPT {return iterator(__elems_);}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator begin() const _NOEXCEPT {return const_iterator(__elems_);}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     iterator end() _NOEXCEPT {return iterator(__elems_ + _Size);}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator end() const _NOEXCEPT {return const_iterator(__elems_ + _Size);}
 
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator rbegin() const _NOEXCEPT {return const_reverse_iterator(end());}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator rend() const _NOEXCEPT {return const_reverse_iterator(begin());}
 
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator cbegin() const _NOEXCEPT {return begin();}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator cend() const _NOEXCEPT {return end();}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator crend() const _NOEXCEPT {return rend();}
 
     // capacity:
@@ -195,9 +195,9 @@ struct _LIBCPP_TYPE_VIS_ONLY array
     _LIBCPP_INLINE_VISIBILITY reference back()              {return __elems_[_Size > 0 ? _Size-1 : 0];}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference back() const  {return __elems_[_Size > 0 ? _Size-1 : 0];}
 
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     value_type* data() _NOEXCEPT {return __elems_;}
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const value_type* data() const _NOEXCEPT {return __elems_;}
 };
 
diff --git a/include/experimental/string_view b/include/experimental/string_view
index a62fe6e95a10..ccc886ea98f7 100644
--- a/include/experimental/string_view
+++ b/include/experimental/string_view
@@ -340,7 +340,12 @@ _LIBCPP_BEGIN_NAMESPACE_LFTS
         // [string.view.ops], string operations:
         template<class _Allocator>
         _LIBCPP_INLINE_VISIBILITY
-        _LIBCPP_EXPLICIT operator basic_string<_CharT, _Traits, _Allocator>() const
+        // Clang's extended C++11 explict conversions don't work with
+        // string_view in C++03.
+#ifndef _LIBCPP_CXX03_LANG
+        _LIBCPP_EXPLICIT
+#endif
+        operator basic_string<_CharT, _Traits, _Allocator>() const
         { return basic_string<_CharT, _Traits, _Allocator>( begin(), end()); }
 
         template<class _Allocator = allocator<_CharT> >
diff --git a/include/ios b/include/ios
index fb8f88dddab2..ea83822ac169 100644
--- a/include/ios
+++ b/include/ios
@@ -572,13 +572,6 @@ ios_base::exceptions(iostate __iostate)
     clear(__rdstate_);
 }
 
-#if defined(_LIBCPP_CXX03_LANG)
-struct _LIBCPP_TYPE_VIS_ONLY __cxx03_bool {
-  typedef void (__cxx03_bool::*__bool_type)();
-  void __true_value() {}
-};
-#endif
-
 template <class _CharT, class _Traits>
 class _LIBCPP_TYPE_VIS_ONLY basic_ios
     : public ios_base
@@ -592,18 +585,8 @@ public:
     typedef typename traits_type::pos_type pos_type;
     typedef typename traits_type::off_type off_type;
 
-  // __true_value will generate undefined references when linking unless
-  // we give it internal linkage.
-
-#if defined(_LIBCPP_CXX03_LANG)
-    _LIBCPP_ALWAYS_INLINE
-    operator __cxx03_bool::__bool_type() const {
-        return !fail() ? &__cxx03_bool::__true_value : nullptr;
-    }
-#else
     _LIBCPP_ALWAYS_INLINE
     _LIBCPP_EXPLICIT operator bool() const {return !fail();}
-#endif
 
     _LIBCPP_ALWAYS_INLINE bool operator!() const    {return  fail();}
     _LIBCPP_ALWAYS_INLINE iostate rdstate() const   {return ios_base::rdstate();}
diff --git a/include/iterator b/include/iterator
index ba9a83b9e5e5..797ec5332e39 100644
--- a/include/iterator
+++ b/include/iterator
@@ -378,25 +378,25 @@ public:
     bool failed() const noexcept;
 };
 
-template <class C> auto begin(C& c) -> decltype(c.begin());
-template <class C> auto begin(const C& c) -> decltype(c.begin());
-template <class C> auto end(C& c) -> decltype(c.end());
-template <class C> auto end(const C& c) -> decltype(c.end());
-template <class T, size_t N> T* begin(T (&array)[N]);
-template <class T, size_t N> T* end(T (&array)[N]);
-
-template <class C> auto cbegin(const C& c) -> decltype(std::begin(c));        // C++14
-template <class C> auto cend(const C& c) -> decltype(std::end(c));            // C++14
-template <class C> auto rbegin(C& c) -> decltype(c.rbegin());                 // C++14
-template <class C> auto rbegin(const C& c) -> decltype(c.rbegin());           // C++14
-template <class C> auto rend(C& c) -> decltype(c.rend());                     // C++14
-template <class C> auto rend(const C& c) -> decltype(c.rend());               // C++14
-template <class E> reverse_iterator<const E*> rbegin(initializer_list<E> il); // C++14
-template <class E> reverse_iterator<const E*> rend(initializer_list<E> il);   // C++14
-template <class T, size_t N> reverse_iterator<T*> rbegin(T (&array)[N]);      // C++14
-template <class T, size_t N> reverse_iterator<T*> rend(T (&array)[N]);        // C++14
-template <class C> auto crbegin(const C& c) -> decltype(std::rbegin(c));      // C++14
-template <class C> auto crend(const C& c) -> decltype(std::rend(c));          // C++14
+template <class C> constexpr auto begin(C& c) -> decltype(c.begin());
+template <class C> constexpr auto begin(const C& c) -> decltype(c.begin());
+template <class C> constexpr auto end(C& c) -> decltype(c.end());
+template <class C> constexpr auto end(const C& c) -> decltype(c.end());
+template <class T, size_t N> constexpr T* begin(T (&array)[N]);
+template <class T, size_t N> constexpr T* end(T (&array)[N]);
+
+template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c));        // C++14
+template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c));            // C++14
+template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin());                 // C++14
+template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin());           // C++14
+template <class C> auto constexpr rend(C& c) -> decltype(c.rend());                     // C++14
+template <class C> constexpr auto rend(const C& c) -> decltype(c.rend());               // C++14
+template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14
+template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il);   // C++14
+template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]);      // C++14
+template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]);        // C++14
+template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c));      // C++14
+template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c));          // C++14
 
 // 24.8, container access:
 template <class C> constexpr auto size(const C& c) -> decltype(c.size());         // C++17
@@ -1616,7 +1616,7 @@ end(_Tp (&__array)[_Np])
 #if !defined(_LIBCPP_CXX03_LANG)
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto
 begin(_Cp& __c) -> decltype(__c.begin())
 {
@@ -1624,7 +1624,7 @@ begin(_Cp& __c) -> decltype(__c.begin())
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto
 begin(const _Cp& __c) -> decltype(__c.begin())
 {
@@ -1632,7 +1632,7 @@ begin(const _Cp& __c) -> decltype(__c.begin())
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto
 end(_Cp& __c) -> decltype(__c.end())
 {
@@ -1640,7 +1640,7 @@ end(_Cp& __c) -> decltype(__c.end())
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto
 end(const _Cp& __c) -> decltype(__c.end())
 {
@@ -1650,28 +1650,28 @@ end(const _Cp& __c) -> decltype(__c.end())
 #if _LIBCPP_STD_VER > 11
 
 template <class _Tp, size_t _Np>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np])
 {
     return reverse_iterator<_Tp*>(__array + _Np);
 }
 
 template <class _Tp, size_t _Np>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np])
 {
     return reverse_iterator<_Tp*>(__array);
 }
 
 template <class _Ep>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il)
 {
     return reverse_iterator<const _Ep*>(__il.end());
 }
 
 template <class _Ep>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il)
 {
     return reverse_iterator<const _Ep*>(__il.begin());
@@ -1692,42 +1692,42 @@ auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c))
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto rbegin(_Cp& __c) -> decltype(__c.rbegin())
 {
     return __c.rbegin();
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin())
 {
     return __c.rbegin();
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto rend(_Cp& __c) -> decltype(__c.rend())
 {
     return __c.rend();
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto rend(const _Cp& __c) -> decltype(__c.rend())
 {
     return __c.rend();
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c))
 {
     return _VSTD::rbegin(__c);
 }
 
 template <class _Cp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
 auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c))
 {
     return _VSTD::rend(__c);
diff --git a/include/new b/include/new
index 6b432f231bf6..442e113665dd 100644
--- a/include/new
+++ b/include/new
@@ -162,7 +162,7 @@ _LIBCPP_FUNC_VIS new_handler get_new_handler() _NOEXCEPT;
 
 }  // std
 
-#if !__has_feature(cxx_noexcept)
+#if defined(_LIBCPP_CXX03_LANG)
 #define _THROW_BAD_ALLOC throw(std::bad_alloc)
 #else
 #define _THROW_BAD_ALLOC
diff --git a/include/support/win32/locale_win32.h b/include/support/win32/locale_win32.h
index 0f5527e570ab..ebf5bda740a5 100644
--- a/include/support/win32/locale_win32.h
+++ b/include/support/win32/locale_win32.h
@@ -11,8 +11,12 @@
 #ifndef _LIBCPP_SUPPORT_WIN32_LOCALE_WIN32_H
 #define _LIBCPP_SUPPORT_WIN32_LOCALE_WIN32_H
 
+#include <crtversion.h>
+
+#if _VC_CRT_MAJOR_VERSION < 14
 // ctype mask table defined in msvcrt.dll
-extern "C" unsigned short  __declspec(dllimport) _ctype[];
+extern "C" unsigned short __declspec(dllimport) _ctype[];
+#endif
 
 #include "support/win32/support.h"
 #include "support/win32/locale_mgmt_win32.h"
diff --git a/include/support/win32/support.h b/include/support/win32/support.h
index 6a5763b5e49b..17ee1980a643 100644
--- a/include/support/win32/support.h
+++ b/include/support/win32/support.h
@@ -110,10 +110,11 @@ _LIBCPP_ALWAYS_INLINE int __builtin_ctzll(unsigned long long mask)
   unsigned long where;
 // Search from LSB to MSB for first set bit.
 // Returns zero if no set bit is found.
-#if defined(_WIN64)
+#if defined(_LIBCPP_HAS_BITSCAN64)
+    (defined(_M_AMD64) || defined(__x86_64__))
   if (_BitScanForward64(&where, mask))
     return static_cast<int>(where);
-#elif defined(_WIN32)
+#else
   // Win32 doesn't have _BitScanForward64 so emulate it with two 32 bit calls.
   // Scan the Low Word.
   if (_BitScanForward(&where, static_cast<unsigned long>(mask)))
@@ -121,8 +122,6 @@ _LIBCPP_ALWAYS_INLINE int __builtin_ctzll(unsigned long long mask)
   // Scan the High Word.
   if (_BitScanForward(&where, static_cast<unsigned long>(mask >> 32)))
     return static_cast<int>(where + 32); // Create a bit offset from the LSB.
-#else
-#error "Implementation of __builtin_ctzll required"
 #endif
   return 64;
 }
@@ -152,10 +151,10 @@ _LIBCPP_ALWAYS_INLINE int __builtin_clzll(unsigned long long mask)
   unsigned long where;
 // BitScanReverse scans from MSB to LSB for first set bit.
 // Returns 0 if no set bit is found.
-#if defined(_WIN64)
+#if defined(_LIBCPP_HAS_BITSCAN64)
   if (_BitScanReverse64(&where, mask))
     return static_cast<int>(63 - where);
-#elif defined(_WIN32)
+#else
   // Scan the high 32 bits.
   if (_BitScanReverse(&where, static_cast<unsigned long>(mask >> 32)))
     return static_cast<int>(63 -
@@ -163,8 +162,6 @@ _LIBCPP_ALWAYS_INLINE int __builtin_clzll(unsigned long long mask)
   // Scan the low 32 bits.
   if (_BitScanReverse(&where, static_cast<unsigned long>(mask)))
     return static_cast<int>(63 - where);
-#else
-#error "Implementation of __builtin_clzll required"
 #endif
   return 64; // Undefined Behavior.
 }
diff --git a/include/system_error b/include/system_error
index c7e73d4ab82b..58040639d3ec 100644
--- a/include/system_error
+++ b/include/system_error
@@ -384,7 +384,8 @@ class _LIBCPP_TYPE_VIS error_category
 public:
     virtual ~error_category() _NOEXCEPT;
 
-#ifdef _LIBCPP_BUILDING_SYSTEM_ERROR
+#if defined(_LIBCPP_BUILDING_SYSTEM_ERROR) && \
+    defined(_LIBCPP_DEPRECATED_ABI_EXTERNAL_ERROR_CATEGORY_CONSTRUCTOR)
     error_category() _NOEXCEPT;
 #else
     _LIBCPP_ALWAYS_INLINE
diff --git a/include/tuple b/include/tuple
index 553d8e546f89..2f71cce74139 100644
--- a/include/tuple
+++ b/include/tuple
@@ -84,7 +84,7 @@ template <class T, class Tuple>
   constexpr T make_from_tuple(Tuple&& t); // C++17
 
 // 20.4.1.4, tuple helper classes:
-template <class T> class tuple_size;
+template <class T> class tuple_size; // undefined
 template <class... T> class tuple_size<tuple<T...>>;
 template <class T>
  constexpr size_t tuple_size_v = tuple_size<T>::value; // C++17
diff --git a/include/type_traits b/include/type_traits
index e2b537799dcc..db9c1d11c983 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -1681,9 +1681,9 @@ _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800);
 _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000);
 _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000);
 // PE/COFF does not support alignment beyond 8192 (=0x2000)
-#if !defined(_WIN32)
+#if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
 _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000);
-#endif // !_WIN32
+#endif // !defined(_LIBCPP_OBJECT_FORMAT_COFF)
 
 #undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION