[libc++] Refactor the configuration macros to being always defined

libcxx/CMakeLists.txt

@@ -741,24 +741,24 @@ config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION)
 config_define(${LIBCXX_ABI_NAMESPACE} _LIBCPP_ABI_NAMESPACE)
 config_define_if(LIBCXX_ABI_FORCE_ITANIUM _LIBCPP_ABI_FORCE_ITANIUM)
 config_define_if(LIBCXX_ABI_FORCE_MICROSOFT _LIBCPP_ABI_FORCE_MICROSOFT)
-config_define_if_not(LIBCXX_ENABLE_THREADS _LIBCPP_HAS_NO_THREADS)
-config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK)
-config_define_if_not(LIBCXX_HAS_TERMINAL_AVAILABLE _LIBCPP_HAS_NO_TERMINAL)
+config_define(${LIBCXX_ENABLE_THREADS} _LIBCPP_HAS_THREADS)
+config_define(${LIBCXX_ENABLE_MONOTONIC_CLOCK} _LIBCPP_HAS_MONOTONIC_CLOCK)
+config_define(${LIBCXX_HAS_TERMINAL_AVAILABLE} _LIBCPP_HAS_TERMINAL)
 if (NOT LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION STREQUAL "default")
   config_define("${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}" _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION)
 endif()
 config_define_if(LIBCXX_HAS_PTHREAD_API _LIBCPP_HAS_THREAD_API_PTHREAD)
 config_define_if(LIBCXX_HAS_EXTERNAL_THREAD_API _LIBCPP_HAS_THREAD_API_EXTERNAL)
 config_define_if(LIBCXX_HAS_WIN32_THREAD_API _LIBCPP_HAS_THREAD_API_WIN32)
-config_define_if(LIBCXX_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC)
+config_define(${LIBCXX_HAS_MUSL_LIBC} _LIBCPP_HAS_MUSL_LIBC)
 config_define_if(LIBCXX_NO_VCRUNTIME _LIBCPP_NO_VCRUNTIME)
-config_define_if_not(LIBCXX_ENABLE_FILESYSTEM _LIBCPP_HAS_NO_FILESYSTEM)
-config_define_if_not(LIBCXX_ENABLE_RANDOM_DEVICE _LIBCPP_HAS_NO_RANDOM_DEVICE)
-config_define_if_not(LIBCXX_ENABLE_LOCALIZATION _LIBCPP_HAS_NO_LOCALIZATION)
-config_define_if_not(LIBCXX_ENABLE_UNICODE _LIBCPP_HAS_NO_UNICODE)
-config_define_if_not(LIBCXX_ENABLE_WIDE_CHARACTERS _LIBCPP_HAS_NO_WIDE_CHARACTERS)
-config_define_if_not(LIBCXX_ENABLE_TIME_ZONE_DATABASE _LIBCPP_HAS_NO_TIME_ZONE_DATABASE)
-config_define_if_not(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS)
+config_define(${LIBCXX_ENABLE_FILESYSTEM} _LIBCPP_HAS_FILESYSTEM)
+config_define(${LIBCXX_ENABLE_RANDOM_DEVICE} _LIBCPP_HAS_RANDOM_DEVICE)
+config_define(${LIBCXX_ENABLE_LOCALIZATION} _LIBCPP_HAS_LOCALIZATION)
+config_define(${LIBCXX_ENABLE_UNICODE} _LIBCPP_HAS_UNICODE)
+config_define(${LIBCXX_ENABLE_WIDE_CHARACTERS} _LIBCPP_HAS_WIDE_CHARACTERS)
+config_define(${LIBCXX_ENABLE_TIME_ZONE_DATABASE} _LIBCPP_HAS_TIME_ZONE_DATABASE)
+config_define(${LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS} _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS)
 
 if (LIBCXX_ENABLE_ASSERTIONS)
   message(DEPRECATION "LIBCXX_ENABLE_ASSERTIONS is deprecated and will be removed in LLVM 20. Please use LIBCXX_HARDENING_MODE instead.")

libcxx/docs/DesignDocs/ThreadingSupportAPI.rst

@@ -45,9 +45,9 @@ API but leaves out the implementation.
 Threading Configuration Macros
 ==============================
 
-**_LIBCPP_HAS_NO_THREADS**
-  This macro is defined when libc++ is built without threading support. It
-  should not be manually defined by the user.
+**_LIBCPP_HAS_THREADS**
+  This macro is set to 1 when libc++ is built with threading support. Otherwise
+  it is set to 0. It should not be manually defined by the user.
 
 **_LIBCPP_HAS_THREAD_API_EXTERNAL**
   This macro is defined when libc++ should use the ``<__external_threading>``

libcxx/include/__algorithm/find.h

@@ -29,7 +29,7 @@
 #include <__utility/move.h>
 #include <limits>
 
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#if _LIBCPP_HAS_WIDE_CHARACTERS
 #  include <cwchar>
 #endif
 
@@ -65,7 +65,7 @@ _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp* __find(_Tp* __first, _T
   return __last;
 }
 
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#if _LIBCPP_HAS_WIDE_CHARACTERS
 template <class _Tp,
           class _Up,
           class _Proj,
@@ -77,7 +77,7 @@ _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp* __find(_Tp* __first, _T
     return __ret;
   return __last;
 }
-#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#endif // _LIBCPP_HAS_WIDE_CHARACTERS
 
 // TODO: This should also be possible to get right with different signedness
 // cast integral types to allow vectorization

libcxx/include/__algorithm/lexicographical_compare.h

@@ -26,7 +26,7 @@
 #include <__type_traits/is_trivially_lexicographically_comparable.h>
 #include <__type_traits/is_volatile.h>
 
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#if _LIBCPP_HAS_WIDE_CHARACTERS
 #  include <cwchar>
 #endif
 
@@ -78,14 +78,14 @@ __lexicographical_compare(_Tp* __first1, _Tp* __last1, _Tp* __first2, _Tp* __las
       return __last1 - __first1 < __last2 - __first2;
     return __res < 0;
   }
-#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#  if _LIBCPP_HAS_WIDE_CHARACTERS
   else if constexpr (is_same<__remove_cv_t<_Tp>, wchar_t>::value) {
     auto __res = std::__constexpr_wmemcmp(__first1, __first2, std::min(__last1 - __first1, __last2 - __first2));
     if (__res == 0)
       return __last1 - __first1 < __last2 - __first2;
     return __res < 0;
   }
-#  endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#  endif // _LIBCPP_HAS_WIDE_CHARACTERS
   else {
     auto __res = std::mismatch(__first1, __last1, __first2, __last2);
     if (__res.second == __last2)

libcxx/include/__algorithm/sort.h

@@ -894,7 +894,7 @@ template <class _Comp, class _RandomAccessIterator>
 void __sort(_RandomAccessIterator, _RandomAccessIterator, _Comp);
 
 extern template _LIBCPP_EXPORTED_FROM_ABI void __sort<__less<char>&, char*>(char*, char*, __less<char>&);
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#if _LIBCPP_HAS_WIDE_CHARACTERS
 extern template _LIBCPP_EXPORTED_FROM_ABI void __sort<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&);
 #endif
 extern template _LIBCPP_EXPORTED_FROM_ABI void
@@ -941,7 +941,7 @@ template <class _Type>
 using __sort_is_specialized_in_library = __is_any_of<
     _Type,
     char,
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#if _LIBCPP_HAS_WIDE_CHARACTERS
     wchar_t,
 #endif
     signed char,

libcxx/include/__atomic/aliases.h

@@ -42,7 +42,7 @@ using atomic_char8_t = atomic<char8_t>;
 #endif
 using atomic_char16_t = atomic<char16_t>;
 using atomic_char32_t = atomic<char32_t>;
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#if _LIBCPP_HAS_WIDE_CHARACTERS
 using atomic_wchar_t = atomic<wchar_t>;
 #endif
 

libcxx/include/__atomic/atomic_sync.h

@@ -69,7 +69,7 @@ struct __atomic_wait_poll_impl {
   }
 };
 
-#ifndef _LIBCPP_HAS_NO_THREADS
+#if _LIBCPP_HAS_THREADS
 
 _LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __cxx_atomic_notify_one(void const volatile*) _NOEXCEPT;
 _LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __cxx_atomic_notify_all(void const volatile*) _NOEXCEPT;
@@ -163,7 +163,7 @@ _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void __atomic_notify_all(const _
   std::__cxx_atomic_notify_all(__atomic_waitable_traits<__decay_t<_AtomicWaitable> >::__atomic_contention_address(__a));
 }
 
-#else // _LIBCPP_HAS_NO_THREADS
+#else // _LIBCPP_HAS_THREADS
 
 template <class _AtomicWaitable, class _Poll>
 _LIBCPP_HIDE_FROM_ABI void __atomic_wait_unless(const _AtomicWaitable& __a, _Poll&& __poll, memory_order __order) {
@@ -177,7 +177,7 @@ _LIBCPP_HIDE_FROM_ABI void __atomic_notify_one(const _AtomicWaitable&) {}
 template <class _AtomicWaitable>
 _LIBCPP_HIDE_FROM_ABI void __atomic_notify_all(const _AtomicWaitable&) {}
 
-#endif // _LIBCPP_HAS_NO_THREADS
+#endif // _LIBCPP_HAS_THREADS
 
 template <typename _Tp>
 _LIBCPP_HIDE_FROM_ABI bool __cxx_nonatomic_compare_equal(_Tp const& __lhs, _Tp const& __rhs) {

libcxx/include/__chrono/convert_to_tm.h

@@ -180,8 +180,7 @@ _LIBCPP_HIDE_FROM_ABI _Tm __convert_to_tm(const _ChronoT& __value) {
     // Has no time information.
   } else if constexpr (same_as<_ChronoT, chrono::local_info>) {
     // Has no time information.
-#    if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM) &&                          \
-        !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#    if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION
   } else if constexpr (__is_specialization_v<_ChronoT, chrono::zoned_time>) {
     return std::__convert_to_tm<_Tm>(
         chrono::sys_time<typename _ChronoT::duration>{__value.get_local_time().time_since_epoch()});

libcxx/include/__chrono/formatter.h

@@ -12,7 +12,7 @@
 
 #include <__config>
 
-#ifndef _LIBCPP_HAS_NO_LOCALIZATION
+#if _LIBCPP_HAS_LOCALIZATION
 
 #  include <__algorithm/ranges_copy.h>
 #  include <__chrono/calendar.h>
@@ -143,8 +143,7 @@ __format_sub_seconds(basic_stringstream<_CharT>& __sstr, const chrono::hh_mm_ss<
                    __value.fractional_width);
 }
 
-#    if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB) && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) &&                   \
-        !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#    if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB) && _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
 template <class _CharT, class _Duration, class _TimeZonePtr>
 _LIBCPP_HIDE_FROM_ABI void
 __format_sub_seconds(basic_stringstream<_CharT>& __sstr, const chrono::zoned_time<_Duration, _TimeZonePtr>& __value) {
@@ -156,8 +155,7 @@ template <class _Tp>
 consteval bool __use_fraction() {
   if constexpr (__is_time_point<_Tp>)
     return chrono::hh_mm_ss<typename _Tp::duration>::fractional_width;
-#    if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB) && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) &&                   \
-        !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#    if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB) && _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
   else if constexpr (__is_specialization_v<_Tp, chrono::zoned_time>)
     return chrono::hh_mm_ss<typename _Tp::duration>::fractional_width;
 #    endif
@@ -232,7 +230,7 @@ _LIBCPP_HIDE_FROM_ABI __time_zone __convert_to_time_zone([[maybe_unused]] const
 #    if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB)
   if constexpr (same_as<_Tp, chrono::sys_info>)
     return {__value.abbrev, __value.offset};
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
   else if constexpr (__is_specialization_v<_Tp, chrono::zoned_time>)
     return __formatter::__convert_to_time_zone(__value.get_info());
 #      endif
@@ -450,7 +448,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr bool __weekday_ok(const _Tp& __value) {
     return true;
   else if constexpr (same_as<_Tp, chrono::local_info>)
     return true;
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
   else if constexpr (__is_specialization_v<_Tp, chrono::zoned_time>)
     return true;
 #      endif
@@ -500,7 +498,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr bool __weekday_name_ok(const _Tp& __value) {
     return true;
   else if constexpr (same_as<_Tp, chrono::local_info>)
     return true;
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
   else if constexpr (__is_specialization_v<_Tp, chrono::zoned_time>)
     return true;
 #      endif
@@ -550,7 +548,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr bool __date_ok(const _Tp& __value) {
     return true;
   else if constexpr (same_as<_Tp, chrono::local_info>)
     return true;
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
   else if constexpr (__is_specialization_v<_Tp, chrono::zoned_time>)
     return true;
 #      endif
@@ -600,7 +598,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr bool __month_name_ok(const _Tp& __value) {
     return true;
   else if constexpr (same_as<_Tp, chrono::local_info>)
     return true;
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
   else if constexpr (__is_specialization_v<_Tp, chrono::zoned_time>)
     return true;
 #      endif
@@ -964,7 +962,7 @@ struct formatter<chrono::local_info, _CharT> : public __formatter_chrono<_CharT>
     return _Base::__parse(__ctx, __format_spec::__fields_chrono, __format_spec::__flags{});
   }
 };
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
 // Note due to how libc++'s formatters are implemented there is no need to add
 // the exposition only local-time-format-t abstraction.
 template <class _Duration, class _TimeZonePtr, __fmt_char_type _CharT>
@@ -977,13 +975,13 @@ struct formatter<chrono::zoned_time<_Duration, _TimeZonePtr>, _CharT> : public _
     return _Base::__parse(__ctx, __format_spec::__fields_chrono, __format_spec::__flags::__clock);
   }
 };
-#      endif // !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      endif // _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
 #    endif   // !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB)
 
 #  endif // if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // !_LIBCPP_HAS_NO_LOCALIZATION
+#endif // _LIBCPP_HAS_LOCALIZATION
 
 #endif //  _LIBCPP___CHRONO_FORMATTER_H

libcxx/include/__chrono/high_resolution_clock.h

@@ -22,7 +22,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 namespace chrono {
 
-#ifndef _LIBCPP_HAS_NO_MONOTONIC_CLOCK
+#if _LIBCPP_HAS_MONOTONIC_CLOCK
 typedef steady_clock high_resolution_clock;
 #else
 typedef system_clock high_resolution_clock;

libcxx/include/__chrono/ostream.h

@@ -12,7 +12,7 @@
 
 #include <__config>
 
-#ifndef _LIBCPP_HAS_NO_LOCALIZATION
+#if _LIBCPP_HAS_LOCALIZATION
 
 #  include <__chrono/calendar.h>
 #  include <__chrono/day.h>
@@ -86,7 +86,7 @@ _LIBCPP_HIDE_FROM_ABI auto __units_suffix() {
   else if constexpr (same_as<typename _Period::type, nano>)
     return _LIBCPP_STATICALLY_WIDEN(_CharT, "ns");
   else if constexpr (same_as<typename _Period::type, micro>)
-#    ifndef _LIBCPP_HAS_NO_UNICODE
+#    if _LIBCPP_HAS_UNICODE
     return _LIBCPP_STATICALLY_WIDEN(_CharT, "\u00b5s");
 #    else
     return _LIBCPP_STATICALLY_WIDEN(_CharT, "us");
@@ -307,7 +307,7 @@ operator<<(basic_ostream<_CharT, _Traits>& __os, const local_info& __info) {
              _LIBCPP_STATICALLY_WIDEN(_CharT, "{}: {{{}, {}}}"), __result(), __info.first, __info.second);
 }
 
-#      if !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
+#      if _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM
 template <class _CharT, class _Traits, class _Duration, class _TimeZonePtr>
 _LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
 operator<<(basic_ostream<_CharT, _Traits>& __os, const zoned_time<_Duration, _TimeZonePtr>& __tp) {
@@ -322,6 +322,6 @@ operator<<(basic_ostream<_CharT, _Traits>& __os, const zoned_time<_Duration, _Ti
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // !_LIBCPP_HAS_NO_LOCALIZATION
+#endif // _LIBCPP_HAS_LOCALIZATION
 
 #endif // _LIBCPP___CHRONO_OSTREAM_H

libcxx/include/__chrono/parser_std_format_spec.h

@@ -12,7 +12,7 @@
 
 #include <__config>
 
-#if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#if _LIBCPP_HAS_LOCALIZATION
 
 #  include <__format/concepts.h>
 #  include <__format/format_error.h>
@@ -416,6 +416,6 @@ class _LIBCPP_TEMPLATE_VIS __parser_chrono {
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#endif // _LIBCPP_HAS_LOCALIZATION
 
 #endif // _LIBCPP___CHRONO_PARSER_STD_FORMAT_SPEC_H

libcxx/include/__chrono/statically_widen.h

@@ -24,7 +24,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 #if _LIBCPP_STD_VER >= 20
 
-#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#  if _LIBCPP_HAS_WIDE_CHARACTERS
 template <__fmt_char_type _CharT>
 _LIBCPP_HIDE_FROM_ABI constexpr const _CharT* __statically_widen(const char* __str, const wchar_t* __wstr) {
   if constexpr (same_as<_CharT, char>)
@@ -33,7 +33,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr const _CharT* __statically_widen(const char* __s
     return __wstr;
 }
 #    define _LIBCPP_STATICALLY_WIDEN(_CharT, __str) ::std::__statically_widen<_CharT>(__str, L##__str)
-#  else // _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#  else // _LIBCPP_HAS_WIDE_CHARACTERS
 
 // Without this indirection the unit test test/libcxx/modules_include.sh.cpp
 // fails for the CI build "No wide characters". This seems like a bug.
@@ -43,7 +43,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr const _CharT* __statically_widen(const char* __s
   return __str;
 }
 #    define _LIBCPP_STATICALLY_WIDEN(_CharT, __str) ::std::__statically_widen<_CharT>(__str)
-#  endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#  endif // _LIBCPP_HAS_WIDE_CHARACTERS
 
 #endif // _LIBCPP_STD_VER >= 20
 

libcxx/include/__chrono/steady_clock.h

@@ -22,7 +22,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 namespace chrono {
 
-#ifndef _LIBCPP_HAS_NO_MONOTONIC_CLOCK
+#if _LIBCPP_HAS_MONOTONIC_CLOCK
 class _LIBCPP_EXPORTED_FROM_ABI steady_clock {
 public:
   typedef nanoseconds duration;

libcxx/include/__chrono/time_zone.h

@@ -37,8 +37,7 @@ _LIBCPP_PUSH_MACROS
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#  if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM) &&   \
-      !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#  if _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION
 
 namespace chrono {
 
@@ -170,8 +169,8 @@ operator<=>(const time_zone& __x, const time_zone& __y) noexcept {
 
 } // namespace chrono
 
-#  endif // _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
-         // && !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#  endif // _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM &&
+         // _LIBCPP_HAS_LOCALIZATION
 
 _LIBCPP_END_NAMESPACE_STD