diff --git a/libcxx/.clang-format b/libcxx/.clang-format
--- a/libcxx/.clang-format
+++ b/libcxx/.clang-format
@@ -28,7 +28,6 @@
                   '_LIBCPP_TEMPLATE_DATA_VIS',
                   '_LIBCPP_EXPORTED_FROM_ABI',
                   '_LIBCPP_OVERRIDABLE_FUNC_VIS',
-                  '_LIBCPP_ENUM_VIS',
                   '_LIBCPP_EXTERN_TEMPLATE_TYPE_VIS',
                   '_LIBCPP_INTERNAL_LINKAGE',
                   '_LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION',
diff --git a/libcxx/docs/DesignDocs/VisibilityMacros.rst b/libcxx/docs/DesignDocs/VisibilityMacros.rst
--- a/libcxx/docs/DesignDocs/VisibilityMacros.rst
+++ b/libcxx/docs/DesignDocs/VisibilityMacros.rst
@@ -72,19 +72,6 @@
   **Windows Behavior**: DLLs do not support dllimport/export on class templates.
   The macro has an empty definition on this platform.
 
-
-**_LIBCPP_ENUM_VIS**
-  Mark the typeinfo of an enum as having default visibility. This attribute
-  should be applied to all enum declarations.
-
-  **Windows Behavior**: DLLs do not support importing or exporting enumeration
-  typeinfo. The macro has an empty definition on this platform.
-
-  **GCC Behavior**: GCC un-hides the typeinfo for enumerations by default, even
-  if `-fvisibility=hidden` is specified. Additionally applying a visibility
-  attribute to an enum class results in a warning. The macro has an empty
-  definition with GCC.
-
 **_LIBCPP_EXTERN_TEMPLATE_TYPE_VIS**
   Mark the member functions, typeinfo, and vtable of the type named in
   an extern template declaration as being exported by the libc++ library.
diff --git a/libcxx/include/__charconv/chars_format.h b/libcxx/include/__charconv/chars_format.h
--- a/libcxx/include/__charconv/chars_format.h
+++ b/libcxx/include/__charconv/chars_format.h
@@ -21,7 +21,7 @@
 
 #if _LIBCPP_STD_VER >= 17
 
-enum class _LIBCPP_ENUM_VIS chars_format { scientific = 0x1, fixed = 0x2, hex = 0x4, general = fixed | scientific };
+enum class chars_format { scientific = 0x1, fixed = 0x2, hex = 0x4, general = fixed | scientific };
 
 inline _LIBCPP_HIDE_FROM_ABI constexpr chars_format operator~(chars_format __x) {
   return chars_format(~std::__to_underlying(__x));
diff --git a/libcxx/include/__compare/ordering.h b/libcxx/include/__compare/ordering.h
--- a/libcxx/include/__compare/ordering.h
+++ b/libcxx/include/__compare/ordering.h
@@ -22,13 +22,13 @@
 #if _LIBCPP_STD_VER >= 20
 
 // exposition only
-enum class _LIBCPP_ENUM_VIS _OrdResult : signed char {
+enum class _OrdResult : signed char {
   __less = -1,
   __equiv = 0,
   __greater = 1
 };
 
-enum class _LIBCPP_ENUM_VIS _NCmpResult : signed char {
+enum class _NCmpResult : signed char {
   __unordered = -127
 };
 
diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -543,7 +543,6 @@
 #    define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
 #    define _LIBCPP_TEMPLATE_VIS
 #    define _LIBCPP_TEMPLATE_DATA_VIS
-#    define _LIBCPP_ENUM_VIS
 
 #  else
 
@@ -571,20 +570,16 @@
 #      define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
 #    endif
 
-#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#      if __has_attribute(__type_visibility__)
-#        define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default")))
-#      else
-#        define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default")))
-#      endif
+#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && !__has_attribute(__type_visibility__)
+#      define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default")))
 #    else
 #      define _LIBCPP_TEMPLATE_VIS
 #    endif
 
 #    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
-#      define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default")))
+#      define _LIBCPP_TYPE_VISIBILITY_DEFAULT __attribute__((__type_visibility__("default")))
 #    else
-#      define _LIBCPP_ENUM_VIS
+#      define _LIBCPP_TYPE_VISIBILITY_DEFAULT
 #    endif
 
 #  endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
@@ -658,7 +653,8 @@
 
 // Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
 // clang-format off
-#  define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
+#  define _LIBCPP_BEGIN_NAMESPACE_STD namespace _LIBCPP_TYPE_VISIBILITY_DEFAULT _LIBCPP_HIDDEN std {                   \
+                               inline namespace _LIBCPP_ABI_NAMESPACE {
 #  define _LIBCPP_END_NAMESPACE_STD }}
 #  define _VSTD std
 
@@ -711,7 +707,7 @@
 // clang-format on
 
 #  else // _LIBCPP_CXX03_LANG
-#    define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
+#    define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x
 #    define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
 #  endif // _LIBCPP_CXX03_LANG
 
diff --git a/libcxx/include/__filesystem/copy_options.h b/libcxx/include/__filesystem/copy_options.h
--- a/libcxx/include/__filesystem/copy_options.h
+++ b/libcxx/include/__filesystem/copy_options.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
 
-enum class _LIBCPP_ENUM_VIS copy_options : unsigned short {
+enum class copy_options : unsigned short {
   none = 0,
   skip_existing = 1,
   overwrite_existing = 2,
diff --git a/libcxx/include/__filesystem/directory_options.h b/libcxx/include/__filesystem/directory_options.h
--- a/libcxx/include/__filesystem/directory_options.h
+++ b/libcxx/include/__filesystem/directory_options.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
 
-enum class _LIBCPP_ENUM_VIS directory_options : unsigned char {
+enum class directory_options : unsigned char {
   none = 0,
   follow_directory_symlink = 1,
   skip_permission_denied = 2
diff --git a/libcxx/include/__filesystem/file_type.h b/libcxx/include/__filesystem/file_type.h
--- a/libcxx/include/__filesystem/file_type.h
+++ b/libcxx/include/__filesystem/file_type.h
@@ -23,7 +23,7 @@
 
 // On Windows, the library never identifies files as block, character, fifo
 // or socket.
-enum class _LIBCPP_ENUM_VIS file_type : signed char {
+enum class file_type : signed char {
   none = 0,
   not_found = -1,
   regular = 1,
diff --git a/libcxx/include/__filesystem/path.h b/libcxx/include/__filesystem/path.h
--- a/libcxx/include/__filesystem/path.h
+++ b/libcxx/include/__filesystem/path.h
@@ -464,7 +464,7 @@
   typedef basic_string<value_type> string_type;
   typedef basic_string_view<value_type> __string_view;
 
-  enum _LIBCPP_ENUM_VIS format : unsigned char {
+  enum format : unsigned char {
     auto_format,
     native_format,
     generic_format
diff --git a/libcxx/include/__filesystem/perm_options.h b/libcxx/include/__filesystem/perm_options.h
--- a/libcxx/include/__filesystem/perm_options.h
+++ b/libcxx/include/__filesystem/perm_options.h
@@ -23,7 +23,7 @@
 
 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
 
-enum class _LIBCPP_ENUM_VIS perm_options : unsigned char {
+enum class perm_options : unsigned char {
   replace = 1,
   add = 2,
   remove = 4,
diff --git a/libcxx/include/__filesystem/perms.h b/libcxx/include/__filesystem/perms.h
--- a/libcxx/include/__filesystem/perms.h
+++ b/libcxx/include/__filesystem/perms.h
@@ -27,7 +27,7 @@
 // file, and the executable bit is always returned as set. When setting
 // permissions, as long as the write bit is set for either owner, group or
 // others, the readonly flag is cleared.
-enum class _LIBCPP_ENUM_VIS perms : unsigned {
+enum class perms : unsigned {
   none = 0,
 
   owner_read = 0400,
diff --git a/libcxx/include/__format/format_arg.h b/libcxx/include/__format/format_arg.h
--- a/libcxx/include/__format/format_arg.h
+++ b/libcxx/include/__format/format_arg.h
@@ -54,7 +54,7 @@
 /// handle to satisfy the user observable behaviour. The internal function
 /// __visit_format_arg doesn't do this wrapping. So in the format functions
 /// this function is used to avoid unneeded overhead.
-enum class _LIBCPP_ENUM_VIS __arg_t : uint8_t {
+enum class __arg_t : uint8_t {
   __none,
   __boolean,
   __char_type,
diff --git a/libcxx/include/__format/formatter_output.h b/libcxx/include/__format/formatter_output.h
--- a/libcxx/include/__format/formatter_output.h
+++ b/libcxx/include/__format/formatter_output.h
@@ -491,7 +491,7 @@
   return static_cast<make_unsigned_t<_CharT>>(__value);
 }
 
-enum class _LIBCPP_ENUM_VIS __escape_quotation_mark { __apostrophe, __double_quote };
+enum class __escape_quotation_mark { __apostrophe, __double_quote };
 
 // [format.string.escaped]/2
 template <class _CharT>
diff --git a/libcxx/include/__format/parser_std_format_spec.h b/libcxx/include/__format/parser_std_format_spec.h
--- a/libcxx/include/__format/parser_std_format_spec.h
+++ b/libcxx/include/__format/parser_std_format_spec.h
@@ -160,7 +160,7 @@
 inline constexpr __fields __fields_fill_align_width{};
 #  endif
 
-enum class _LIBCPP_ENUM_VIS __alignment : uint8_t {
+enum class __alignment : uint8_t {
   /// No alignment is set in the format string.
   __default,
   __left,
@@ -169,7 +169,7 @@
   __zero_padding
 };
 
-enum class _LIBCPP_ENUM_VIS __sign : uint8_t {
+enum class __sign : uint8_t {
   /// No sign is set in the format string.
   ///
   /// The sign isn't allowed for certain format-types. By using this value
@@ -181,7 +181,7 @@
   __space
 };
 
-enum class _LIBCPP_ENUM_VIS __type : uint8_t {
+enum class __type : uint8_t {
   __default,
   __string,
   __binary_lower_case,
diff --git a/libcxx/include/__fwd/subrange.h b/libcxx/include/__fwd/subrange.h
--- a/libcxx/include/__fwd/subrange.h
+++ b/libcxx/include/__fwd/subrange.h
@@ -23,7 +23,7 @@
 
 namespace ranges {
 
-enum class _LIBCPP_ENUM_VIS subrange_kind : bool { unsized, sized };
+enum class subrange_kind : bool { unsized, sized };
 
 template <input_or_output_iterator _Iter, sentinel_for<_Iter> _Sent, subrange_kind _Kind>
   requires(_Kind == subrange_kind::sized || !sized_sentinel_for<_Sent, _Iter>)
diff --git a/libcxx/include/new b/libcxx/include/new
--- a/libcxx/include/new
+++ b/libcxx/include/new
@@ -185,7 +185,7 @@
 #if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) && \
     !defined(_LIBCPP_ABI_VCRUNTIME)
 #ifndef _LIBCPP_CXX03_LANG
-enum class _LIBCPP_ENUM_VIS align_val_t : size_t { };
+enum class align_val_t : size_t { };
 #else
 enum align_val_t { __zero = 0, __max = (size_t)-1 };
 #endif