Backport another libc++ patch for std::filesystem (and locale) usage

This fixes linking against a DLL of libc++ while using the common headers
(generated from the static version of the library, but which work for
both shared and static versions) when calling e.g. std::filesystem::u8path.

patches/llvm-project/0001-libcxx-Implement-the-stat-function-family-on-top-of-.patch

@@ -1,7 +1,7 @@
 From 4655075efa11ee17c28493d13760d51e360f7ddd Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 16:59:07 +0200
-Subject: [PATCH 01/24] [libcxx] Implement the stat function family on top of
+Subject: [PATCH 01/25] [libcxx] Implement the stat function family on top of
  native windows APIs
 
 While the windows CRTs (the modern UCRT, and the legacy msvcrt.dll

patches/llvm-project/0002-libcxx-Implement-_FilesystemClock-now-and-__last_wri.patch

@@ -1,7 +1,7 @@
 From ab432bcd28596265e97eb062a19cbbbdc3d426f5 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 22:56:03 +0200
-Subject: [PATCH 02/24] [libcxx] Implement _FilesystemClock::now() and
+Subject: [PATCH 02/25] [libcxx] Implement _FilesystemClock::now() and
  __last_write_time for windows
 
 Differential Revision: https://reviews.llvm.org/D91142

patches/llvm-project/0003-libcxx-Hook-up-a-number-of-operation-functions-to-th.patch

@@ -1,7 +1,7 @@
 From 13bc151ad49587f94a123cdb3e2ba770c1513d9d Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Fri, 6 Nov 2020 11:16:30 +0200
-Subject: [PATCH 03/24] [libcxx] Hook up a number of operation functions to
+Subject: [PATCH 03/25] [libcxx] Hook up a number of operation functions to
  their windows counterparts
 
 Use the corresponding wchar functions, named "_wfunc" instead of "func",

patches/llvm-project/0004-libcxx-Sanitize-paths-before-creating-symlinks-on-wi.patch

@@ -1,7 +1,7 @@
 From 21ffff20ef2e05f8c99bd120d7b1212d75f14dcd Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Mon, 9 Nov 2020 15:20:18 +0200
-Subject: [PATCH 04/24] [libcxx] Sanitize paths before creating symlinks on
+Subject: [PATCH 04/25] [libcxx] Sanitize paths before creating symlinks on
  windows
 
 The MS STL does even more cleanup (corresponding to lexically_normal

patches/llvm-project/0005-libcxx-Implement-the-space-function-for-windows.patch

@@ -1,7 +1,7 @@
 From 51a0f3a5af65c8e8e1618dc5621705471aba2151 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 23:32:13 +0200
-Subject: [PATCH 05/24] [libcxx] Implement the space function for windows
+Subject: [PATCH 05/25] [libcxx] Implement the space function for windows
 
 Differential Revision: https://reviews.llvm.org/D91168
 

patches/llvm-project/0006-libcxx-Implement-the-current_path-function-for-windo.patch

@@ -1,7 +1,7 @@
 From 0bdb2f73e8ba72de291d1ca95363835ab538bdab Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 23:46:12 +0200
-Subject: [PATCH 06/24] [libcxx] Implement the current_path function for
+Subject: [PATCH 06/25] [libcxx] Implement the current_path function for
  windows
 
 Differential Revision: https://reviews.llvm.org/D91169

patches/llvm-project/0007-libcxx-Implement-the-canonical-function-for-windows.patch

@@ -1,7 +1,7 @@
 From b6ef948856bfde6326ebc2d1fddc24890b4182f9 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 23:51:12 +0200
-Subject: [PATCH 07/24] [libcxx] Implement the canonical function for windows
+Subject: [PATCH 07/25] [libcxx] Implement the canonical function for windows
 
 Differential Revision: https://reviews.llvm.org/D91170
 

patches/llvm-project/0008-libcxx-Implement-the-permissions-function-for-window.patch

@@ -1,7 +1,7 @@
 From 96748da73f57e6b080643d03e41e8a690ee571a9 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 23:55:10 +0200
-Subject: [PATCH 08/24] [libcxx] Implement the permissions function for windows
+Subject: [PATCH 08/25] [libcxx] Implement the permissions function for windows
 
 Differential Revision: https://reviews.llvm.org/D91171
 

patches/llvm-project/0009-libcxx-Implement-the-read_symlink-function-for-windo.patch

@@ -1,7 +1,7 @@
 From f28542330202fae54a6fee1bf02a311feef3f60a Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 23:51:18 +0200
-Subject: [PATCH 09/24] [libcxx] Implement the read_symlink function for
+Subject: [PATCH 09/25] [libcxx] Implement the read_symlink function for
  windows
 
 Differential Revision: https://reviews.llvm.org/D91172

patches/llvm-project/0010-libcxx-Use-the-posix-code-for-directory_entry-__do_r.patch

@@ -1,7 +1,7 @@
 From 6f225c9fca50bda8911a4909b3cbf0eb28733384 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Fri, 30 Oct 2020 22:24:25 +0200
-Subject: [PATCH 10/24] [libcxx] Use the posix code for
+Subject: [PATCH 10/25] [libcxx] Use the posix code for
  directory_entry::__do_refresh
 
 This works just fine for windows, as all the functions it calls

patches/llvm-project/0011-libcxx-Implement-temp_directory_path-using-GetTempPa.patch

@@ -1,7 +1,7 @@
 From 3474a416fef709f218ff5897842819d379495cad Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Thu, 29 Oct 2020 12:10:26 +0200
-Subject: [PATCH 11/24] [libcxx] Implement temp_directory_path using
+Subject: [PATCH 11/25] [libcxx] Implement temp_directory_path using
  GetTempPath on windows
 
 This does roughly the same as the manual implementation, but checks

patches/llvm-project/0012-libcxx-Implement-parsing-of-root_name-for-paths-on-w.patch

@@ -1,7 +1,7 @@
 From 3f12aeb4ae3fd43d98f0c698952713d9fef7bef3 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Tue, 3 Nov 2020 23:52:32 +0200
-Subject: [PATCH 12/24] [libcxx] Implement parsing of root_name for paths on
+Subject: [PATCH 12/25] [libcxx] Implement parsing of root_name for paths on
  windows
 
 Differential Revision: https://reviews.llvm.org/D91176

patches/llvm-project/0013-libcxx-Implement-is_absolute-properly-for-windows.patch

@@ -1,7 +1,7 @@
 From bd50990c64deae4ce6027767659c75a22822e2f5 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Sun, 1 Nov 2020 23:39:03 +0200
-Subject: [PATCH 13/24] [libcxx] Implement is_absolute properly for windows
+Subject: [PATCH 13/25] [libcxx] Implement is_absolute properly for windows
 
 Differential Revision: https://reviews.llvm.org/D91177
 

patches/llvm-project/0014-libcxx-Implement-append-and-operator-properly-for-wi.patch

@@ -1,7 +1,7 @@
 From bd884f520faaa41618d6e901e1631ff02fab3044 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Wed, 4 Nov 2020 15:59:56 +0200
-Subject: [PATCH 14/24] [libcxx] Implement append and operator/ properly for
+Subject: [PATCH 14/25] [libcxx] Implement append and operator/ properly for
  windows
 
 The root_path function has to be changed to return the parsed bit

patches/llvm-project/0015-libcxx-Have-lexically_normal-return-the-path-with-pr.patch

@@ -1,7 +1,7 @@
 From 6131abb23fc2990f9a869ef3d9c63bb0fd5ff464 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Thu, 5 Nov 2020 23:09:15 +0200
-Subject: [PATCH 15/24] [libcxx] Have lexically_normal return the path with
+Subject: [PATCH 15/25] [libcxx] Have lexically_normal return the path with
  preferred separators
 
 Differential Revision: https://reviews.llvm.org/D91179

patches/llvm-project/0016-libcxx-Make-generic_-string-return-paths-with-forwar.patch

@@ -1,7 +1,7 @@
 From 415ea201cb19775f253dfb0cf8dc561891cff02d Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Mon, 9 Nov 2020 11:45:13 +0200
-Subject: [PATCH 16/24] [libcxx] Make generic_*string return paths with forward
+Subject: [PATCH 16/25] [libcxx] Make generic_*string return paths with forward
  slashes on windows
 
 This matches what MS STL returns; in std::filesystem, forward slashes

patches/llvm-project/0017-SystemZ-ZOS-Guard-using-declaration-for-fchmodat.patch

@@ -1,7 +1,7 @@
 From c8c08547b2d1e87391213846c7e17f5426a3dd48 Mon Sep 17 00:00:00 2001
 From: Zbigniew Sarbinowski <zibi@ca.ibm.com>
 Date: Thu, 18 Feb 2021 14:49:46 +0000
-Subject: [PATCH 17/24] [SystemZ][ZOS] Guard using declaration for ::fchmodat
+Subject: [PATCH 17/25] [SystemZ][ZOS] Guard using declaration for ::fchmodat
 
 The use of fchmodat() is beeing guarded but its using declaration is not. Let's use the same guard in both places to avoid compiler errors on platforms where `fchmodat` does not exist.
 

patches/llvm-project/0018-libcxx-Enable-filesystem-by-default-for-mingw-target.patch

@@ -1,7 +1,7 @@
 From ff2e16fe051405232fbd9a09c406767b229d27ec Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Thu, 5 Nov 2020 00:13:22 +0200
-Subject: [PATCH 18/24] [libcxx] Enable filesystem by default for mingw targets
+Subject: [PATCH 18/25] [libcxx] Enable filesystem by default for mingw targets
 
 This feature can be built successfully for windows now. However,
 the helper functions for __int128_t aren't available in MSVC

patches/llvm-project/0019-libcxx-Explicitly-return-the-expected-error-code-in-.patch

@@ -1,7 +1,7 @@
 From 69856f3e59b210249020504329e016c691f138e9 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Fri, 18 Dec 2020 13:34:35 +0200
-Subject: [PATCH 19/24] [libcxx] Explicitly return the expected error code in
+Subject: [PATCH 19/25] [libcxx] Explicitly return the expected error code in
  create_directories if the parent isn't a directory
 
 On windows, going ahead and actually trying to create the directory

patches/llvm-project/0020-libcxx-Avoid-infinite-recursion-in-create_directorie.patch

@@ -1,7 +1,7 @@
 From 6c968da9f1e9281055d31f66c292f81de204924d Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Sat, 27 Feb 2021 19:12:25 +0200
-Subject: [PATCH 20/24] [libcxx] Avoid infinite recursion in
+Subject: [PATCH 20/25] [libcxx] Avoid infinite recursion in
  create_directories, if the root directory doesn't exist
 
 Differential Revision: https://reviews.llvm.org/D97618

patches/llvm-project/0021-libcxx-Map-ERROR_BAD_PATHNAME-to-errc-no_such_file_o.patch

@@ -1,7 +1,7 @@
 From cd87c3f6b36fd6cd991b8e3a3ac85dc208d55ea1 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Sat, 27 Feb 2021 16:09:49 +0200
-Subject: [PATCH 21/24] [libcxx] Map ERROR_BAD_PATHNAME to
+Subject: [PATCH 21/25] [libcxx] Map ERROR_BAD_PATHNAME to
  errc::no_such_file_or_directory on windows
 
 Opening a path like \\server (without a trailing share name and

patches/llvm-project/0022-libcxx-Avoid-intermediate-string-objects-for-substri.patch

@@ -1,7 +1,7 @@
 From 497842a9ebb0ca1a6f871a07c0f4b4f1c700a798 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Thu, 11 Mar 2021 13:06:08 +0200
-Subject: [PATCH 22/24] [libcxx] Avoid intermediate string objects for
+Subject: [PATCH 22/25] [libcxx] Avoid intermediate string objects for
  substrings in windows operator/=
 
 Check that appends with a path object doesn't do allocations, even

patches/llvm-project/0023-libcxx-Test-accessing-a-directory-on-windows-that-gi.patch

@@ -1,7 +1,7 @@
 From 9a1bb266e38b31c78de03abc2d41cdd3245595d0 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
 Date: Mon, 8 Mar 2021 12:03:30 +0200
-Subject: [PATCH 23/24] [libcxx] Test accessing a directory on windows that
+Subject: [PATCH 23/25] [libcxx] Test accessing a directory on windows that
  gives "access denied" errors
 
 Fix handling of skip_permission_denied on windows; after converting

patches/llvm-project/0024-libc-Improve-src-filesystem-s-formatting-of-paths.patch

@@ -1,7 +1,7 @@
 From 7a94808f488301270f4a55ff7a17a8ebff3d388c Mon Sep 17 00:00:00 2001
 From: Arthur O'Dwyer <arthur.j.odwyer@gmail.com>
 Date: Fri, 5 Mar 2021 20:13:35 -0500
-Subject: [PATCH 24/24] [libc++] Improve src/filesystem's formatting of paths.
+Subject: [PATCH 24/25] [libc++] Improve src/filesystem's formatting of paths.
 
 This is my attempt to merge D98077 (bugfix the format strings for
 Windows paths, which use wchar_t not char)

patches/llvm-project/0025-libcxx-Make-the-visibility-attributes-consistent-for.patch

@@ -0,0 +1,98 @@
+From 138e1609764e2226938df8cd6176303b41e4f325 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
+Date: Tue, 18 May 2021 14:45:08 +0000
+Subject: [PATCH 25/25] [libcxx] Make the visibility attributes consistent for
+ __narrow_to_utf8/__widen_from_utf8
+
+Use the same visiblity attributes as for all other template
+specializations in the same file; declare the specialization itself
+using _LIBCPP_TYPE_VIS, and don't use _LIBCPP_EXPORTED_FROM_ABI on
+the destructor. Methods that are excluded from the ABI are marked
+with _LIBCPP_INLINE_VISIBILITY.
+
+This makes the vtable exported from DLL builds of libc++. Practically,
+it doesn't make any difference for the CI configuration, but it
+can make a difference in mingw setups.
+
+Differential Revision: https://reviews.llvm.org/D102717
+
+(cherry picked from commit 3a6be27978aa3e83e9dc2ff2402b2569ce0686fd)
+---
+ libcxx/include/__locale | 16 ++++++++--------
+ 1 file changed, 8 insertions(+), 8 deletions(-)
+
+diff --git a/libcxx/include/__locale b/libcxx/include/__locale
+index 77e5faab2676..c2800e88e8d2 100644
+--- a/libcxx/include/__locale
++++ b/libcxx/include/__locale
+@@ -1484,14 +1484,14 @@ struct __narrow_to_utf8<8>
+ 
+ _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+ template <>
+-struct _LIBCPP_TEMPLATE_VIS __narrow_to_utf8<16>
++struct _LIBCPP_TYPE_VIS __narrow_to_utf8<16>
+     : public codecvt<char16_t, char, mbstate_t>
+ {
+     _LIBCPP_INLINE_VISIBILITY
+     __narrow_to_utf8() : codecvt<char16_t, char, mbstate_t>(1) {}
+ _LIBCPP_SUPPRESS_DEPRECATED_POP
+ 
+-    _LIBCPP_EXPORTED_FROM_ABI ~__narrow_to_utf8();
++    ~__narrow_to_utf8();
+ 
+     template <class _OutputIterator, class _CharT>
+     _LIBCPP_INLINE_VISIBILITY
+@@ -1520,14 +1520,14 @@ _LIBCPP_SUPPRESS_DEPRECATED_POP
+ 
+ _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+ template <>
+-struct _LIBCPP_TEMPLATE_VIS __narrow_to_utf8<32>
++struct _LIBCPP_TYPE_VIS __narrow_to_utf8<32>
+     : public codecvt<char32_t, char, mbstate_t>
+ {
+     _LIBCPP_INLINE_VISIBILITY
+     __narrow_to_utf8() : codecvt<char32_t, char, mbstate_t>(1) {}
+ _LIBCPP_SUPPRESS_DEPRECATED_POP
+ 
+-    _LIBCPP_EXPORTED_FROM_ABI ~__narrow_to_utf8();
++    ~__narrow_to_utf8();
+ 
+     template <class _OutputIterator, class _CharT>
+     _LIBCPP_INLINE_VISIBILITY
+@@ -1578,14 +1578,14 @@ struct __widen_from_utf8<8>
+ 
+ _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+ template <>
+-struct _LIBCPP_TEMPLATE_VIS __widen_from_utf8<16>
++struct _LIBCPP_TYPE_VIS __widen_from_utf8<16>
+     : public codecvt<char16_t, char, mbstate_t>
+ {
+     _LIBCPP_INLINE_VISIBILITY
+     __widen_from_utf8() : codecvt<char16_t, char, mbstate_t>(1) {}
+ _LIBCPP_SUPPRESS_DEPRECATED_POP
+ 
+-    _LIBCPP_EXPORTED_FROM_ABI ~__widen_from_utf8();
++    ~__widen_from_utf8();
+ 
+     template <class _OutputIterator>
+     _LIBCPP_INLINE_VISIBILITY
+@@ -1614,14 +1614,14 @@ _LIBCPP_SUPPRESS_DEPRECATED_POP
+ 
+ _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+ template <>
+-struct _LIBCPP_TEMPLATE_VIS __widen_from_utf8<32>
++struct _LIBCPP_TYPE_VIS __widen_from_utf8<32>
+     : public codecvt<char32_t, char, mbstate_t>
+ {
+     _LIBCPP_INLINE_VISIBILITY
+     __widen_from_utf8() : codecvt<char32_t, char, mbstate_t>(1) {}
+ _LIBCPP_SUPPRESS_DEPRECATED_POP
+ 
+-    _LIBCPP_EXPORTED_FROM_ABI ~__widen_from_utf8();
++    ~__widen_from_utf8();
+ 
+     template <class _OutputIterator>
+     _LIBCPP_INLINE_VISIBILITY
+-- 
+2.25.1
+