Attachment 448438 Details for Bug 233963 – Patch

[patch] Patch

bug-233963-20220105151607.patch (text/plain), 52.77 KB, created by Alex Christensen on 2022-01-05 15:16:08 PST

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Creator: Alex Christensen

Created: 2022-01-05 15:16:08 PST

Size: 52.77 KB

patch

obsolete

>Subversion Revision: 287646
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index 692ff83bbbd63c754870892a068adfdb5b9d7bbc..d8e96ad606759ce620b3b115ff0930e125b95892 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,14 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+        * Configurations/JavaScriptCore.xcconfig:
>+        * DerivedSources.make:
>+
> 2022-01-04  Yusuke Suzuki  <ysuzuki@apple.com>
> 
>         [JSC] Remove m_calleeSaveRegisters from CodeBlock::JITData and rename it to BaselineJITData
>diff --git a/Source/ThirdParty/ANGLE/ChangeLog b/Source/ThirdParty/ANGLE/ChangeLog
>index 5e65c38486b925a5423d6efbdfbbdfb38326757d..7ce0aaf9505139e55173744b901db188aa729042 100644
>--- a/Source/ThirdParty/ANGLE/ChangeLog
>+++ b/Source/ThirdParty/ANGLE/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+
> 2022-01-05  Michael Saboff  <msaboff@apple.com>
> 
>         REGRESSION (r287382): libANGLE is built into a wrong location on iOS
>diff --git a/Source/ThirdParty/ChangeLog b/Source/ThirdParty/ChangeLog
>index 5b683f950652ddb8a713642dbbab22cda7858e50..b1a7ffeeca619b62df4843209543412e629f5828 100644
>--- a/Source/ThirdParty/ChangeLog
>+++ b/Source/ThirdParty/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * gtest/xcode/Config/General.xcconfig:
>+
> 2021-10-14  Myles C. Maxfield  <mmaxfield@apple.com>
> 
>         All the SDKVariant.xcconfig files should match
>diff --git a/Source/ThirdParty/libwebrtc/ChangeLog b/Source/ThirdParty/libwebrtc/ChangeLog
>index 1e2d0d2a5acceb4b937c36da8209528a19fb156e..dc3dcf6d6904405bb711800306a1a9e434ae6d8d 100644
>--- a/Source/ThirdParty/libwebrtc/ChangeLog
>+++ b/Source/ThirdParty/libwebrtc/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+
> 2022-01-05  Michael Saboff  <msaboff@apple.com>
> 
>         REGRESSION (r287382): libANGLE is built into a wrong location on iOS
>diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
>index 5ca8de4ce18dd2ed790d347f5c69ea0639e6f624..f211030259457ccb0cbb5ed58936b920d3eb9256 100644
>--- a/Source/WTF/ChangeLog
>+++ b/Source/WTF/ChangeLog
>@@ -1,3 +1,17 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+        * wtf/FileSystem.cpp:
>+        (WTF::FileSystemImpl::toStdFileSystemPath):
>+        * wtf/text/WTFString.cpp:
>+        (WTF::String::String):
>+        * wtf/text/WTFString.h:
>+
> 2022-01-05  Tim Horton  <timothy_horton@apple.com>
> 
>         Momentum Event Dispatcher: Momentum tails may get truncated if the duration runs longer than the system's
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index e37eac8a9f86fe6c6610a853f7ff6bb05936bcfc..19d746b4ebb899c39c5305b527abbfb8c2b36940 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,13 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+        * DerivedSources.make:
>+
> 2022-01-05  Youenn Fablet  <youenn@apple.com>
> 
>         MediaRecorder should support the bitsPerSecond option
>diff --git a/Source/WebCore/PAL/ChangeLog b/Source/WebCore/PAL/ChangeLog
>index 45124c3cf499d339548797abeb2d68fb0f46992d..075f4c7f26e0ca031fe2e0a3f8431373ec787a82 100644
>--- a/Source/WebCore/PAL/ChangeLog
>+++ b/Source/WebCore/PAL/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+
> 2021-12-21  Sam Weinig  <weinig@apple.com>
> 
>         Add support for premultiplied alpha interpolated gradients and defaulted off option to use them for CSS Gradients
>diff --git a/Source/WebGPU/ChangeLog b/Source/WebGPU/ChangeLog
>index ef92d3468dab7c8b4ffff009c5225a0e446bae71..b25c15e61d1b1690614b60c0d4de02fe8ef97c6e 100644
>--- a/Source/WebGPU/ChangeLog
>+++ b/Source/WebGPU/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+
> 2022-01-01  Jeff Miller  <jeffm@apple.com>
> 
>         Update user-visible copyright strings to include 2022
>diff --git a/Source/WebInspectorUI/ChangeLog b/Source/WebInspectorUI/ChangeLog
>index fd58d971b208ff9391285819da850842bc158bfe..ecfd8457879a042a58545240802ce6ad2e396026 100644
>--- a/Source/WebInspectorUI/ChangeLog
>+++ b/Source/WebInspectorUI/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+
> 2022-01-05  Patrick Angle  <pangle@apple.com>
> 
>         Web Inspector: revert-layer should be autocompleted
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index b6cd24d86cc701d66c2107a3d6a6c456a65eccf4..bbeba42a342ad3710f9e6dff5941d25301285dfb 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,13 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+        * PlatformMac.cmake:
>+
> 2022-01-05  Youenn Fablet  <youenn@apple.com>
> 
>         NetworkRTCProvider::attributedBundleIdentifierFromPageIdentifier should check for m_connection
>diff --git a/Source/WebKitLegacy/ChangeLog b/Source/WebKitLegacy/ChangeLog
>index 57681b21a73439e90bf21ba2449582597e019982..5efb4ce44fc526adbfcfafb769da0cc249baaedc 100644
>--- a/Source/WebKitLegacy/ChangeLog
>+++ b/Source/WebKitLegacy/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * PlatformMac.cmake:
>+
> 2021-12-14  Jean-Yves Avenard  <jya@apple.com>
> 
>         Rename SharedBuffer classes.
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index 17cda5ac770a7cd079d8db6669a67fa2538f2b0b..c5e8159c3fbc4be747f808abf17c68d652cd2380 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,14 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+        * Configurations/WebKitLegacy.xcconfig:
>+        * MigrateHeaders.make:
>+
> 2022-01-02  Wenson Hsieh  <wenson_hsieh@apple.com>
> 
>         [WebKit2] Camera continuity is disabled in richly editable content
>diff --git a/Source/bmalloc/ChangeLog b/Source/bmalloc/ChangeLog
>index 73b8a43d07a0b0840e5b1f981e114b967bebaa55..51186f246245655fe2bee108613ef832cd8a84a0 100644
>--- a/Source/bmalloc/ChangeLog
>+++ b/Source/bmalloc/ChangeLog
>@@ -1,3 +1,13 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Configurations/Base.xcconfig:
>+        * libpas/libpas.xcodeproj/project.pbxproj:
>+
> 2022-01-04  Philippe Normand  <pnormand@igalia.com>
> 
>         [PAS] constant-logical-operand clang warnings
>diff --git a/Source/JavaScriptCore/Configurations/Base.xcconfig b/Source/JavaScriptCore/Configurations/Base.xcconfig
>index 7d181892deba153beca69a06c3b17bb8e3f74ba5..a8b90707238ed8fad8f13d82b0d7065e13e91f22 100644
>--- a/Source/JavaScriptCore/Configurations/Base.xcconfig
>+++ b/Source/JavaScriptCore/Configurations/Base.xcconfig
>@@ -33,7 +33,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>diff --git a/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig b/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig
>index c905fed39826024731239b7e771d8888b060e68c..fce38d86ee5107d84c01e977fc1fc475132acc3d 100644
>--- a/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig
>+++ b/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig
>@@ -27,7 +27,7 @@ DEFINES_MODULE = YES;
> MODULEMAP_FILE = $(SRCROOT)/JavaScriptCore.modulemap;
> 
> // Prevent C++ standard library operator new, delete and their related exception types from being exported as weak symbols.
>-OTHER_LDFLAGS_HIDE_SYMBOLS = -Wl,-unexported_symbol,__ZTISt9bad_alloc -Wl,-unexported_symbol,__ZTISt9exception -Wl,-unexported_symbol,__ZTSSt9bad_alloc -Wl,-unexported_symbol,__ZTSSt9exception -Wl,-unexported_symbol,__ZdlPvS_ -Wl,-unexported_symbol,__ZnwmPv -Wl,-unexported_symbol,__ZNKSt3__18functionIFvvEEclEv -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEEC1EOS2_ -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEEC2EOS2_ -Wl,-unexported_symbol,__ZNKSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEEclES3_S5_ -Wl,-unexported_symbol,__ZNSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEED1Ev -Wl,-unexported_symbol,__ZNSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEED2Ev -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEED1Ev -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEED2Ev -Wl,-unexported_symbol,__ZTVNSt3__117bad_function_callE -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIPKcS4_cLb1EE11__range_endES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIPKcS4_cLb1EE13__range_beginES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE14__append_rangeIPKcEENS_9enable_ifIXsr27__is_cpp17_forward_iteratorIT_EE5valueEvE4typeERNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEES8_S8_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE15__append_sourceIPKcEEvRNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEERKT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE14__append_rangeIPKcEENS_9enable_ifIXsr21__is_forward_iteratorIT_EE5valueEvE4typeERNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEES8_S8_ -Wl,-unexported_symbol,__ZNKSt3__14__fs10filesystem18directory_iteratordeEv -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem18directory_iteratorppEv -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIA10_cPccLb1EE11__range_endEPKc -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIA10_cPccLb1EE13__range_beginEPKc -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem4pathdVERKS2_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE15__append_sourceIA10_cEEvRNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEERKT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__throw_filesystem_errorIJRPKcRKNS1_4pathERKNS_10error_codeEEEEvDpOT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem14__is_separatorIcEENS_9enable_ifIXsr18__can_convert_charIT_EE5valueEbE4typeES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIPKcS4_cLb1EE15__first_or_nullES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem4path20__source_is_absoluteIcEEbT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem4path6appendIPKcEENS_9enable_ifIXsr13__is_pathableIT_EE5valueERS2_E4typeERKS7_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem6u8pathIPKcEENS_9enable_ifIXsr13__is_pathableIT_EE5valueENS1_4pathEE4typeERKS6_ -Wl,-unexported_symbol,__ZNKSt3__14__fs10filesystem18directory_iteratorptEv -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem18directory_iterator9incrementERNS_10error_codeE;
>+OTHER_LDFLAGS_HIDE_SYMBOLS = -Wl,-unexported_symbol,__ZTISt9bad_alloc -Wl,-unexported_symbol,__ZTISt9exception -Wl,-unexported_symbol,__ZTSSt9bad_alloc -Wl,-unexported_symbol,__ZTSSt9exception -Wl,-unexported_symbol,__ZdlPvS_ -Wl,-unexported_symbol,__ZnwmPv -Wl,-unexported_symbol,__ZNKSt3__18functionIFvvEEclEv -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEEC1EOS2_ -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEEC2EOS2_ -Wl,-unexported_symbol,__ZNKSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEEclES3_S5_ -Wl,-unexported_symbol,__ZNSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEED1Ev -Wl,-unexported_symbol,__ZNSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEED2Ev -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEED1Ev -Wl,-unexported_symbol,__ZNSt3__18functionIFvvEED2Ev -Wl,-unexported_symbol,__ZTVNSt3__117bad_function_callE -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIPKcS4_cLb1EE11__range_endES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIPKcS4_cLb1EE13__range_beginES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE14__append_rangeIPKcEENS_9enable_ifIXsr27__is_cpp17_forward_iteratorIT_EE5valueEvE4typeERNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEES8_S8_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE15__append_sourceIPKcEEvRNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEERKT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE14__append_rangeIPKcEENS_9enable_ifIXsr21__is_forward_iteratorIT_EE5valueEvE4typeERNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEES8_S8_ -Wl,-unexported_symbol,__ZNKSt3__14__fs10filesystem18directory_iteratordeEv -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem18directory_iteratorppEv -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIA10_cPccLb1EE11__range_endEPKc -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIA10_cPccLb1EE13__range_beginEPKc -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem4pathdVERKS2_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIcE15__append_sourceIA10_cEEvRNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEERKT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__throw_filesystem_errorIJRPKcRKNS1_4pathERKNS_10error_codeEEEEvDpOT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem14__is_separatorIcEENS_9enable_ifIXsr18__can_convert_charIT_EE5valueEbE4typeES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem24__is_pathable_char_arrayIPKcS4_cLb1EE15__first_or_nullES4_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem4path20__source_is_absoluteIcEEbT_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem4path6appendIPKcEENS_9enable_ifIXsr13__is_pathableIT_EE5valueERS2_E4typeERKS7_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem6u8pathIPKcEENS_9enable_ifIXsr13__is_pathableIT_EE5valueENS1_4pathEE4typeERKS6_ -Wl,-unexported_symbol,__ZNKSt3__14__fs10filesystem18directory_iteratorptEv -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem18directory_iterator9incrementERNS_10error_codeE -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem20__is_pathable_stringINS_12basic_stringIDuNS_11char_traitsIDuEENS_9allocatorIDuEEEEvE11__range_endERKS8_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem20__is_pathable_stringINS_12basic_stringIDuNS_11char_traitsIDuEENS_9allocatorIDuEEEEvE13__range_beginERKS8_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIDuE14__append_rangeERNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEEPKDuSC_ -Wl,-unexported_symbol,__ZNSt3__14__fs10filesystem8_PathCVTIDuE15__append_sourceINS_12basic_stringIDuNS_11char_traitsIDuEENS_9allocatorIDuEEEEEEvRNS5_IcNS6_IcEENS8_IcEEEERKT_;
> 
> OTHER_LDFLAGS_BASE = $(OTHER_LDFLAGS_HIDE_SYMBOLS) -force_load "$(BUILT_PRODUCTS_DIR)/DerivedSources/JavaScriptCore/libWTF.a";
> OTHER_LDFLAGS[sdk=embedded*] = $(inherited) $(OTHER_LDFLAGS_BASE);
>diff --git a/Source/JavaScriptCore/DerivedSources.make b/Source/JavaScriptCore/DerivedSources.make
>index 1ab9b535abd5595281fdb68c9cc293525987ad5d..8292e51ded17d08c3a7c6273003ed5d86262f030 100644
>--- a/Source/JavaScriptCore/DerivedSources.make
>+++ b/Source/JavaScriptCore/DerivedSources.make
>@@ -44,7 +44,7 @@ endif
> FRAMEWORK_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(FRAMEWORK_SEARCH_PATHS) $(SYSTEM_FRAMEWORK_SEARCH_PATHS) | $(PERL) -e 'print "-F " . join(" -F ", split(" ", <>));')
> HEADER_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(HEADER_SEARCH_PATHS) $(SYSTEM_HEADER_SEARCH_PATHS) | $(PERL) -e 'print "-I" . join(" -I", split(" ", <>));')
> 
>-platform_h_compiler_command = $(CC) -std=gnu++1z -x c++ $(1) $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null
>+platform_h_compiler_command = $(CC) -std=gnu++2a -x c++ $(1) $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null
> 
> FEATURE_AND_PLATFORM_DEFINES := $(shell $(call platform_h_compiler_command,-E -P -dM) | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
> 
>diff --git a/Source/JavaScriptCore/heap/Heap.cpp b/Source/JavaScriptCore/heap/Heap.cpp
>index 10bb954c30ab243dc93bd3c8a06612fc8945b1de..b99f5d57e1a4adbca7093c7f7520760c53b3cb01 100644
>--- a/Source/JavaScriptCore/heap/Heap.cpp
>+++ b/Source/JavaScriptCore/heap/Heap.cpp
>@@ -2913,13 +2913,13 @@ void Heap::addCoreConstraints()
>     m_constraintSet->add(
>         "O", "Output",
>         MAKE_MARKING_CONSTRAINT_EXECUTOR_PAIR(([] (auto& visitor) {
>-            using Visitor = decltype(visitor);
>+            using VisitorType = decltype(visitor);
>             Heap* heap = visitor.heap();
> 
>             // The `visitor2` argument is strangely named because the WinCairo port
>             // gets confused  and thinks we're trying to capture the outer visitor
>             // arg here. Giving it a unique name works around this issue.
>-            auto callOutputConstraint = [] (Visitor& visitor2, HeapCell* heapCell, HeapCell::Kind) {
>+            auto callOutputConstraint = [] (VisitorType& visitor2, HeapCell* heapCell, HeapCell::Kind) {
>                 SetRootMarkReasonScope rootScope(visitor2, RootMarkReason::Output);
>                 VM& vm = visitor2.vm();
>                 JSCell* cell = static_cast<JSCell*>(heapCell);
>@@ -2927,7 +2927,7 @@ void Heap::addCoreConstraints()
>             };
>             
>             auto add = [&] (auto& set) {
>-                RefPtr<SharedTask<void(Visitor&)>> task = set.template forEachMarkedCellInParallel<Visitor>(callOutputConstraint);
>+                RefPtr<SharedTask<void(VisitorType&)>> task = set.template forEachMarkedCellInParallel<VisitorType>(callOutputConstraint);
>                 visitor.addParallelConstraintTask(task);
>             };
> 
>diff --git a/Source/JavaScriptCore/runtime/CachedTypes.cpp b/Source/JavaScriptCore/runtime/CachedTypes.cpp
>index 6ef93fe91e52903ea07464849fa95d7364019ddb..f5dcb879c1857259bb5691000525ec2c5e681ccb 100644
>--- a/Source/JavaScriptCore/runtime/CachedTypes.cpp
>+++ b/Source/JavaScriptCore/runtime/CachedTypes.cpp
>@@ -395,7 +395,7 @@ static std::enable_if_t<!std::is_same<T, SourceType<T>>::value, SourceType<T>>&&
> 
> template<typename Source>
> class CachedObject {
>-    WTF_MAKE_NONCOPYABLE(CachedObject<Source>);
>+    WTF_MAKE_NONCOPYABLE(CachedObject);
> 
> public:
>     using SourceType_ = Source;
>diff --git a/Source/JavaScriptCore/runtime/LiteralParser.h b/Source/JavaScriptCore/runtime/LiteralParser.h
>index eea45f3702023902c1c1f8067905600a4f6f7d58..2e2ab025dbd1b936b330e567feb82511255119e8 100644
>--- a/Source/JavaScriptCore/runtime/LiteralParser.h
>+++ b/Source/JavaScriptCore/runtime/LiteralParser.h
>@@ -68,7 +68,7 @@ struct JSONPData {
> template <typename CharType>
> struct LiteralParserToken {
> private:
>-WTF_MAKE_NONCOPYABLE(LiteralParserToken<CharType>);
>+WTF_MAKE_NONCOPYABLE(LiteralParserToken);
> 
> public:
>     LiteralParserToken() = default;
>diff --git a/Source/JavaScriptCore/shell/PlatformPlayStation.cmake b/Source/JavaScriptCore/shell/PlatformPlayStation.cmake
>index 65144dabfe143824a471b0ab18f45b09da918dfc..c0a4ad242204afe88237c59f170db4192a202e02 100644
>--- a/Source/JavaScriptCore/shell/PlatformPlayStation.cmake
>+++ b/Source/JavaScriptCore/shell/PlatformPlayStation.cmake
>@@ -31,6 +31,6 @@ if (${CMAKE_GENERATOR} MATCHES "Visual Studio")
>     set_source_files_properties(
>         ../API/tests/CustomGlobalObjectClassTest.c
>         ../API/tests/testapi.c
>-        PROPERTIES COMPILE_FLAGS --std=gnu17
>+        PROPERTIES COMPILE_FLAGS --std=gnu2a
>     )
> endif ()
>diff --git a/Source/ThirdParty/ANGLE/Configurations/Base.xcconfig b/Source/ThirdParty/ANGLE/Configurations/Base.xcconfig
>index 0117a2ca8ed460408fe3dfa987c7cf8466451a3b..b9efc6d44fd0293e1336b22ea9154e68e7e05856 100644
>--- a/Source/ThirdParty/ANGLE/Configurations/Base.xcconfig
>+++ b/Source/ThirdParty/ANGLE/Configurations/Base.xcconfig
>@@ -13,7 +13,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
> CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_ARC = NO;
> CLANG_ENABLE_OBJC_WEAK = YES;
>diff --git a/Source/ThirdParty/gtest/xcode/Config/General.xcconfig b/Source/ThirdParty/gtest/xcode/Config/General.xcconfig
>index 212d2fb2bccab7cc172e09c1c509ed59a6fe52a6..0fb4e17baa129aeadb219772ae921b9bbf662e7f 100644
>--- a/Source/ThirdParty/gtest/xcode/Config/General.xcconfig
>+++ b/Source/ThirdParty/gtest/xcode/Config/General.xcconfig
>@@ -52,7 +52,7 @@ SEPARATE_STRIP = YES
> GCC_C_LANGUAGE_STANDARD = c99
> 
> // Force C++14
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> 
> // not sure why apple defaults this on, but it's pretty risky
> ALWAYS_SEARCH_USER_PATHS = NO
>diff --git a/Source/ThirdParty/libwebrtc/Configurations/Base.xcconfig b/Source/ThirdParty/libwebrtc/Configurations/Base.xcconfig
>index 5f68f2fbe040fee76a52db202d645a230f6a9150..37bdc06c1e7eb9d0b2875f099473392518e98170 100644
>--- a/Source/ThirdParty/libwebrtc/Configurations/Base.xcconfig
>+++ b/Source/ThirdParty/libwebrtc/Configurations/Base.xcconfig
>@@ -35,7 +35,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_ARC = YES;
> CLANG_ENABLE_OBJC_WEAK = YES;
>diff --git a/Source/ThirdParty/libwebrtc/Source/webrtc/rtc_base/system/no_unique_address.h b/Source/ThirdParty/libwebrtc/Source/webrtc/rtc_base/system/no_unique_address.h
>index 7f3dc7f7fd10ecfbcb6183aa3f73ae6632f4061b..f754f7d82d0d67dd930b6ffb0dcbcd83704cf9ec 100644
>--- a/Source/ThirdParty/libwebrtc/Source/webrtc/rtc_base/system/no_unique_address.h
>+++ b/Source/ThirdParty/libwebrtc/Source/webrtc/rtc_base/system/no_unique_address.h
>@@ -24,8 +24,7 @@
> // should add support for it starting from C++20. Among clang compilers,
> // clang-cl doesn't support it yet and support is unclear also when the target
> // platform is iOS.
>-#if ((defined(__clang__) && !defined(_MSC_VER) && !defined(WEBRTC_MAC)) || \
>-     __cplusplus > 201703L)
>+#if defined(__has_cpp_attribute) && __has_cpp_attribute(no_unique_address)
> // NOLINTNEXTLINE(whitespace/braces)
> #define RTC_NO_UNIQUE_ADDRESS [[no_unique_address]]
> #else
>diff --git a/Source/WTF/Configurations/Base.xcconfig b/Source/WTF/Configurations/Base.xcconfig
>index 5b62b7c418535d36198ee6c0ff1dc650d7482d28..88dca599019c3e03772dadaf34289c7f2fb35bd3 100644
>--- a/Source/WTF/Configurations/Base.xcconfig
>+++ b/Source/WTF/Configurations/Base.xcconfig
>@@ -33,7 +33,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_ARC = YES;
> CLANG_ENABLE_OBJC_WEAK = YES;
>diff --git a/Source/WTF/wtf/DisallowCType.h b/Source/WTF/wtf/DisallowCType.h
>index 0e3c3c14d00633ce867f7ee812d879aed61afaf7..1437e206567916f169f0cfa6a196d5713fa3b23b 100644
>--- a/Source/WTF/wtf/DisallowCType.h
>+++ b/Source/WTF/wtf/DisallowCType.h
>@@ -40,8 +40,8 @@
> // Also generates errors on wx on Windows, presumably because these functions
> // are used from wx headers. On GTK+ for Mac many GTK+ files include <libintl.h>
> // or <glib/gi18n-lib.h>, which in turn include <xlocale/_ctype.h> which uses
>-// isacii(). 
>-#if !(OS(DARWIN) && PLATFORM(GTK)) && !defined(_LIBCPP_VERSION) && defined(__GLIBC__)
>+// isacii(). Additionally, regex.h uses tolower when building the GTK port on Linux.
>+#if !PLATFORM(GTK) && !defined(_LIBCPP_VERSION) && defined(__GLIBC__)
> 
> #include <ctype.h>
> 
>diff --git a/Source/WTF/wtf/FileSystem.cpp b/Source/WTF/wtf/FileSystem.cpp
>index f6efd3e70765a95a9cd6c5bef7e59a06e5496e16..5a895155802a49b1ac81e507026eb21ffb6861a7 100644
>--- a/Source/WTF/wtf/FileSystem.cpp
>+++ b/Source/WTF/wtf/FileSystem.cpp
>@@ -48,15 +48,19 @@
> #include <wtf/StdFilesystem.h>
> #endif
> 
>-namespace WTF {
>-
>-namespace FileSystemImpl {
>+namespace WTF::FileSystemImpl {
> 
> #if HAVE(STD_FILESYSTEM) || HAVE(STD_EXPERIMENTAL_FILESYSTEM)
> 
> static std::filesystem::path toStdFileSystemPath(StringView path)
> {
>+#if HAVE(MISSING_STD_FILESYSTEM_PATH_CONSTRUCTOR)
>+    ALLOW_DEPRECATED_DECLARATIONS_BEGIN
>     return std::filesystem::u8path(path.utf8().data());
>+    ALLOW_DEPRECATED_DECLARATIONS_END
>+#else
>+    return { std::u8string(reinterpret_cast<const char8_t*>(path.utf8().data())) };
>+#endif
> }
> 
> static String fromStdFileSystemPath(const std::filesystem::path& path)
>@@ -829,5 +833,4 @@ String pathByAppendingComponents(StringView path, const Vector<StringView>& comp
> 
> #endif // HAVE(STD_FILESYSTEM) || HAVE(STD_EXPERIMENTAL_FILESYSTEM)
> 
>-} // namespace FileSystemImpl
>-} // namespace WTF
>+} // namespace WTF::FileSystemImpl
>diff --git a/Source/WTF/wtf/PlatformHave.h b/Source/WTF/wtf/PlatformHave.h
>index 1a62bbaf3ef30c3795d80c46ae153b85bcf6f1c8..44434fe4c67ba1a88a2667772ecd1cc219d5846c 100644
>--- a/Source/WTF/wtf/PlatformHave.h
>+++ b/Source/WTF/wtf/PlatformHave.h
>@@ -113,6 +113,10 @@
> #endif
> #endif
> 
>+#if (PLATFORM(MAC) && __MAC_OS_X_VERSION_MIN_REQUIRED < 120000)
>+#define HAVE_MISSING_STD_FILESYSTEM_PATH_CONSTRUCTOR 1
>+#endif
>+
> /* FIXME: Remove after CMake build enabled on Darwin */
> #if OS(DARWIN)
> #define HAVE_ERRNO_H 1
>diff --git a/Source/WTF/wtf/VectorTraits.h b/Source/WTF/wtf/VectorTraits.h
>index a6be3875ea34bf4ac03efb013b321f0c61cd0bd9..3269c561d1556dcdab8ce40e42a239c3f5af47f3 100644
>--- a/Source/WTF/wtf/VectorTraits.h
>+++ b/Source/WTF/wtf/VectorTraits.h
>@@ -56,7 +56,7 @@ namespace WTF {
>     };
> 
>     template<typename T>
>-    struct VectorTraits : VectorTraitsBase<std::is_pod<T>::value, T> { };
>+    struct VectorTraits : VectorTraitsBase<std::is_standard_layout_v<T> && std::is_trivial_v<T>, T> { };
> 
>     struct SimpleClassVectorTraits : VectorTraitsBase<false, void>
>     {
>diff --git a/Source/WTF/wtf/text/StringOperators.h b/Source/WTF/wtf/text/StringOperators.h
>index 033356f93b0172e60e26697fa20ab9ad59eabf23..2554bb4d3f2c94ca82198074cc504e40b6cf53d3 100644
>--- a/Source/WTF/wtf/text/StringOperators.h
>+++ b/Source/WTF/wtf/text/StringOperators.h
>@@ -85,7 +85,7 @@ private:
> template<typename StringType1, typename StringType2>
> class StringTypeAdapter<StringAppend<StringType1, StringType2>> {
> public:
>-    StringTypeAdapter<StringAppend<StringType1, StringType2>>(StringAppend<StringType1, StringType2>& buffer)
>+    StringTypeAdapter(StringAppend<StringType1, StringType2>& buffer)
>         : m_buffer { buffer }
>     {
>     }
>diff --git a/Source/WTF/wtf/text/WTFString.cpp b/Source/WTF/wtf/text/WTFString.cpp
>index 3a91a677d5c038e03b7c5eb32f3733befc08ca55..359fd1bb7dcea22b9b08f2fe1bc9718e6b731f00 100644
>--- a/Source/WTF/wtf/text/WTFString.cpp
>+++ b/Source/WTF/wtf/text/WTFString.cpp
>@@ -66,6 +66,11 @@ String::String(const char* characters, unsigned length)
>         m_impl = StringImpl::create(reinterpret_cast<const LChar*>(characters), length);
> }
> 
>+String::String(const char8_t* characters)
>+{
>+    *this = fromUTF8(characters);
>+}
>+
> // Construct a string with Latin-1 data, from a null-terminated source.
> String::String(const LChar* nullTerminatedString)
> {
>diff --git a/Source/WTF/wtf/text/WTFString.h b/Source/WTF/wtf/text/WTFString.h
>index 511b9c164a1a58c11d4cfd5321e32f527b4c9ed6..30600cd74ae7b94e2fcab7f55f5c04c6af2ae367 100644
>--- a/Source/WTF/wtf/text/WTFString.h
>+++ b/Source/WTF/wtf/text/WTFString.h
>@@ -84,6 +84,8 @@ public:
>     WTF_EXPORT_PRIVATE String(const LChar* characters);
>     WTF_EXPORT_PRIVATE String(const char* characters);
> 
>+    WTF_EXPORT_PRIVATE String(const char8_t*);
>+
>     // Construct a string referencing an existing StringImpl.
>     String(StringImpl&);
>     String(StringImpl*);
>@@ -307,6 +309,7 @@ public:
> 
>     // String::fromUTF8 will return a null string if
>     // the input data contains invalid UTF-8 sequences.
>+    static String fromUTF8(const char8_t* string) { return fromUTF8(reinterpret_cast<const LChar*>(string)); }
>     WTF_EXPORT_PRIVATE static String fromUTF8(const LChar*, size_t);
>     WTF_EXPORT_PRIVATE static String fromUTF8(const LChar*);
>     static String fromUTF8(const char* characters, size_t length) { return fromUTF8(reinterpret_cast<const LChar*>(characters), length); };
>diff --git a/Source/WebCore/Configurations/Base.xcconfig b/Source/WebCore/Configurations/Base.xcconfig
>index c920f3d62b720802dc68aceacb60e2a2aa19edec..33c7f6e5b75ed120431b0dc43e604077f161e2f5 100644
>--- a/Source/WebCore/Configurations/Base.xcconfig
>+++ b/Source/WebCore/Configurations/Base.xcconfig
>@@ -33,7 +33,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>diff --git a/Source/WebCore/DerivedSources.make b/Source/WebCore/DerivedSources.make
>index 49adbc24360b169eca1e3233602350964593ae62..f30720dcdf997b5738368ce54e9197fbf2ca1e8b 100644
>--- a/Source/WebCore/DerivedSources.make
>+++ b/Source/WebCore/DerivedSources.make
>@@ -46,7 +46,7 @@ endif
> FRAMEWORK_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(FRAMEWORK_SEARCH_PATHS) $(SYSTEM_FRAMEWORK_SEARCH_PATHS) | $(PERL) -e 'print "-F " . join(" -F ", split(" ", <>));')
> HEADER_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(HEADER_SEARCH_PATHS) $(SYSTEM_HEADER_SEARCH_PATHS) | $(PERL) -e 'print "-I" . join(" -I", split(" ", <>));')
> 
>-platform_h_compiler_command = $(CC) -std=gnu++1z -x c++ $(1) $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null
>+platform_h_compiler_command = $(CC) -std=gnu++2a -x c++ $(1) $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null
> 
> FEATURE_AND_PLATFORM_DEFINES := $(shell $(call platform_h_compiler_command,-E -P -dM) | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
> 
>diff --git a/Source/WebCore/PAL/Configurations/Base.xcconfig b/Source/WebCore/PAL/Configurations/Base.xcconfig
>index 7e27782f3b1d12a2b03fc8e88720c11f3e5f78f8..cf9ed724baad57983fbea9b91e6f7e6bf3c251ca 100644
>--- a/Source/WebCore/PAL/Configurations/Base.xcconfig
>+++ b/Source/WebCore/PAL/Configurations/Base.xcconfig
>@@ -33,7 +33,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>diff --git a/Source/WebCore/platform/graphics/cocoa/IOSurface.mm b/Source/WebCore/platform/graphics/cocoa/IOSurface.mm
>index 714a190a8dc3c8a0e4edd5f0597beaa9379b6713..d1dc2949f71865d4bbe6ece2b635ddcf846e8521 100644
>--- a/Source/WebCore/platform/graphics/cocoa/IOSurface.mm
>+++ b/Source/WebCore/platform/graphics/cocoa/IOSurface.mm
>@@ -315,7 +315,7 @@ CGContextRef IOSurface::ensurePlatformContext(const HostWindow* hostWindow)
>         // but for an IOSurface-to-IOSurface copy, there should be no conversion.
>         bitsPerComponent = 16;
>         bitsPerPixel = 64;
>-        bitmapInfo = kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder16Host | kCGBitmapFloatComponents;
>+        bitmapInfo = static_cast<CGBitmapInfo>(kCGImageAlphaPremultipliedLast) | static_cast<CGBitmapInfo>(kCGBitmapByteOrder16Host) | static_cast<CGBitmapInfo>(kCGBitmapFloatComponents);
>         break;
> #endif
>     case Format::YUV422:
>diff --git a/Source/WebCore/platform/ios/wak/WebCoreThread.mm b/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>index 6d7707d40c32f28429c3d324515a5cc697761bdc..eb29f258fd183e4020595ef6ad8711470c47194f 100644
>--- a/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>+++ b/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>@@ -244,12 +244,14 @@ static void HandleDelegateSource(void*)
> 
> class WebThreadDelegateMessageScope {
> public:
>+    IGNORE_CLANG_WARNINGS_BEGIN("deprecated-volatile")
>     WebThreadDelegateMessageScope() { ++webThreadDelegateMessageScopeCount; }
>     ~WebThreadDelegateMessageScope()
>     {
>         ASSERT(webThreadDelegateMessageScopeCount);
>         --webThreadDelegateMessageScopeCount;
>     }
>+    IGNORE_CLANG_WARNINGS_END
> };
> 
> static void SendDelegateMessage(RetainPtr<NSInvocation>&& invocation)
>diff --git a/Source/WebGPU/Configurations/Base.xcconfig b/Source/WebGPU/Configurations/Base.xcconfig
>index c6708e31fd42cdde531d301957678d3b84c92ec6..cfe954c048ebdbbacd3433cc4ca7f1096153df3d 100644
>--- a/Source/WebGPU/Configurations/Base.xcconfig
>+++ b/Source/WebGPU/Configurations/Base.xcconfig
>@@ -33,7 +33,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_ARC = YES;
> CLANG_ENABLE_OBJC_WEAK = YES;
>diff --git a/Source/WebInspectorUI/Configurations/Base.xcconfig b/Source/WebInspectorUI/Configurations/Base.xcconfig
>index e3ec523fd2956b0d2c310543682c653bad62e3ca..f57211dcc8eb032652625897b0b8348a8c1c3f34 100644
>--- a/Source/WebInspectorUI/Configurations/Base.xcconfig
>+++ b/Source/WebInspectorUI/Configurations/Base.xcconfig
>@@ -16,7 +16,7 @@ DEBUG_INFORMATION_FORMAT = dwarf-with-dsym;
> ALWAYS_SEARCH_USER_PATHS = NO;
> FRAMEWORK_SEARCH_PATHS = $(WK_QUOTED_OVERRIDE_FRAMEWORKS_DIR) $(SYSTEM_LIBRARY_DIR)/PrivateFrameworks $(inherited);
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>diff --git a/Source/WebKit/Configurations/Base.xcconfig b/Source/WebKit/Configurations/Base.xcconfig
>index 7556c954f4716ac4edf9ae49374bce1167dadbb3..f13c6c96793306cf8be23aca70b509e0aacbb1ba 100644
>--- a/Source/WebKit/Configurations/Base.xcconfig
>+++ b/Source/WebKit/Configurations/Base.xcconfig
>@@ -31,7 +31,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>@@ -130,7 +130,7 @@ SUPPORTS_TEXT_BASED_API[sdk=appletv*] = NO;
> SUPPORTS_TEXT_BASED_API[sdk=watch*] = NO;
> 
> OTHER_TAPI_FLAGS = $(OTHER_TAPI_FLAGS_$(WK_COCOA_TOUCH));
>-OTHER_TAPI_FLAGS_cocoatouch = -x objective-c++ -std=gnu++1z -fno-rtti -DRELEASE_WITHOUT_OPTIMIZATIONS;
>+OTHER_TAPI_FLAGS_cocoatouch = -x objective-c++ -std=gnu++2a -fno-rtti -DRELEASE_WITHOUT_OPTIMIZATIONS;
> TAPI_VERIFY_MODE[sdk=iphone*] = Pedantic;
> 
> // This is required to make LLVM_TARGET_TRIPLE_SUFFIX propagate into scripts.
>diff --git a/Source/WebKit/PlatformMac.cmake b/Source/WebKit/PlatformMac.cmake
>index 3329a8f559c0ccf54c957fd03308402817fe60ec..84aa8828dfc6a093e1d68f06580faeb5d704dbb6 100644
>--- a/Source/WebKit/PlatformMac.cmake
>+++ b/Source/WebKit/PlatformMac.cmake
>@@ -1,4 +1,4 @@
>-add_definitions("-ObjC++ -std=c++17 -D__STDC_WANT_LIB_EXT1__")
>+add_definitions("-ObjC++ -std=c++2a -D__STDC_WANT_LIB_EXT1__")
> find_library(APPLICATIONSERVICES_LIBRARY ApplicationServices)
> find_library(CARBON_LIBRARY Carbon)
> find_library(CORESERVICES_LIBRARY CoreServices)
>diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKWebViewConfiguration.mm b/Source/WebKit/UIProcess/API/Cocoa/WKWebViewConfiguration.mm
>index 5974a9c976b0f525048c0f87b1de0796a60ee2dc..cea6c44ec7f4584edf1c2088202ee89d94a3b09a 100644
>--- a/Source/WebKit/UIProcess/API/Cocoa/WKWebViewConfiguration.mm
>+++ b/Source/WebKit/UIProcess/API/Cocoa/WKWebViewConfiguration.mm
>@@ -769,9 +769,9 @@ ALLOW_DEPRECATED_DECLARATIONS_END
>     return _inlineMediaPlaybackRequiresPlaysInlineAttribute;
> }
> 
>-- (void)_setInlineMediaPlaybackRequiresPlaysInlineAttribute:(BOOL)requires
>+- (void)_setInlineMediaPlaybackRequiresPlaysInlineAttribute:(BOOL)requiresPlaysInlineAttribute
> {
>-    _inlineMediaPlaybackRequiresPlaysInlineAttribute = requires;
>+    _inlineMediaPlaybackRequiresPlaysInlineAttribute = requiresPlaysInlineAttribute;
> }
> 
> - (BOOL)_allowsInlineMediaPlaybackAfterFullscreen
>diff --git a/Source/WebKitLegacy/PlatformMac.cmake b/Source/WebKitLegacy/PlatformMac.cmake
>index 300b00b4514d35692113e7f2216abf101f62f4f3..4dd63082aae3c6cb6d6391803a11f8484d01dabf 100644
>--- a/Source/WebKitLegacy/PlatformMac.cmake
>+++ b/Source/WebKitLegacy/PlatformMac.cmake
>@@ -600,9 +600,9 @@ foreach (_file ${WebKitLegacy_SOURCES})
>     if (NOT ${_c99_index} EQUAL -1)
>         set_source_files_properties(${_file} PROPERTIES COMPILE_FLAGS -std=c99)
>     elseif (NOT ${_cpp_index} EQUAL -1)
>-        set_source_files_properties(${_file} PROPERTIES COMPILE_FLAGS -std=c++1z)
>+        set_source_files_properties(${_file} PROPERTIES COMPILE_FLAGS -std=c++2a)
>     else ()
>-        set_source_files_properties(${_file} PROPERTIES COMPILE_FLAGS "-ObjC++ -std=c++17")
>+        set_source_files_properties(${_file} PROPERTIES COMPILE_FLAGS "-ObjC++ -std=c++2a")
>     endif ()
> endforeach ()
> 
>diff --git a/Source/WebKitLegacy/mac/Configurations/Base.xcconfig b/Source/WebKitLegacy/mac/Configurations/Base.xcconfig
>index 282806aa31029eb7144528fdc4acefe46142eaf9..5fe9da2debbb4b280897e17a32c28d4f3dc8d2eb 100644
>--- a/Source/WebKitLegacy/mac/Configurations/Base.xcconfig
>+++ b/Source/WebKitLegacy/mac/Configurations/Base.xcconfig
>@@ -33,7 +33,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>diff --git a/Source/WebKitLegacy/mac/Configurations/WebKitLegacy.xcconfig b/Source/WebKitLegacy/mac/Configurations/WebKitLegacy.xcconfig
>index 2f836f88830ab7e030e9e9456fb47c1b827198aa..0a0b11fa13ac563375e64b884fbd5caf6fb918ae 100644
>--- a/Source/WebKitLegacy/mac/Configurations/WebKitLegacy.xcconfig
>+++ b/Source/WebKitLegacy/mac/Configurations/WebKitLegacy.xcconfig
>@@ -161,7 +161,7 @@ WK_INSTALL_PATH_PREFIX_DEPLOYMENT_YES_MACOS_SINCE_1015_USE_STAGING_INSTALL_PATH_
> SUPPORTS_TEXT_BASED_API[sdk=iphone*] = YES;
> SUPPORTS_TEXT_BASED_API[sdk=appletv*] = NO;
> SUPPORTS_TEXT_BASED_API[sdk=watch*] = NO;
>-OTHER_TAPI_FLAGS[sdk=iphone*] = -x objective-c++ -std=gnu++1z -fno-rtti $(WK_CFLAGS_BUILD_FOR_TESTING_$(WK_BUILD_FOR_TESTING)) -DRELEASE_WITHOUT_OPTIMIZATIONS -exclude-private-header $(BUILT_PRODUCTS_DIR)/$(PRIVATE_HEADERS_FOLDER_PATH)/NSURLDownloadSPI.h -extra-private-header $(SOURCE_ROOT)/mac/TestingFunctions.h;
>+OTHER_TAPI_FLAGS[sdk=iphone*] = -x objective-c++ -std=gnu++2a -fno-rtti $(WK_CFLAGS_BUILD_FOR_TESTING_$(WK_BUILD_FOR_TESTING)) -DRELEASE_WITHOUT_OPTIMIZATIONS -exclude-private-header $(BUILT_PRODUCTS_DIR)/$(PRIVATE_HEADERS_FOLDER_PATH)/NSURLDownloadSPI.h -extra-private-header $(SOURCE_ROOT)/mac/TestingFunctions.h;
> TAPI_VERIFY_MODE[sdk=iphone*] = Pedantic;
> 
> DEFINES_MODULE = $(DEFINES_MODULE_COCOA_TOUCH_$(WK_IS_COCOA_TOUCH));
>diff --git a/Source/WebKitLegacy/mac/MigrateHeaders.make b/Source/WebKitLegacy/mac/MigrateHeaders.make
>index 312b4cc0263a3e0026c7a3a462f7b80724518839..65bb73df3726ffe72f672e0c12dd291fdde9221a 100644
>--- a/Source/WebKitLegacy/mac/MigrateHeaders.make
>+++ b/Source/WebKitLegacy/mac/MigrateHeaders.make
>@@ -38,7 +38,7 @@ endif
> 
> FRAMEWORK_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(FRAMEWORK_SEARCH_PATHS) $(SYSTEM_FRAMEWORK_SEARCH_PATHS) | $(PERL) -e 'print "-F " . join(" -F ", split(" ", <>));')
> HEADER_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(HEADER_SEARCH_PATHS) $(SYSTEM_HEADER_SEARCH_PATHS) | $(PERL) -e 'print "-I" . join(" -I", split(" ", <>));')
>-FEATURE_AND_PLATFORM_DEFINES := $(shell $(CC) -std=gnu++1z -x c++ -E -P -dM $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
>+FEATURE_AND_PLATFORM_DEFINES := $(shell $(CC) -std=gnu++2a -x c++ -E -P -dM $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
> 
> # --------
> 
>diff --git a/Source/bmalloc/Configurations/Base.xcconfig b/Source/bmalloc/Configurations/Base.xcconfig
>index ae1abf76864d3557c0221873725df1b558cd59a5..7de4267ce79e13be1eed6aa203d284bfc8df6ad5 100644
>--- a/Source/bmalloc/Configurations/Base.xcconfig
>+++ b/Source/bmalloc/Configurations/Base.xcconfig
>@@ -31,7 +31,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_ARC = YES;
> CLANG_ENABLE_OBJC_WEAK = YES;
>diff --git a/Source/cmake/OptionsCommon.cmake b/Source/cmake/OptionsCommon.cmake
>index 6c40f238ab77dcdbad157047d1864f5459f6203c..710b0d7f011bf7740cacead70842b46443711d61 100644
>--- a/Source/cmake/OptionsCommon.cmake
>+++ b/Source/cmake/OptionsCommon.cmake
>@@ -1,4 +1,4 @@
>-set(CMAKE_CXX_STANDARD 17)
>+set(CMAKE_CXX_STANDARD 20)
> set(CMAKE_CXX_STANDARD_REQUIRED ON)
> set(CMAKE_CXX_EXTENSIONS OFF)
> 
>diff --git a/Source/cmake/WebKitCompilerFlags.cmake b/Source/cmake/WebKitCompilerFlags.cmake
>index ba5a98b742ee971710396b5e7eed5c196bcdd740..c4c7fb4bcfbc6d227fc1d111ac5dceeb27dee2a9 100644
>--- a/Source/cmake/WebKitCompilerFlags.cmake
>+++ b/Source/cmake/WebKitCompilerFlags.cmake
>@@ -383,7 +383,7 @@ int main() {
>         #include <filesystem>
>         int main() { std::filesystem::path p1(\"\"); std::filesystem::status(p1); }
>     ")
>-    set(CMAKE_REQUIRED_FLAGS "--std=c++17")
>+    set(CMAKE_REQUIRED_FLAGS "--std=c++2a")
>     check_cxx_source_compiles("${FILESYSTEM_TEST_SOURCE}" STD_FILESYSTEM_IS_AVAILABLE)
>     if (NOT STD_FILESYSTEM_IS_AVAILABLE)
>         set(EXPERIMENTAL_FILESYSTEM_TEST_SOURCE "
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 4200cccf5d20812fce9c119a72ebf08453bbdd1a..674cb14cb1379cd8995630384a78fb393a0b8c09 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,20 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * DumpRenderTree/DerivedSources.make:
>+        * DumpRenderTree/mac/Configurations/Base.xcconfig:
>+        * MiniBrowser/Configurations/Base.xcconfig:
>+        * MobileMiniBrowser/Configurations/Base.xcconfig:
>+        * TestWebKitAPI/Configurations/Base.xcconfig:
>+        * TestWebKitAPI/Tests/WTF/Expected.cpp:
>+        (TestWebKitAPI::NonCopyable::NonCopyable):
>+        * WebKitTestRunner/Configurations/Base.xcconfig:
>+        * WebKitTestRunner/DerivedSources.make:
>+
> 2022-01-05  Jonathan Bedard  <jbedard@apple.com>
> 
>         Running layout tests sometimes throws an AssertionError in python2.7/multiprocessing
>diff --git a/Tools/DumpRenderTree/DerivedSources.make b/Tools/DumpRenderTree/DerivedSources.make
>index 7bce67faa19895fd86f90cf6a48b8ee14d6ecee5..dcce26564d0d973b24a188b449de7b4bcd8cb91a 100644
>--- a/Tools/DumpRenderTree/DerivedSources.make
>+++ b/Tools/DumpRenderTree/DerivedSources.make
>@@ -35,7 +35,7 @@ endif
> 
> FRAMEWORK_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(FRAMEWORK_SEARCH_PATHS) $(SYSTEM_FRAMEWORK_SEARCH_PATHS) | $(PERL) -e 'print "-F " . join(" -F ", split(" ", <>));')
> HEADER_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(HEADER_SEARCH_PATHS) $(SYSTEM_HEADER_SEARCH_PATHS) | $(PERL) -e 'print "-I" . join(" -I", split(" ", <>));')
>-FEATURE_AND_PLATFORM_DEFINES := $(shell $(CC) -std=gnu++1z -x c++ -E -P -dM $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
>+FEATURE_AND_PLATFORM_DEFINES := $(shell $(CC) -std=gnu++2a -x c++ -E -P -dM $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
> 
> # FIXME: This should list Platform.h and all the things it includes. Could do that by using the -MD flag in the CC line above.
> FEATURE_AND_PLATFORM_DEFINE_DEPENDENCIES = $(DumpRenderTree)/DerivedSources.make
>diff --git a/Tools/DumpRenderTree/mac/Configurations/Base.xcconfig b/Tools/DumpRenderTree/mac/Configurations/Base.xcconfig
>index b446985d91223d666c67a403b58175c807c521d0..ba9762bd04d94167fb534706f5eea177034d62bb 100644
>--- a/Tools/DumpRenderTree/mac/Configurations/Base.xcconfig
>+++ b/Tools/DumpRenderTree/mac/Configurations/Base.xcconfig
>@@ -41,7 +41,7 @@ WK_PRIVATE_FRAMEWORKS_DIR_[sdk=watch*] = $(PROJECT_DIR)/../../WebKitLibraries/We
> 
> FRAMEWORK_SEARCH_PATHS = $(WK_PRIVATE_FRAMEWORKS_DIR);
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_CXX0X_EXTENSIONS = NO;
>diff --git a/Tools/MiniBrowser/Configurations/Base.xcconfig b/Tools/MiniBrowser/Configurations/Base.xcconfig
>index 40f7d407a1700f5bf794b42a5b49e53044cf1315..1205bf56ba9ad8115630892802d0ef4f0e687904 100644
>--- a/Tools/MiniBrowser/Configurations/Base.xcconfig
>+++ b/Tools/MiniBrowser/Configurations/Base.xcconfig
>@@ -31,7 +31,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> GCC_PREPROCESSOR_DEFINITIONS = DISABLE_LEGACY_WEBKIT_DEPRECATIONS $(inherited);
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> DEBUG_INFORMATION_FORMAT = dwarf-with-dsym;
>diff --git a/Tools/MobileMiniBrowser/Configurations/Base.xcconfig b/Tools/MobileMiniBrowser/Configurations/Base.xcconfig
>index ca09e0f3811bb66282d30f97b88262a7e2ab5735..4cb4d2e544878660ac2e92998e3c96ab70db7132 100644
>--- a/Tools/MobileMiniBrowser/Configurations/Base.xcconfig
>+++ b/Tools/MobileMiniBrowser/Configurations/Base.xcconfig
>@@ -31,7 +31,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> CLANG_ANALYZER_NONNULL = YES;
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_MODULES = YES;
> CLANG_ENABLE_OBJC_ARC = YES;
>diff --git a/Tools/TestWebKitAPI/Configurations/Base.xcconfig b/Tools/TestWebKitAPI/Configurations/Base.xcconfig
>index 0fd8397353be0a56bbbb2186aa2a28ad3ace9593..e7a197f5f36f104a05af71dbd9013252d433c207 100644
>--- a/Tools/TestWebKitAPI/Configurations/Base.xcconfig
>+++ b/Tools/TestWebKitAPI/Configurations/Base.xcconfig
>@@ -29,7 +29,7 @@ USE_INTERNAL_SDK_Production = YES;
> USE_INTERNAL_SDK_Debug = $(HAVE_INTERNAL_SDK);
> USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_CXX0X_EXTENSIONS = NO;
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/Expected.cpp b/Tools/TestWebKitAPI/Tests/WTF/Expected.cpp
>index 2a06f8ba5ca9feb492a3522c5c6550138d2237e5..8bb07fc27eb0b67e9100fa5e3a77adb9d2b801d8 100644
>--- a/Tools/TestWebKitAPI/Tests/WTF/Expected.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WTF/Expected.cpp
>@@ -291,6 +291,8 @@ TEST(WTF_Expected, void)
> 
> template<typename T>
> struct NonCopyable {
>+    NonCopyable(T&& t)
>+        : value(std::forward<T>(t)) { }
>     NonCopyable(NonCopyable&&) = default;
>     NonCopyable(const NonCopyable&) = delete;
>     NonCopyable& operator=(const NonCopyable&) = delete;
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/URLParser.cpp b/Tools/TestWebKitAPI/Tests/WTF/URLParser.cpp
>index b0469d70957644100fb771b95cc8272e28ddecce..ee2c4b8a931468d29e627331f2c8f6e765c88949 100644
>--- a/Tools/TestWebKitAPI/Tests/WTF/URLParser.cpp
>+++ b/Tools/TestWebKitAPI/Tests/WTF/URLParser.cpp
>@@ -1076,13 +1076,13 @@ TEST_F(WTF_URLParser, ParserDifferences)
>     checkURL("a://A", {"a", "", "", "A", 0, "", "", "", "a://A"});
>     checkURL("a://A:2", {"a", "", "", "A", 2, "", "", "", "a://A:2"});
>     checkURL("a://A:2/", {"a", "", "", "A", 2, "/", "", "", "a://A:2/"});
>-    checkURLDifferences(u8"asd://Ã",
>+    checkURLDifferences(reinterpret_cast<const char*>(u8"asd://Ã"),
>         {"asd", "", "", "%C3%83%C2%9F", 0, "", "", "", "asd://%C3%83%C2%9F"},
>         {"", "", "", "", 0, "", "", "", "about:blank"}, TestTabs::No);
>-    checkURLDifferences(u8"asd://Ã:4",
>+    checkURLDifferences(reinterpret_cast<const char*>(u8"asd://Ã:4"),
>         {"asd", "", "", "%C3%83%C2%9F", 4, "", "", "", "asd://%C3%83%C2%9F:4"},
>         {"", "", "", "", 0, "", "", "", "about:blank"}, TestTabs::No);
>-    checkURLDifferences(u8"asd://Ã:4/",
>+    checkURLDifferences(reinterpret_cast<const char*>(u8"asd://Ã:4/"),
>         {"asd", "", "", "%C3%83%C2%9F", 4, "/", "", "", "asd://%C3%83%C2%9F:4/"},
>         {"", "", "", "", 0, "", "", "", "about:blank"}, TestTabs::No);
>     checkURLDifferences("a://[A::b]:4",
>diff --git a/Tools/WebKitTestRunner/Configurations/Base.xcconfig b/Tools/WebKitTestRunner/Configurations/Base.xcconfig
>index e309e011ed89a24066a2041098f8aecb34fb039b..1331ca2a49de4eb817f814822ac09068f5f1846a 100644
>--- a/Tools/WebKitTestRunner/Configurations/Base.xcconfig
>+++ b/Tools/WebKitTestRunner/Configurations/Base.xcconfig
>@@ -29,7 +29,7 @@ USE_INTERNAL_SDK_Production = YES;
> USE_INTERNAL_SDK_Debug = $(HAVE_INTERNAL_SDK);
> USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++1z;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> ENABLE_STRICT_OBJC_MSGSEND = YES;
>diff --git a/Tools/WebKitTestRunner/DerivedSources.make b/Tools/WebKitTestRunner/DerivedSources.make
>index 74c48e00f56c1bdc37bdd78488522ef593b5b14a..ebb0089aca2357fc7eaaa7d110c924b0b4cb095d 100644
>--- a/Tools/WebKitTestRunner/DerivedSources.make
>+++ b/Tools/WebKitTestRunner/DerivedSources.make
>@@ -40,7 +40,7 @@ endif
> 
> FRAMEWORK_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(FRAMEWORK_SEARCH_PATHS) $(SYSTEM_FRAMEWORK_SEARCH_PATHS) | $(PERL) -e 'print "-F " . join(" -F ", split(" ", <>));')
> HEADER_FLAGS := $(shell echo $(BUILT_PRODUCTS_DIR) $(HEADER_SEARCH_PATHS) $(SYSTEM_HEADER_SEARCH_PATHS) | $(PERL) -e 'print "-I" . join(" -I", split(" ", <>));')
>-FEATURE_AND_PLATFORM_DEFINES := $(shell $(CC) -std=gnu++1z -x c++ -E -P -dM $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
>+FEATURE_AND_PLATFORM_DEFINES := $(shell $(CC) -std=gnu++2a -x c++ -E -P -dM $(SDK_FLAGS) $(TARGET_TRIPLE_FLAGS) $(FRAMEWORK_FLAGS) $(HEADER_FLAGS) -include "wtf/Platform.h" /dev/null | $(PERL) -ne "print if s/\#define ((HAVE_|USE_|ENABLE_|WTF_PLATFORM_)\w+) 1/\1/")
> 
> # FIXME: This should list Platform.h and all the things it includes. Could do that by using the -MD flag in the CC line above.
> FEATURE_AND_PLATFORM_DEFINE_DEPENDENCIES = $(WebKitTestRunner)/DerivedSources.make
>diff --git a/Tools/lldb/lldbWebKitTester/Configurations/Base.xcconfig b/Tools/lldb/lldbWebKitTester/Configurations/Base.xcconfig
>index 5bdf0cbd2ca8727b060af7ece767098d1593b2ed..6d420dfad5543099178d3da378b6cf6bba03383a 100644
>--- a/Tools/lldb/lldbWebKitTester/Configurations/Base.xcconfig
>+++ b/Tools/lldb/lldbWebKitTester/Configurations/Base.xcconfig
>@@ -31,7 +31,7 @@ USE_INTERNAL_SDK_Release = $(HAVE_INTERNAL_SDK);
> 
> ALWAYS_SEARCH_USER_PATHS = NO;
> 
>-CLANG_CXX_LANGUAGE_STANDARD = gnu++17;
>+CLANG_CXX_LANGUAGE_STANDARD = gnu++2a;
> CLANG_CXX_LIBRARY = libc++;
> CLANG_ENABLE_OBJC_WEAK = YES;
> CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
>diff --git a/ChangeLog b/ChangeLog
>index 04f8d9bc32d3e3345e9aa8e093b8ade7e4f341ab..e7248300e409f404c54972d8cb736e91ac78674f 100644
>--- a/ChangeLog
>+++ b/ChangeLog
>@@ -1,3 +1,12 @@
>+2022-01-05  Alex Christensen  <achristensen@webkit.org>
>+
>+        Start using C++20
>+        https://bugs.webkit.org/show_bug.cgi?id=233963
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Source/cmake/WebKitCompilerFlags.cmake:
>+
> 2022-01-04  Fujii Hironori  <Hironori.Fujii@sony.com>
> 
>         clang-format: Change SpaceAfterTemplateKeyword to false

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Attachments on bug 233963: 446264 | 446640 | 446666 | 446745 | 446764 | 447747 | 447754 | 448438 | 448456 | 448471 | 448474 | 448475 | 448476 | 448477 | 448478 | 448624