I would like to publish this diff before I lost ti in any dusty
folder. This diff removes all dirty qtwebengine+pre-libcxx19
hacks.

diff --git a/x11/qt6/qtwebengine/Makefile b/x11/qt6/qtwebengine/Makefile
index d0c6a18921b..18bcbef1f00 100644
--- a/x11/qt6/qtwebengine/Makefile
+++ b/x11/qt6/qtwebengine/Makefile
@@ -159,9 +159,6 @@ post-patch:
 		${CHROMESRC}/v8/tools/run.py \
 		${CHROMESRC}/tools/protoc_wrapper/protoc_wrapper.py \
 		${CHROMESRC}/third_party/blink/renderer/build/scripts/run_with_pythonpath.py
-	# FIXME if we update base libcxx
-	cp /usr/include/c++/v1/__config_site \
-		${CHROMESRC}/third_party/libc++/src/include/__config_site
 
 pre-configure:
 	cd ${CHROMESRC}/third_party/ffmpeg && \
diff --git a/x11/qt6/qtwebengine/patches/patch-cmake_Functions_cmake b/x11/qt6/qtwebengine/patches/patch-cmake_Functions_cmake
index 3e09fc9e260..cb19481cb43 100644
--- a/x11/qt6/qtwebengine/patches/patch-cmake_Functions_cmake
+++ b/x11/qt6/qtwebengine/patches/patch-cmake_Functions_cmake
@@ -27,17 +27,7 @@ Index: cmake/Functions.cmake
          init_stack_vars=false
          is_component_build=false
          is_shared=true
-@@ -826,7 +827,8 @@ macro(append_build_type_setup)
-         use_allocator_shim=false
-         use_partition_alloc=true
-         use_partition_alloc_as_malloc=false
--        use_custom_libcxx=false
-+        use_custom_libcxx=true
-+        use_custom_libunwind=true
-         enable_rust=false # We do not yet support rust
-     )
-     if(${config} STREQUAL "Debug")
-@@ -879,7 +881,7 @@ macro(append_build_type_setup)
+@@ -879,7 +880,7 @@ macro(append_build_type_setup)
  
      extend_gn_list(gnArgArg
          ARGS enable_precompiled_headers
@@ -46,7 +36,7 @@ Index: cmake/Functions.cmake
      )
      extend_gn_list(gnArgArg
          ARGS dcheck_always_on
-@@ -962,7 +964,7 @@ macro(append_compiler_linker_sdk_setup)
+@@ -962,7 +963,7 @@ macro(append_compiler_linker_sdk_setup)
                  use_libcxx=true
              )
          endif()
@@ -55,7 +45,7 @@ Index: cmake/Functions.cmake
              extend_gn_list(gnArgArg ARGS use_libcxx
                  CONDITION QT_FEATURE_stdlib_libcpp
              )
-@@ -1000,7 +1002,7 @@ macro(append_compiler_linker_sdk_setup)
+@@ -1000,7 +1001,7 @@ macro(append_compiler_linker_sdk_setup)
          )
      endif()
      get_gn_arch(cpu ${TEST_architecture_arch})
@@ -64,7 +54,7 @@ Index: cmake/Functions.cmake
  
          extend_gn_list_cflag(gnArgArg
              ARG arm_tune
-@@ -1090,7 +1092,7 @@ macro(append_toolchain_setup)
+@@ -1090,7 +1091,7 @@ macro(append_toolchain_setup)
                  host_cpu="${cpu}"
              )
          endif()
@@ -73,7 +63,7 @@ Index: cmake/Functions.cmake
          get_gn_arch(cpu ${TEST_architecture_arch})
          list(APPEND gnArgArg
              custom_toolchain="${buildDir}/target_toolchain:target"
-@@ -1229,6 +1231,20 @@ function(add_gn_build_artifacts_to_target)
+@@ -1229,6 +1230,20 @@ function(add_gn_build_artifacts_to_target)
              set_target_properties(${arg_CMAKE_TARGET} PROPERTIES
                  LINK_DEPENDS ${arg_BUILDDIR}/${config}/${arch}/${arg_NINJA_STAMP}
              )
@@ -94,7 +84,7 @@ Index: cmake/Functions.cmake
              if(QT_IS_MACOS_UNIVERSAL)
                  add_intermediate_archive(${target} ${arg_BUILDDIR}/${config}/${arch} ${arg_COMPLETE_STATIC})
              elseif(IOS)
-@@ -1355,7 +1371,7 @@ endfunction()
+@@ -1355,7 +1370,7 @@ endfunction()
  
  function(check_for_ulimit)
      message("-- Checking 'ulimit -n'")
@@ -103,7 +93,7 @@ Index: cmake/Functions.cmake
          OUTPUT_VARIABLE ulimitOutput
      )
      string(REGEX MATCHALL "[0-9]+" limit "${ulimitOutput}")
-@@ -1364,7 +1380,7 @@ function(check_for_ulimit)
+@@ -1364,7 +1379,7 @@ function(check_for_ulimit)
          if(NOT ${CMAKE_VERSION} VERSION_LESS "3.21.0")
              message(" -- Creating linker launcher")
              file(GENERATE OUTPUT ${PROJECT_BINARY_DIR}/linker_ulimit.sh
diff --git a/x11/qt6/qtwebengine/patches/patch-src_3rdparty_chromium_buildtools_third_party_libc++_BUILD_gn b/x11/qt6/qtwebengine/patches/patch-src_3rdparty_chromium_buildtools_third_party_libc++_BUILD_gn
deleted file mode 100644
index 1487c06a8d0..00000000000
--- a/x11/qt6/qtwebengine/patches/patch-src_3rdparty_chromium_buildtools_third_party_libc++_BUILD_gn
+++ /dev/null
@@ -1,18 +0,0 @@
-Index: src/3rdparty/chromium/buildtools/third_party/libc++/BUILD.gn
---- src/3rdparty/chromium/buildtools/third_party/libc++/BUILD.gn.orig
-+++ src/3rdparty/chromium/buildtools/third_party/libc++/BUILD.gn
-@@ -69,10 +69,10 @@ target(_libcxx_target_type, "libc++") {
-     libs = [ "atomic" ]
-   }
- 
--  inputs = [
--    "__assertion_handler",
--    "__config_site",
--  ]
-+  #inputs = [
-+  #  "__assertion_handler",
-+  #  "__config_site",
-+  #]
- 
-   # TODO(crbug.com/1458042): Move this build file to third_party/libc++/BUILD.gn once submodule migration is done
-   sources = [
diff --git a/x11/qt6/qtwebengine/patches/patch-src_3rdparty_chromium_third_party_libc++_src_include___assert b/x11/qt6/qtwebengine/patches/patch-src_3rdparty_chromium_third_party_libc++_src_include___assert
deleted file mode 100644
index f8e57debb3c..00000000000
--- a/x11/qt6/qtwebengine/patches/patch-src_3rdparty_chromium_third_party_libc++_src_include___assert
+++ /dev/null
@@ -1,19 +0,0 @@
-Index: src/3rdparty/chromium/third_party/libc++/src/include/__assert
---- src/3rdparty/chromium/third_party/libc++/src/include/__assert.orig
-+++ src/3rdparty/chromium/third_party/libc++/src/include/__assert
-@@ -10,12 +10,14 @@
- #ifndef _LIBCPP___ASSERT
- #define _LIBCPP___ASSERT
- 
--#include <__assertion_handler> // Note: this include is generated by CMake and is potentially vendor-provided.
- #include <__config>
-+#include <__verbose_abort>
- 
- #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
- #  pragma GCC system_header
- #endif
-+
-+#define _LIBCPP_ASSERTION_HANDLER(message) _LIBCPP_VERBOSE_ABORT("%s", message)
- 
- #define _LIBCPP_ASSERT(expression, message)                                                                            \
-   (__builtin_expect(static_cast<bool>(expression), 1)                                                                  \