Move libcxx to //flutter/third_party (#52773)

Fixes flutter/flutter#144202

Author: jason-simmons

DEPS

@@ -277,7 +277,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + '7840a4af027fc21161d4ae14a3d4d9c9bab049a2',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + '7f832aed9b02b6da55756234b85e753d0411855e',
 
   'src/flutter/third_party/depot_tools':
   Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '580b4ff3f5cd0dcaa2eacda28cefe0f45320e8f7',
@@ -288,10 +288,10 @@ deps = {
   'src/flutter/third_party/harfbuzz':
    Var('flutter_git') + '/third_party/harfbuzz' + '@' + 'ea8f97c615f0ba17dc25013ef67dbd6bfaaa76f2',
 
-  'src/third_party/libcxx':
+  'src/flutter/third_party/libcxx':
    Var('llvm_git') + '/llvm-project/libcxx' + '@' + '44079a4cc04cdeffb9cfe8067bfb3c276fb2bab0',
 
-  'src/third_party/libcxxabi':
+  'src/flutter/third_party/libcxxabi':
    Var('llvm_git') + '/llvm-project/libcxxabi' + '@' + '2ce528fb5e0f92e57c97ec3ff53b75359d33af12',
 
   'src/flutter/third_party/glfw':

build/secondary/third_party/libcxx/BUILD.gn renamed to build/secondary/flutter/third_party/libcxx/BUILD.gn

@@ -4,7 +4,7 @@
 
 config("libcxx_config") {
   defines = [ "_LIBCPP_DISABLE_AVAILABILITY=1" ]
-  include_dirs = [ "//flutter/build/secondary/third_party/libcxx/config" ]
+  include_dirs = [ "//flutter/build/secondary/flutter/third_party/libcxx/config" ]
 }
 
 config("src_include") {
@@ -56,7 +56,7 @@ source_set("libcxx") {
     "src/vector.cpp",
   ]
 
-  deps = [ "//third_party/libcxxabi" ]
+  deps = [ "//flutter/third_party/libcxxabi" ]
 
   # TODO(goderbauer): remove when all sources build with LTO for android_arm64 and android_x64.
   if (is_android && (current_cpu == "arm64" || current_cpu == "x64")) {
@@ -66,7 +66,7 @@ source_set("libcxx") {
 
   public_configs = [
     ":libcxx_config",
-    "//third_party/libcxxabi:libcxxabi_config",
+    "//flutter/third_party/libcxxabi:libcxxabi_config",
   ]
 
   defines = [
@@ -101,11 +101,11 @@ source_set("libcxx_nolto") {
 
   cflags_cc = [ "-fno-lto" ]
 
-  deps = [ "//third_party/libcxxabi" ]
+  deps = [ "//flutter/third_party/libcxxabi" ]
 
   public_configs = [
     ":libcxx_config",
-    "//third_party/libcxxabi:libcxxabi_config",
+    "//flutter/third_party/libcxxabi:libcxxabi_config",
   ]
 
   defines = [

build/secondary/third_party/libcxx/config/__config_site renamed to build/secondary/flutter/third_party/libcxx/config/__config_site

@@ -38,7 +38,7 @@ source_set("libcxxabi") {
   configs -= [ "//build/config/compiler:cxx_version_default" ]
   configs += [ "//build/config/compiler:cxx_version_20" ]
 
-  configs += [ "//third_party/libcxx:src_include" ]
+  configs += [ "//flutter/third_party/libcxx:src_include" ]
 
   # No translation units in the engine are built with exceptions. But, using
   # Objective-C exceptions requires some infrastructure setup for exceptions.

build/secondary/third_party/libcxxabi/BUILD.gn renamed to build/secondary/flutter/third_party/libcxxabi/BUILD.gn

@@ -174,7 +174,7 @@ function verify_licenses() (
 
   local actualLicenseCount
   actualLicenseCount="$(tail -n 1 flutter/ci/licenses_golden/licenses_flutter | tr -dc '0-9')"
-  local expectedLicenseCount=899 # When changing this number: Update the error message below as well describing the newly expected license types.
+  local expectedLicenseCount=903 # When changing this number: Update the error message below as well describing the newly expected license types.
 
   if [[ $actualLicenseCount -ne $expectedLicenseCount ]]; then
     echo "=============================== ERROR ==============================="

ci/licenses.sh

@@ -2093,6 +2093,41 @@
 ../../../flutter/third_party/json/tools/serve_header/README.md
 ../../../flutter/third_party/json/tools/serve_header/requirements.txt
 ../../../flutter/third_party/json/tools/serve_header/serve_header.py
+../../../flutter/third_party/libcxx/.clang-format
+../../../flutter/third_party/libcxx/.clang-tidy
+../../../flutter/third_party/libcxx/.git
+../../../flutter/third_party/libcxx/.gitignore
+../../../flutter/third_party/libcxx/CMakeLists.txt
+../../../flutter/third_party/libcxx/CREDITS.TXT
+../../../flutter/third_party/libcxx/TODO.TXT
+../../../flutter/third_party/libcxx/appveyor-reqs-install.cmd
+../../../flutter/third_party/libcxx/appveyor.yml
+../../../flutter/third_party/libcxx/benchmarks
+../../../flutter/third_party/libcxx/cmake
+../../../flutter/third_party/libcxx/docs
+../../../flutter/third_party/libcxx/include/CMakeLists.txt
+../../../flutter/third_party/libcxx/include/version
+../../../flutter/third_party/libcxx/lib/abi/CHANGELOG.TXT
+../../../flutter/third_party/libcxx/lib/abi/CMakeLists.txt
+../../../flutter/third_party/libcxx/lib/abi/README.TXT
+../../../flutter/third_party/libcxx/src/CMakeLists.txt
+../../../flutter/third_party/libcxx/src/ryu/README.txt
+../../../flutter/third_party/libcxx/src/support/solaris
+../../../flutter/third_party/libcxx/test
+../../../flutter/third_party/libcxx/utils
+../../../flutter/third_party/libcxxabi/.clang-format
+../../../flutter/third_party/libcxxabi/.git
+../../../flutter/third_party/libcxxabi/.gitignore
+../../../flutter/third_party/libcxxabi/CMakeLists.txt
+../../../flutter/third_party/libcxxabi/CREDITS.TXT
+../../../flutter/third_party/libcxxabi/cmake
+../../../flutter/third_party/libcxxabi/fuzz/CMakeLists.txt
+../../../flutter/third_party/libcxxabi/include/CMakeLists.txt
+../../../flutter/third_party/libcxxabi/src/CMakeLists.txt
+../../../flutter/third_party/libcxxabi/src/demangle/.clang-format
+../../../flutter/third_party/libcxxabi/src/demangle/README.txt
+../../../flutter/third_party/libcxxabi/test
+../../../flutter/third_party/libcxxabi/www
 ../../../flutter/third_party/libjpeg-turbo/src/.git
 ../../../flutter/third_party/libjpeg-turbo/src/.gitignore
 ../../../flutter/third_party/libjpeg-turbo/src/BUILDING.md
@@ -3509,43 +3544,5 @@
 ../../../fuchsia/sdk/linux/tools
 ../../../fuchsia/sdk/linux/version_history.json
 ../../../out
-../../../third_party/android_embedding_dependencies
-../../../third_party/gradle
-../../../third_party/java
-../../../third_party/libcxx/.clang-format
-../../../third_party/libcxx/.clang-tidy
-../../../third_party/libcxx/.git
-../../../third_party/libcxx/.gitignore
-../../../third_party/libcxx/CMakeLists.txt
-../../../third_party/libcxx/CREDITS.TXT
-../../../third_party/libcxx/TODO.TXT
-../../../third_party/libcxx/appveyor-reqs-install.cmd
-../../../third_party/libcxx/appveyor.yml
-../../../third_party/libcxx/benchmarks
-../../../third_party/libcxx/cmake
-../../../third_party/libcxx/docs
-../../../third_party/libcxx/include/CMakeLists.txt
-../../../third_party/libcxx/include/version
-../../../third_party/libcxx/lib/abi/CHANGELOG.TXT
-../../../third_party/libcxx/lib/abi/CMakeLists.txt
-../../../third_party/libcxx/lib/abi/README.TXT
-../../../third_party/libcxx/src/CMakeLists.txt
-../../../third_party/libcxx/src/ryu/README.txt
-../../../third_party/libcxx/src/support/solaris
-../../../third_party/libcxx/test
-../../../third_party/libcxx/utils
-../../../third_party/libcxxabi/.clang-format
-../../../third_party/libcxxabi/.git
-../../../third_party/libcxxabi/.gitignore
-../../../third_party/libcxxabi/CMakeLists.txt
-../../../third_party/libcxxabi/CREDITS.TXT
-../../../third_party/libcxxabi/cmake
-../../../third_party/libcxxabi/fuzz/CMakeLists.txt
-../../../third_party/libcxxabi/include/CMakeLists.txt
-../../../third_party/libcxxabi/src/CMakeLists.txt
-../../../third_party/libcxxabi/src/demangle/.clang-format
-../../../third_party/libcxxabi/src/demangle/README.txt
-../../../third_party/libcxxabi/test
-../../../third_party/libcxxabi/www
-../../../third_party/web_dependencies/canvaskit
+../../../third_party
 ../../../tools