LibLocale: Install ICU package and link into LibLocale

Rather than removing LibLocale entirely, we will use it as a wrapper
around ICU (which has some C-like interfaces, and uses UTF-16 for its
string types). Using ICU will provide better web compatibility overall,
and will let us implement features we were previously unable to (e.g.
Intl.Collator requires data that is not in the JSON export of the CLDR).

.github/actions/setup/action.yml

@@ -29,7 +29,7 @@ runs:
         sudo add-apt-repository ppa:ubuntu-toolchain-r/test
 
         sudo apt-get update
-        sudo apt-get install ccache clang-18 clang++-18 clang-format-18 lld-18 gcc-13 g++-13 libstdc++-13-dev ninja-build unzip qt6-base-dev qt6-tools-dev-tools libqt6svg6-dev qt6-multimedia-dev libgl1-mesa-dev libpulse-dev libssl-dev libegl1-mesa-dev
+        sudo apt-get install autoconf autoconf-archive automake ccache clang-18 clang++-18 clang-format-18 lld-18 gcc-13 g++-13 libstdc++-13-dev ninja-build unzip qt6-base-dev qt6-tools-dev-tools libqt6svg6-dev qt6-multimedia-dev libgl1-mesa-dev libpulse-dev libssl-dev libegl1-mesa-dev
 
         sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-18 100
         sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-18 100
@@ -59,7 +59,7 @@ runs:
       run: |
         set -e
         brew update
-        brew install coreutils bash ninja wabt ccache unzip qt llvm@18
+        brew install autoconf autoconf-archive automake coreutils bash ninja wabt ccache unzip qt llvm@18
 
     - name: 'Install vcpkg'
       shell: bash

Documentation/BuildInstructionsLadybird.md

@@ -9,7 +9,7 @@ NOTE: In all of the below lists of packages, the Qt6 multimedia package is not n
 On Debian/Ubuntu required packages include, but are not limited to:
 
 ```
-sudo apt install build-essential cmake libgl1-mesa-dev ninja-build qt6-base-dev qt6-tools-dev-tools qt6-multimedia-dev ccache fonts-liberation2 zip unzip curl tar
+sudo apt install autoconf autoconf-archive automake build-essential cmake libgl1-mesa-dev ninja-build qt6-base-dev qt6-tools-dev-tools qt6-multimedia-dev ccache fonts-liberation2 zip unzip curl tar
 ```
 
 For Ubuntu 20.04 and above, ensure that the Qt6 Wayland packages are available:
@@ -56,7 +56,7 @@ Xcode 14 versions before 14.3 might crash while building ladybird. Xcode 14.3 or
 
 ```
 xcode-select --install
-brew install cmake ninja ccache
+brew install autoconf autoconf-archive automake cmake ninja ccache
 ```
 
 If you also plan to use the Qt chrome on macOS:

Userland/Libraries/LibLocale/CMakeLists.txt

@@ -21,6 +21,10 @@ serenity_lib(LibLocale locale)
 target_link_libraries(LibLocale PRIVATE LibUnicode)
 target_compile_definitions(LibLocale PRIVATE ENABLE_UNICODE_DATA=$<BOOL:${ENABLE_UNICODE_DATABASE_DOWNLOAD}>)
 
+find_package(ICU REQUIRED COMPONENTS data i18n uc)
+target_include_directories(LibLocale PRIVATE ${ICU_INCLUDE_DIRS})
+target_link_libraries(LibLocale PUBLIC ${ICU_LIBRARIES})
+
 if (DEFINED LOCALE_DATA_SOURCES)
     target_link_libraries(LibLocale PRIVATE LibLocaleData)
 endif()

vcpkg.json

@@ -1,14 +1,23 @@
 {
   "builtin-baseline": "01f602195983451bc83e72f4214af2cbc495aa94",
   "dependencies": [
-    "sqlite3",
-    "woff2",
     {
       "name": "fontconfig",
       "platform": "linux | freebsd | openbsd"
-    }
+    },
+    "icu",
+    "sqlite3",
+    "woff2"
   ],
   "overrides": [
+    {
+      "name": "fontconfig",
+      "version": "2.14.2#1"
+    },
+    {
+      "name": "icu",
+      "version": "74.2#1"
+    },
     {
       "name": "sqlite3",
       "version": "3.45.3"
@@ -16,10 +25,6 @@
     {
       "name": "woff2",
       "version": "1.0.2#4"
-    },
-    {
-      "name": "fontconfig",
-      "version": "2.14.2#1"
     }
   ]
 }