CMake: Create a set of vcpkg overlay triplets for sanitizers

This changes the Sanitizer configs to build all the vcpkg dependencies
with our specified CFLAGS and CXXFLAGS for ASAN and UBSAN.

Unfortunately, we can't yet enable actually compiling them with
sanitizers enabled, because this causes test failures that need to be
investigated.

.github/workflows/lagom-template.yml

@@ -76,6 +76,13 @@ jobs:
             echo "host_cxx=$(brew --prefix llvm@18)/bin/clang++" >> "$GITHUB_OUTPUT"
           fi
 
+      - name: Set dynamic environment variables
+        id: 'set-env-vars'
+        run: |
+          # Note: Required for vcpkg to use this compiler for its own builds.
+          echo "CC=${{ steps.build-parameters.outputs.host_cc }} >> "$GITHUB_ENV"
+          echo "CXX=${{ steps.build-parameters.outputs.host_cxx }} >> "$GITHUB_ENV"
+
       # https://github.com/actions/runner-images/issues/9330
       - name: Enable Microphone Access (macOS 14)
         if: ${{ inputs.os == 'macos-14' }}

CMakePresets.json

@@ -46,7 +46,8 @@
       "cacheVariables": {
         "CMAKE_BUILD_TYPE": "Debug",
         "ENABLE_UNDEFINED_SANITIZER": "ON",
-        "ENABLE_ADDRESS_SANITIZER": "ON"
+        "ENABLE_ADDRESS_SANITIZER": "ON",
+        "VCPKG_OVERLAY_TRIPLETS": "${sourceDir}/Meta/CMake/vcpkg/sanitizer-triplets"
       }
     },
     {

Meta/CMake/vcpkg/sanitizer-triplets/arm64-osx.cmake

@@ -0,0 +1,9 @@
+set(VCPKG_TARGET_ARCHITECTURE arm64)
+set(VCPKG_CRT_LINKAGE dynamic)
+set(VCPKG_LIBRARY_LINKAGE static)
+
+set(VCPKG_CMAKE_SYSTEM_NAME Darwin)
+set(VCPKG_OSX_ARCHITECTURES arm64)
+
+set(VCPKG_C_FLAGS "")
+set(VCPKG_CXX_FLAGS "-frtti")

Meta/CMake/vcpkg/sanitizer-triplets/x64-linux.cmake

@@ -0,0 +1,8 @@
+set(VCPKG_TARGET_ARCHITECTURE x64)
+set(VCPKG_CRT_LINKAGE dynamic)
+set(VCPKG_LIBRARY_LINKAGE static)
+
+set(VCPKG_CMAKE_SYSTEM_NAME Linux)
+
+set(VCPKG_C_FLAGS "")
+set(VCPKG_CXX_FLAGS "-frtti")

Meta/CMake/vcpkg/sanitizer-triplets/x64-osx.cmake

@@ -0,0 +1,9 @@
+set(VCPKG_TARGET_ARCHITECTURE x64)
+set(VCPKG_CRT_LINKAGE dynamic)
+set(VCPKG_LIBRARY_LINKAGE static)
+
+set(VCPKG_CMAKE_SYSTEM_NAME Darwin)
+set(VCPKG_OSX_ARCHITECTURES x86_64)
+
+set(VCPKG_C_FLAGS "")
+set(VCPKG_CXX_FLAGS "-frtti")

Meta/ladybird.sh

@@ -77,6 +77,10 @@ cmd_with_target() {
     CMAKE_ARGS+=("-DCMAKE_C_COMPILER=${CC}")
     CMAKE_ARGS+=("-DCMAKE_CXX_COMPILER=${CXX}")
 
+    # Export CC and CXX for the vcpkg toolchain, so it will pick up the same version as the ladybird build
+    export CC="$CC"
+    export CXX="$CXX"
+
     if [ ! -d "$LADYBIRD_SOURCE_DIR" ]; then
         LADYBIRD_SOURCE_DIR="$(get_top_dir)"
         export LADYBIRD_SOURCE_DIR