message: ICU Extension Rework: clangd for extensions
  Add ${Extensions} to the clangd invocation
  to generate the data for editing the developer's extension builds.
diff: @@ -251,6 +251,6 @@ sqlsmith: debug
  clangd:
  mkdir -p ./build/clangd && \
  cd ./build/clangd && \
  - cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 ../.. && \
  + cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 ${EXTENSIONS} ../.. && \
  cd ../.. && \
  ln -sf ./build/clangd/compile_commands.json ./compile_commands.json
  