This is a custom Homebrew tap for macOS releases of clangd built with remote index support (grpc). The clangd binary that is shipped with macOS/XCode is compiled with mac+xpc and does not have remote index support.
This formula packages clangd-indexing-tools contents, to help clangd find built-in headers. For more information, read this issue comment and how clangd finds headers.
clangd installed via this formula will take priority in PATH so your IDE should be able to pick it at next start.
brew install alexnj/clangd/clangdOr brew tap alexnj/clangd and then brew install clangd.
To install a specific version, brew install alexnj/clangd/[email protected].
brew help, man brew or check Homebrew's documentation.