How to install clangd on Mac?

Question

I am trying to use clangd with Spacemacs according to the c-cpp page. I have tried downloading the macOS binary for LLVM and I have followed this and this, but when I run which clangd, it says it cannot be found. I have also run brew install llvm, but that also doesn't show that clangd is in my path. I do have a binary under /usr/local/Cellar/llvm/9.0.0_1/bin, but my LSP doesn't do anything when I restart Emacs and open a C++ source file. I have /usr/local/bin in my path.

Answer 1

I added /usr/local/opt/llvm/bin/ to my PATH and that worked. Thanks to Mikael Springer. I wonder why it wasn't working with the other location (and why I have multiple copies of llvm binaries).

Answer 2

I have the following in my init.el with Emacs, not Spacemacs;

(use-package lsp-clients
    :config
    (setq lsp-clients-clangd-executable "/usr/local/opt/llvm/bin/clangd")
    (setq lsp-clients-clangd-args '("-j=4" "-background-index" "-log=info" "-pretty" "-resource-dir=/Applications/Xcode9.2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/9.0.0")))

As you can see I use use-package for Emacs package management but the important part is setting the lsp-clients-clangd-* variables. I install LLVM (and clangd) using brew install llvm. I don't know how or if this might help you since you use Spacemacs and I am not familiar with configuring Spacemacs.