how to configure doom emacs (generic emacs too) with a C project

I found always frustrating that m emacs is not able to find the struct or function that I define in another file because my emacs configuration (from today's doom emacs configuration) is too basic to make me productive with emacs. There are some suggestions on how I can make a good configuration of my emacs for a pure C project?

[Tree Sitter](https://github.com/emacs-tree-sitter/elisp-tree-sitter) and [lsp-mode](https://emacs-lsp.github.io/lsp-mode/tutorials/CPP-guide/) might be of help. Looks like both take a bit of work to get going. I have personally not used them, so try out which suits you and let us know how it went.

lsp-mode is the way to go. Assuming you are on Linux, it's really easy to install and get working. You do need to configure your build system to create a `compile-commands.json` file an place it in your project's root directory for projects that have more than one file. I've also had better luck using `clang` as the compiler and `clangd` as the language server instead of gcc for whatever reason. Here's how to install it: 1. Install `clangd` and related LLVM tools 2. Install and configure lsp-mode. Here's the config I have using `use-package`: ​ (use-package lsp-mode :commands lsp :ensure t :config (setq lsp-prefer-flymake nil) :hook ((c-mode c++-mode rust-mode objc-mode) . (lambda () (lsp)))) 3. Install \`company-mode\` and turn it on to get a more IDE-like auto completion: (use-package company :config (setq company-minimum-prefix-length 1) (setq company-idle-delay 0.1) (setq company-backends '(company-elisp company-cmake company-capf company-files (company-dabbrev-code company-gtags company-etags company-keywords) company-oddmuse company-dabbrev)) :ensure t) When you open a C file, you should get asked some questions about how to find the project configuration. After that, everything should just work.

Thanks! I will try this later :)

`counsel-etags` for code navigation `company-ctags` for code completion Both requires command line tool ctags (universal-ctags is recommended).

do you have any tips to configure ctags?

I don't have any special setup for universal-ctags which already supports C and many other languages out of box.

works like a charm!

If you're on doom, go to the init ~/.doom.d/init and find the programming language you want to set up, c or whatever. Add a parenthesis at the beginning and add lsp after the c (remove the ; ) so (c +lsp) whatever. If you push K and look at the flags you can see what might be needed

Mh no for autosuggestion I need the addition before!