Emacs can be configured with lsp-mode
and clangd
to work well.
The official clangd extension can be used for C++ comprehension. Refer to ClangdConfiguration for how to configure clangd.
There are a few different ways to specify which clangd to use:
- By default, without configuration
lsp-mode
will try to find and use your systemclangd
. This is the easiest solution, but your system clangd might be out of date. - You can manually specify any
clangd
binary withlsp-clangd-binary-path
. - You can have
lsp-mode
manage yourclangd
installation with emacs'lsp-install-server
. This will install aclangd
binary for you.
(use-package lsp-mode
:hook ((c++-mode) . lsp-deferred)
:commands lsp
:config
;; clangd arguments, refer to ClangdConfiguration.md for what other arguments may be needed.
(setq lsp-clients-clangd-args '("-j=4" "-background-index" "--log=error" "--clang-tidy" "--enable-config"))
;; Optionally, set the location of clangd -- See above for options.
(setq lsp-clangd-binary-path "/usr/bin/clangd"))
There are multiple packages to handle auto formatting with
clang-format
, within emacs. Choose what works best for your setup:
Alternatively, this can be done without additional packages, using lsp-mode
.
You can use the following .dir-locals.el
file placed in the project root:
((c++-mode
(eval add-hook 'before-save-hook #'lsp-format-buffer nil t)))