emacs-ccls is a client for ccls, a C/C++/Objective-C language server supporting multi-million line C++ code-bases, powered by libclang.

It leverages lsp-mode, but also provides some ccls extensions to LSP:

• semantic highlighting
• skipped ranges (e.g. a #if false region)
• cross references: $ccls/inheritance $ccls/call $ccls/vars

(require 'ccls)
(setq ccls-executable "/path/to/ccls/Release/ccls")

Refer to https://github.com/MaskRay/ccls/wiki/lsp-mode for details.

$ccls/call (caller/callee, with hierarchical view)

https://github.com/MaskRay/ccls/wiki/lsp-mode#ccls-navigate

MIT