neovimclangd

clangd doesn't respect include directories defined in .clangd

I recently switched from ctags to clangd for better lsp support in neovim. Now clangd doesn't recognize my local include directories.

I tried the following .clangd files without success (with the first one at least the macros worked which is something)

CompileFlags:
    Add:
        - -I./include
        - -I./lib
        - -D_GNU_SOURCE
        - -DSHELL="/bin/sh"

CompileFlags:
  Add: [-D_GNU_SOURCE, -DSHELL="/bin/sh", -I./include, -I./lib]

the .clangd file is at the project root, but it just won't work. What gives?

Solution

  • clangd does not support relative paths in CompileFlags; see https://github.com/clangd/clangd/issues/1038.

    The proper solution apparently is to use a compile_flags.txt or compile_commands.json file.

    Related posts on Stack Overflow (where answers recommend to use CompileFlags in .clangd, they seem to neglect to mention that this only works for absolute paths):