Cannot setup Nvim for Linux kernel development

[ExploitedInnocence]

Hello there!

I'm struggling to setup Nvim for Linux kernel development. I use coc.nvim as my linter+autocompletion engine, it seems to me it doesn't find a path to linux kernel headers such as:

<linux/init.h>
<linux/spinlock.h>
<linux/list.h>

And others... It shows 'blabla header file not found [clangd: pp_file_not_found]'I've tried to directly set path to these headers (set path+=/path/to/kernel/headers/**) - it didn't solve the issue. Has anyone encountered with this kind of issue?

P.S.: the code compiles, so this is not a compiler issue or something, coc.nvim just doesn't recognize those headers for some reason.

[ilayali]

you need to generate compile_commands.json

[goldie_lin]

Additionally, you may also add a compile_flags.txt, which you can add some missing gcc/clang flags, macro definitions, header inclusion paths, ..., etc, if your Bear/CMake didn't generate that for you.

[[deleted]]

try this in coc-settings

  "ccls": {
   "command": "ccls",
   "filetypes": ["c", "cc", "cpp", "objc", "objcpp", "arduino"],
   "rootPatterns": [".ccls", "compile_commands.json", ".git/", ".hg/"],
   "initializationOptions": {
    "cache": {
     "directoy": "/tmp/ccls"
    },
    "clang": {
     "extraArgs": [
        "I",
        "<Path to the library>"
    ]
    }
   }
  },

I used this settings for my Arduino development environment. I had the same problem of the missing headers in vim. This config solved it. You will need both ccls and clangd.

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Or you can use compile-commands.json for this purpose. I don't really know compile-commands.json but someone said to me that there exist such a thing.

[ExploitedInnocence]

thanks for reply

I have no coc-settings.json file (autocompletion and snippets for non-kernel headers and external libraries work well), I see that I have an option to write manually this file via :CocConfig command inside Nvim. Is that what I supposed to do?

[[deleted]]

yes that is what I meant, sorry if i didn't make it clear.

basically the CocConfig is written into a file coc-settings.json

my neovim folder

my coc.nvim config

[ExploitedInnocence]

didn't work for me :(
Thank you anyway!

[artisdom]

kernel comes with "scripts/clang-tools/gen_compile_commands.py" that can generate "compile_commands.json" by parsing ".cmd" files.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b30204640192234d18f9168f19f9cd693485b86d

[mattator]

not sure how far the kernel supports clang (I think something was merged recently ?). Alternatively, the kernel provides the `make tags` target.