coc-clangd doesnt start on .ino files

[drank40]

Even after adding

let g:coc_filetype_map = {
  \ 'ino': 'cpp',
  \ }

to my init.vim and generating a valid compile_commands.json inside of the sketch folder coc-clangd doesnt seem to start. Heres my :CocInfo :

vim version: NVIM v0.8.0
node version: v18.10.0
coc.nvim version: 0.0.81-bf505641 2022-07-30 19:03:27 +0800
coc.nvim directory: /home/(me)/.vim/plugged/coc.nvim
term: rxvt-unicode-256color
platform: linux

## Log of coc.nvim

2022-10-04T14:24:56.933 INFO (pid:38688) [plugin] - coc.nvim initialized with node: v18.10.0 after 180ms
2022-10-04T14:24:56.993 INFO (pid:38688) [services] - registered service "clangd"
2022-10-04T14:24:57.046 INFO (pid:38688) [attach] - receive notification: highlight []
2022-10-04T14:24:59.586 INFO (pid:38688) [attach] - receive notification: showInfo []

Am I missing something?

[adamansky]

May be interference with other plugins? I've disabled all arduino related plugins like stevearc/vim-arduino. Also check :CocCommand document.echoFileType

Also try the following

augroup user_files
  autocmd!
  autocmd BufNewFile,BufRead *.ino setl filetype=cpp
augroup END

[drank40]

:CocCommand document.echoFileType returns [coc.nvim] Error on notification "runCommand" : Command: document.echoFileType not found . I also tried running the same command on .c file where clangd works and it resulted in the same error.

After running the snippet you provided .ino files seem to be acknowledged by clangd (even though highlighting was turned off for some reason), yet I got some errors from clangd:

[clang drv_unknown_argument] [E] Unknown argument : '-fno-tree-switch-conversion'
[clang drv_unknown_argument] [E] Unknown argument : '-fstrict-volatile-bitfields'
[clang drv_unknown_argument] [E] Unknown argument : '-mlongcalls'; did you mean '-mlong-calls'?

These error messages apperared at the very top of my file. It also flagged arduino specific funtions like digitalWrite, aswell as consts like LED_BUILTIN as invalid.

The default compiler for my system is g++, if that bares any relevance.

EDIT:

After manually removing those flags from compile_commands.json the other errors still persist

[atrosekta]

also had the same issue (just clang not starting, not clang's errors), this snippet in my coc-settings.json fixed it :

"languageserver":{
  "arduino":{
    "command":"clangd",
    "rootPatterns":["compile_commands.json"],
    "filetypes":["arduino"]
  }
}

but removing stevearc/vim-arduino seems to also fix it

( and maybe it will save some time to someone but you need to include Arduino.h to access things like pinMode() or Serial )