How to suppress [ccls 32] unused function 'function name' [E]?

[harvey-wei]

On ubuntu 16.04
NVIM v0.6.1
Build type: Debug
LuaJIT 2.1.0-beta3

ccls version 0.20210330-0-g0ada56ef
clang version 7.0.0-3~ubuntu0.18.04.1 (tags/RELEASE_700/final)

[chemzqm]

Can't understand

[harvey-wei]

That was a mistake.

Hi! Where should I find the related configs? And should put diagnostics.showUnused in clang part of coc-settings.json like:
{
"languageserver": {
"ccls": {
"command": "ccls",
"filetypes": ["c", "cpp", "cuda", "objc", "objcpp"],
"rootPatterns": [".ccls-root", "build/compile_commands.json"],
"initializationOptions": {
"cache": {
"directory": ".ccls-cache"
},
"client": {
"snippetSupport": true
},
"compilationDatabaseDirectory": "build",
"clang": {
"extraArgs": [ "-std=c++20" ] ,
"diagnostic":{
"showUnused": false
}
}
}
}
}
}

[chemzqm]

https://github.com/neoclide/coc.nvim/wiki/Using-the-configuration-file

[harvey-wei]

https://github.com/neoclide/coc.nvim/wiki/Using-the-configuration-file

It still can not suppress the unused function message for static inline function!

[chemzqm]

Send your feature to ccls for report the diagnostic with unused tag.

[harvey-wei]

Send your feature to ccls for report the diagnostic with unused tag.

Hi! I switch to coc-clangd. But "diagnostic.showUnused" still did not work. I guess the cause might be the -Wunused in compile_comamnds.json. Is there any way to override the clang flags?