Re: [OE-core] [PATCH 1/3] clangd: add compile_commands.bbclass

[Khem Raj <raj.khem@gmail.com>]

On 8/4/25 3:42 AM, Alexander Kanavin via lists.openembedded.org wrote:
> On Sun, 3 Aug 2025 at 03:04, Anakin Childerhose via
> lists.openembedded.org <anakin=childerhose.ca@lists.openembedded.org>
> wrote:
>> Add a class to link the ${B}/compile_commands.json file to
>> ${S}/compile_commands.json to automatically configure the clangd
>> language server for build systems that generate a compile_commands.json
>> file.
> 
> I don't understand this description. What does this json file do, what
> does clangd language server do,

It will be good to summarize that it implements LSP for C/C++ and 
reference to https://microsoft.github.io/language-server-protocol/

  why can't it find the original file in
> ${S} and should that be fixed instead? Having different directories
> for source and build artefacts is common, and we shouldn't be fixing
> it up for others.
> 

Clangd tries several search paths in S and B as well, but perhaps
something is unique about OE build structure that it is not able to
find it ?

clangd has --compile-commands-dir=<...> option which might be of 
interest here

Aside from this, I think it will be good to add 
-DCMAKE_EXPORT_COMPILE_COMMANDS=ON via cmake.bbclass if someone wants
LSP at distro level.

> Alex
> 
> 
> 
> -=-=-=-=-=-=-=-=-=-=-=-
> Links: You receive all messages sent to this group.
> View/Reply Online (#221424): https://lists.openembedded.org/g/openembedded-core/message/221424
> Mute This Topic: https://lists.openembedded.org/mt/114509177/1997914
> Group Owner: openembedded-core+owner@lists.openembedded.org
> Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [raj.khem@gmail.com]
> -=-=-=-=-=-=-=-=-=-=-=-
>