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Re: [cdt-dev] CDT Monthly Call

Hello folks,

Here are the notes from the call:



The call covered many aspects of compile_commands.json status #689.


One aspect where a decision agreed (with only minor reservations) by all in attendance is to enable the generator by a workspace preference that is disabled by default, with an API to allow CDT-LSP and other dependent projects (such as Renesas' internal editor) to enable it. Action (Jonah) record this as a TODO in the PR #692 before it is merged.


Discussions covered many other aspects, but no conclusions were reached.

In particular where exactly to hook in the generation, with the following options mentioned (with some notes about them):

  • Auto build
    • Possible to have builder configured that only generates compile_commands.json without doing compilation (make) step
    • Concerns about runtime of such a builder
    • Concerns that it runs much too often (every save of any file)
  • Same place as re-indexing
    • This is logic that exists already and is applied when compiler settings are changed (see ToolSettingsTab's isIndexerAffected)
  • in CommonBuilder (the PR currently does it here)
    • Negative is that an explicit build is required to make sure file exists and is up to date
  • related to files being added/removed (workspace listeners?)
    • this may be needed in addition to other places (such as re-indexing) to make sure new files show up in compile_commands.json
  • other places?
    • catch all for any discussion I didn't capture ;)

Some discussion on where to store the compile_commands.json, with this being some of the discussed options

  • build/compile_commands.json (the PR currently does it here)
    • concern this is outside other generated locations
    • this is one of the search locations of clangd
  • somewhere else (such as Debug/compile_commands.json) that requires updates to .clangd
    • allows file to be put in existing generated directories
    • negative is that .clangd is expected to be checked into to source control
  • using clangd-contexts
    • Action (Gesa) Investigate what this option provides and understand better what others are doing here
  • other locations?
    • e.g. in the root or other search locations that clangd uses

Neither of these discussions came to a conclusion, so further discussion is required. GitHub issues, with a lack of threading, may not be the best place to discuss. Pull out discussions into individual discussion topics and bring the conclusions back to the issue(s). A further meeting may be needed soon to continue discussions on this topic. Action (Jonah) try to schedule such a meeting.

Next Meeting

March 13 at 11am (Ottawa, Canada time)

Jonah Graham (he/him)
Kichwa Coders

On Tue, 13 Feb 2024 at 18:33, Jonah Graham <jonah@xxxxxxxxxxxxxxxx> wrote:
Hello folks,

We have our monthly call tomorrow (Wednesday). I hope you all can join us as everyone, committers, contributors and lurkers are welcome.


  1. Welcome and sign yourself in
  2. Actions from last meeting
  3. CDT 11.5.0 planning
  4. CDT LSP status
  5. compile_commands.json status
  6. Formatting of XML files in CDT's source See #646
  7. Any other business?
Jonah Graham (he/him)
Kichwa Coders

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