Matthijs Kooijman

What error do you get when it's not working? Does it happen with any sketch (e.g. also the bare minimum sketch, maybe with just one include added)?

What error do you get when it's not working?

The output you provided is very weird, since it seems arduino-builder just stops with an error code, without printing any error message. Looking at the changes to arduino-builder between IDE...

Thanks for the followup and additional details. So the commit I mentioned above is somehow responsible, but I'm quite unsure how exactly... No time to look deeper right now, but...

I believe there are open issues about this already, did you look for them? In any case, I'd really like to see the IDE support a `libraries` folder (as well...

> I want to add a +1 here too. I'm working on a series of sketches all utilizing the same set of core private headers, and having to make duplicate...

I think this is another case where the automatic prototype generation that arduino-cli does cannot cope with more complicated sketches. What I suspect happens, is that a prototype is generated...

I've updated the issue title, as this is not an ESP32-specific issue.

This is caused by caching: the second time the file is not recompiled if it was unchanged, so the warnings are not shown. The only way I can see to...

> would you really want --optimize-for-debug on as a default? Possibly, yes. 99% (or something like that) of the uploads I do are during development, for testing, only a fraction...