Question about jextract --depends-on

[ktoso]

Split out from #715

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When calling the JExtract tool for TargetA, it correctly adds '--depends-on' for TargetB.
I would assume that API in TargetA that uses types from TargetB could now be exposed to java, but it appears that they are stripped - just like when there were no dependency on TargetB.

Is this supposed to work like I expect, or am I misunderstanding the role of '--depends-on'?

[ktoso]

@mortenbekditlevsen this may just be a missing feature, I'll look into it 👀

[madsodgaard]

--depends-on is used to support using wrapped Java types.

So a Swift function like:

func takeLong(long: JavaLong)

would be wrapped to
public void takeLong(Long long)

and depends-on is what enables that.

So yeah, it's not for cross Swift module imports, which is a missing feature.

[mortenbekditlevsen]

Excellent, thanks for the explanation.
So the recommendation for now is to expose all types that you wish to use from Java in a single target, right?