Is it possible to load an SPM framework/dylib at runtime under Linux

I can use Bundle on macOS to load a framework at runtime, and that works reasonably well even with Swift (given the principal class is @objc). Can I do something similar under Linux?

A similar question has been posted quite a while ago without any answer (How do you dynamically load a module on Linux?)

Given that Swift has advanced quite a bit, is this possible now?

Can I load a framework/dylib under linux at runtime and use it? Bundle seems to be mostly unimplemented in corelibs foundation.

It is definitely possible to load dylib in linux using swift, I made a little example app couple months ago to document a bug in SPM. You can see implementation here:

there are two related projects, one that defines plugin's interface and other that show how actual plugin is implemented:


Not sure if this is exactly what you need, but it is possible to load your own dylib and interface with it

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Ok the problem here is that only C functions can be called, and Swift libraries are not really supported.

I guess my question is if there is any kind of story or roadmap on how and when this is planned to be properly supported (not just on Linux). I mean even on macOS the requirement to only use Obj-C protocols leaves a lot to be desired.

Anyone? @Tony_Parker?

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I think we can start with a JIRA, for the Linux bit.

This may depend on ABI and module stability; otherwise loading some bit of Swift code that was not compiled with the rest of your code may result in some strange behavior.

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Thank you Tony for your answer. Makes sense that it is tied to ABI stability. I can’t wait though when Swift on Linux is fully usable™

Should I file the issue on Jira? I guess you are a lot better at wording it though :wink:

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Maybe @Aciid knows something about this :slight_smile:?

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Please feel free to create one yourself, and put a link here. Thanks!

I created https://bugs.swift.org/browse/SR-7494

Please feel free to fix terminology mistakes. I have no CS ed after all.

Thank you for your kind support.