Hi, anyone with working example of KMP library module with swift code callable from kotlin ?

# multiplatform

[Jiri Bruchanov]

Hi, anyone with working example of KMP library module with swift code callable from kotlin ?

[François]

yes, it’s possible with spmforkmp.

[Jiri Bruchanov]

Hi, thanks. I've seen this and it works for my small example.
though I'd like to understand it and do it withou any extra plugins.

[François]

The plugin is a wrapper cinterop with extra features 🙂

[Jiri Bruchanov]

I know, I read the document, but couldn't make it working by myself in terms of final linking, so I was trying to find some working example..

[François]

Calling swift code without external dependency is not a big issue when using .def file.
but with some; it can be really complicate.

[Jiri Bruchanov]

Yeah I couldnt figure out how to make it working in kmp library,
If everything was part of the main project, it was fine..

[François]

I’m using the plugin inside a big project with multiple module with each one using spmforkmp (with external dependency), it’s working fine, sometimes I have some issue with the Gradle cache when updating the swift sources.

[Jiri Bruchanov]

yeah I get it, it works for me as well..
though I'd like to still see & understanding what does it mean to do it manually...

as android dev, whole xcode/ios build is for me very frustrating and almost everytime some unwanted xcode/macos update breaks something and this plugin is probably another candidate what might get broken with similar updates, so I'd like to know what's going on under the hood

[François]

It’s just like CocoaPods, the breaking change will be on the Kotlin side.
But these kinds of plugin requires constant maintenance because build tools evolve everywhere.

[François]

And cocoapods is dying 🙂 and spmforkmp uses the embedded swift package manager .

[François]

if you don’t want to use a plugin;
• build a xcframework like this
• import it with cinterop
• then import it on the xcode side (if needed)

[Jiri Bruchanov]

are cocoapods anyhow involved at the stage of building KMP library ?

I have it as shared -> iosApp bridge...
but the KMP library itself doesn't need it does it ? (unless I bring extra 3rd party cocoalib into it)

[Jiri Bruchanov]

exactly reason why I want to fully understand what it does, what makes me worry it's not official jetbrains plugin, so I might get into state it's broken and I have no way to make it working if I don't understand what it does

[François]

if you want to understand, try to reproduce the steps I just wrote, you have the basic

[Jiri Bruchanov]

👍 thanks