anytime I add a implementation(project (":mycpplib...

# gradle

[bjonnh]

anytime I add a implementation(project (":mycpplib")) I get a No variant found. And I'm struggling to find examples of people doing kotlin and JNI where everything is built with gradle

[Big Chungus]

That's because kotlin doesn't have cpp interop

[bjonnh]

yes I'm using cpp-library, but it is really a c program

[bjonnh]

(I force the compiler to take it as a c file)

[Big Chungus]

Did you setup cinterop, then?

[bjonnh]

not at all I'm just using JNI

[bjonnh]

let me push the last version

[bjonnh]

I can't push a binary lib it depends on though as it is proprietary , so I don't think you'll be able to build

[bjonnh]

https://github.com/bjonnh/kbaf2mzml

[bjonnh]

(it works beautifuly for what I wrote it for, but I would ideally want it to build and package properly)

[Big Chungus]

Then you don't need to add your cpp project as dependency

[Big Chungus]

Since kotlin cannot understand it

[bjonnh]

hmm but how do I tell gradle to build it as the project depends on it?

[napperley]

Since your project is using Kotlin JVM the C interop will be very difficult to implement. If the project was using Kotlin Native then C interop would be very easy to implement.

[bjonnh]

my Kotlin code is already calling my C code…

[bjonnh]

and it works

[bjonnh]

my problem is that my Kotlin gradle task cannot say it depends on the C gradle task…

[bjonnh]

I think I was not clear enough, lets summarize:
• The kotlin code can call the C code through JNI that works perfectly
• Gradle can build the C library (using cpp-library) (a sub project)
• Gradle can build the Kotlin program (a sub project)
• Gradle does not allow me to add the C library project as a dependency of the Kotlin project

[gildor]

It's correct, you cannot just add module with c code as dependency to JVM library, it will not work, because Kotlin/java plugin doesnt know how to work with such dependencies.
What you really want is to set c compilation task as dependency of Kotlin compilation (or maybe better jar creation) task, so not dependencies between modules, but between task

[gildor]

You probably need a custom task to copy resulting binaries

[bjonnh]

ok that make sense, thanks. I think I found how to do that in gradle.

[gildor]

I found how to do that in gradle

You can set dependencies between tasks with dependsOn

[bjonnh]

yes that's what I needed exactly, thanks.