Well, JNI is not about build. You have to make a wrapper, then compile both parts. It is not pleasant. One can use JNA or JNR instead

I haven't even heard of JNA or JNR. 😞

JNA is a reflection - based native interface generator. It is generally slower, but much easier. JNR is a code-generation wrapper. It looks very promising and taken as a base for project Panama and next generation native interface for jvm, but last time i checked the documentation was bad.

Hmm... I don't know, isn't JNI the part shipped with Java? The two others look like separate libraries on themselves

yes. JNI is the intrinsic part of JVM. All others are libraries. Kotlin probably will have some kind of direct bridge between kotlin-jvm and kotlin-native in future which will save us completely from JNI boilerplate, but no yet

Yeah