Hi. How do I set main class directly from commonMain? Here is my build script for the module I have

plugins {
    kotlin("multiplatform")
    kotlin("plugin.serialization")
    application
}

repositories {
    mavenCentral()
}

application {
    mainClass.set("MainKt")
}

kotlin {
    jvm {
        val main by compilations.getting {
            kotlinOptions {
                jvmTarget = JavaVersion.VERSION_11.toString()
            }
        }
    }

    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation("org.jetbrains.kotlinx:kotlinx-cli:0.3.5")
            }
        }
        val jvmMain by getting
    }
}

There is main.kt file with main() function inside commonMain source set. It also has the run button but when I try to run it this happens

Error: Could not find or load main class MainKt
Caused by: java.lang.ClassNotFoundException: MainKt

This should be correct. You can see the classes in the build folder for debugging. Or send more details.

It looks like this

The

application

plugin, doesn't know how to properly play with kotlin multiplatform plugin

It does, you need to use

jvmTarget { withJava() }

Thanks, it works now.

Hm, this is another Kotlin Idea Plugin error (KTIJ) project at youtrack