How do I set a Kotlin compiler switch in a multiplatform `build.gradle.kts`?

# multiplatform

[Edoardo Luppi]

How do I set a Kotlin compiler switch in a multiplatform build.gradle.kts?

[Robert Munro]

sourceSets {
    all {
        languageSettings.optIn("kotlin.time.ExperimentalTime")
        languageSettings.optIn("kotlinx.coroutines.ExperimentalCoroutinesApi")
        languageSettings.optIn("kotlinx.serialization.ExperimentalSerializationApi")
    }

this is for an optin if thats what you want

[Edoardo Luppi]

@Robert Munro thanks! This one is also useful. Although I was thinking about switches like -Xdebug

[Robert Munro]

Ok that's a JVM switch

[Robert Munro]

Or are you looking to do native debugging?

[Robert Munro]

Or gradle debug info?

[Edoardo Luppi]

I was looking at https://kotlinlang.org/docs/debug-flow-with-idea.html#optimized-out-variables
And it mention it as "compiler argument", that's why I've used that name

[Robert Munro]

Are you running your code on JVM? I usually get to the issue quicker by just logging out info sometimes. Sometimes breakpoints are missed or unpredictable as coroutines are concurrent

[Edoardo Luppi]

I am running the commonTest tests on the JVM as of now, yes.
I'd like to test out -Xdebug as any enhancement on DevEx is a +1 when I'll get to present a multiplatform POC

[Edoardo Luppi]

Keep in mind a team coming from Java will use the debugger extensively (me included), so any other approach may break the workflow.

[Robert Munro]

So what is going wrong? Maybe post the error or failure you are getting in the test?

[Robert Munro]

seems like -Xdebug might be a red herring - but not sure of the use case

[Robert Munro]

if you are using intellij and the tests are quite liner codewise then it should be handled automatically by IJ

[Edoardo Luppi]

See that I can't access anymore socket, connect and serviceLevel at that point.
Which makes the debug experience miserable

[Robert Munro]

ok so yes i see the optimised out message

[Robert Munro]

you can make an andriod section in your kvm module

[Robert Munro]

android {
    javaCompileOptions {
       compileOptions {
          arguments += ["-Xebug":true]
       }
    }
   
}

[Robert Munro]

it just a guess though ..

[Robert Munro]

assumoing u are using kts build

[Edoardo Luppi]

val configuration: KotlinCompilationTask<*>.() -> Unit = {
  val isDebug = project.property("your.debug.prop")

  if (isDebug == "true") {
    compilerOptions {
      freeCompilerArgs.add("-Xdebug")
    }
  }
}

tasks.named<KotlinCompilationTask<*>>("compileKotlinJvm", configuration)
tasks.named<KotlinCompilationTask<*>>("compileTestKotlinJvm", configuration)

This does the trick it seems.