Kotlin native error unresolved reference coroutines

Question

I'm trying to build a native in Windows.

I'm not sure where to put the dependency for implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.5'.

My current gradle file looks like this:

buildscript {
    ext.kotlin_version = '1.3.72'
    repositories {
        mavenCentral()

    }
    dependencies {
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
    }
}

plugins {
    id 'org.jetbrains.kotlin.multiplatform' version '1.3.72'
}

dependencies {
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.5'
}

repositories {
    mavenCentral()
    jcenter()
}
kotlin { 
    mingwX64("mingw") {
        binaries {
            executable {
                // Change to specify fully qualified name of your application's entry point:
                entryPoint = 'sample.main'
                // Specify command-line arguments, if necessary:
                runTask?.args('')
            }
        }
    }
    sourceSets { 
        mingwMain {

        }
        mingwTest {
        }

    }
    experimental {
        coroutines 'enable'
    }

}

This dependency line gives error:

dependencies {
        implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.5'
    }

The error is:

Could not find method implementation() for arguments [org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.5] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

If I remove that dependency, I get "unresolved Reference" if I try to import kotlinx.coroutines.* and kotlin.concurrent.thread

Appreciate some help on this.

Thanks

Dmitri · Accepted Answer · 2020-05-02 17:00:31Z

1

org.jetbrains.kotlinx:kotlinx-coroutines-core-native

also Kotlin/Native supports only Gradle version 4.10 and you need to enable Gradle metadata in your settings.gradle file:

enableFeaturePreview('GRADLE_METADATA') Since Kotlin/Native does not generally provide binary compatibility between versions, you should use the same version of Kotlin/Native compiler as was used to build kotlinx.coroutines.

https://github.com/Kotlin/kotlinx.coroutines/blob/master/README.md

edited May 2, 2020 at 17:00

answered May 2, 2020 at 16:47

Dmitri

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5 Comments

Prana Over a year ago

@Dimitri Thanks a lot. This solved the problem completely.

Prana Over a year ago

One problem while running this: fun main() { GlobalScope.launch { delay(1000L) println("World!") } println("Hello,") Thread.sleep(2000L) //No Thread!! } No Thread found in package.... unresolved reference....

Prana Over a year ago

Seems no kotlin.concurrent package is found here also!!

Dmitri Over a year ago

yes, concurrent is only available for JVM at this time. kotlinlang.org/api/latest/jvm/stdlib - scroll down to concurrent and you will see the green circle only (JVM)

Prana Over a year ago

Yes, can see now. Thanks

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