How to set up Kotlin's byte code version in Gradle project to Java 8?

Question

In Kotlin project, what is a proper Gradle script to make sure my classes will be compiled to byte code ver 52 (Java 8)?

For some reason my classes are compiled as v

Answer 1

If you're getting an error like this: Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option.

Then, you can simply add the following in build.gradle (in Groovy) in order to tell kotlin to build using 1.8.

compileKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}