How to enable `UseExperimental` annotation in mult...

# multiplatform

[Matej Drobnič]

How to enable UseExperimental annotation in multiplatform project? I tried

kotlin {
    targets.all {
        compilations.all {
            kotlinOptions {
                freeCompilerArgs += "-Xuse-experimental=kotlin.Experimental"
            }
        }
    }
}

and IntelliJ still warns about missing compiler argument

[russhwolf]

You can do it from sourceSets instead of targets.

sourceSets {
        all {
            languageSettings {
                useExperimentalAnnotation('kotlin.Experimental')
            }
        }
}

[Matej Drobnič]

thanks

[Matej Drobnič]

is this described in a documentation somewhere?

[Matej Drobnič]

How would one stumble upon this?

[louiscad]

Yes, it's documented here: https://kotlinlang.org/docs/reference/building-mpp-with-gradle.html#language-settings

[Matej Drobnič]

It's not described here though 😞

https://kotlinlang.org/docs/reference/experimental.html

[louiscad]

You can change that by clicking on Edit page and submitting a PR to improve it 🙂

[Matej Drobnič]

oh right

[Matej Drobnič]

will do that 😄

[russhwolf]

The building-mpp-with-gradle page tends to be the most up-to-date for this stuff. Lots of little things outdated elsewhere.