Hi, any idea why I can not use kotlin 1.9.20 with compose multiplatform 1.5.10?

# compose

[Jan]

Hi, any idea why I can not use kotlin 1.9.20 with compose multiplatform 1.5.10?

[Jan]

This version (1.5.3) of the Compose Compiler requires Kotlin version 1.9.10 but you appear to be using Kotlin version 1.9.20 which is not known to be compatible.  Please consult the Compose-Kotlin compatibility map located at <https://developer.android.com/jetpack/androidx/releases/compose-kotlin> to choose a compatible version pair (or `suppressKotlinVersionCompatibilityCheck` but don't say I didn't warn you!).

[Jan]

Release notes say: Support Kotlin 1.9.20, see https://github.com/JetBrains/compose-multiplatform/releases/tag/v1.5.10

[Lukasz Kalnik]

Yes, but compose compiler doesn't support Kotlin 1.9.20 yet (it's a different artifact)

[Lukasz Kalnik]

image.png

[Lukasz Kalnik]

https://developer.android.com/jetpack/androidx/releases/compose-compiler?authuser=1#1.5.3

[eygraber]

The Jetbrains Compose compiler supports 1.9.20. @Jan are you also using the Jetpack Compose compiler?

[Jan]

Hm ok, I think I am using the one from google ...

[Jan]

how can I change that?

[Lukasz Kalnik]

Theoretically it should be selected automatically:
https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-compatibility-and-versioning.html#kotlin-compatibility

[Lukasz Kalnik]

Can you show your build.gradle.kts?

[Lukasz Kalnik]

If you configure it inside the android block:

android {
   composeOptions {
        kotlinCompilerExtensionVersion = "1.5.3"
    }
}

then it probably just takes the one from Google.

[Jan]

that is probably the problem ...

[Lukasz Kalnik]

That's an example configuration of a Compose Multiplatform Android subproject
https://github.com/JetBrains/compose-multiplatform/blob/master/examples/chat/androidApp/build.gradle.kts

[Jan]

thanks, now its working!