Has anyone encountered that error regarding `jvmTa...

# announcements

[louiscad]

Has anyone encountered that error regarding jvmTarget?

> Task :some-android-lib-module:compileDebugKotlin FAILED
e: Unknown JVM target version: 1.7
Supported versions: 1.6, 1.8

[Marc Knaup]

Kotlin only distinguishes between these two, so you cannot set 1.7.

[louiscad]

That's what I saw, and it's putting me into a dead end as I'm using a library (androidx core ktx) that has previously been compiled with 1.7 while it was allowed, and the compiler requires me to target 1.7 (which doesn't work), or 1.8 (which is risky on Android)

[Marc Knaup]

This is just about the kind of bytecode which Kotlin generates, so 1.6 should be fine when targeting Java 7.

All Java-specific properties like source- and targetCompatibility can still be 1.7.

[louiscad]

Unfortunately, no. I reported the issue: https://issuetracker.google.com/issues/126434413

[Marc Knaup]

How did you set that up?
This works just fine:

dependencies {
    // …
    testImplementation 'androidx.test:core-ktx:1.1.0'
}

and

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    sourceCompatibility = JavaVersion.VERSION_1_7
    targetCompatibility = JavaVersion.VERSION_1_7

    kotlinOptions {
        jvmTarget = '1.6'
    }
}

[Marc Knaup]

oh nvm, now I see it

[Marc Knaup]

only breaks for inline functions 😕

[louiscad]

Yep, like launchActivity