Question
How can I resolve the error 'Unable to find method void org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions.setUseIR(boolean)'?
// Example build.gradle.kts snippet
kotlin {
jvm {
compilation.allKotlinOptions {
useIR = true
}
}
}
Answer
The error message indicates that the method `setUseIR(boolean)` cannot be found in the `KotlinJvmOptions` class, typically due to version compatibility issues or incorrect usage in the Gradle build configuration.
// build.gradle.kts example configuration
plugins {
kotlin("jvm") version "1.6.0"
}
dependencies {
implementation(kotlin("stdlib"))
}
kotlin {
jvm {
withJava()
}
}
Causes
- Using an outdated version of the Kotlin Gradle plugin that does not support the `setUseIR` method.
- Incorrectly configured Gradle files leading to method resolution problems.
- Attempting to use the experimental IR backend without proper Kotlin version.
Solutions
- Update to the latest stable version of the Kotlin Gradle plugin in your `build.gradle` file: `classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.0"` or newer.
- Verify that your `build.gradle.kts` or `build.gradle` file is properly configured to use IR backend by setting the relevant options under the `kotlin` block.
- Clean and rebuild your project to ensure that all dependencies are properly recognized and recompiled.
Common Mistakes
Mistake: Using an incompatible version of Kotlin plugin and Gradle.
Solution: Ensure that your Kotlin Gradle plugin version is compatible with your version of Gradle.
Mistake: Not enabling the IR backend in the configuration.
Solution: Check your `kotlinOptions` and ensure that the IR backend is enabled correctly.
Helpers
- KotlinJvmOptions error
- setUseIR method not found
- Kotlin Gradle plugin issues
- Kotlin setup error
- fix KotlinJvmOptions bug