How to Resolve the Error: Unable to Find Method 'void org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions.setUseIR(boolean)'

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  • Using an outdated version of the Kotlin Gradle plugin that does not support the `setUseIR` method.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

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