libraries/stdlib/wasm/build.gradle.kts

import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
import org.jetbrains.kotlin.gradle.plugin.KotlinJsCompilerType.IR
import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootExtension
import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootPlugin

plugins {
    kotlin("multiplatform")
}

kotlin {
    js(IR) {
        nodejs()
    }
    sourceSets {
        val jsMain by getting {
            kotlin.srcDirs("builtins", "internal", "runtime")
        }
    }
}

tasks.withType<KotlinCompile<*>>().configureEach {
    kotlinOptions.freeCompilerArgs += listOf(
        "-Xallow-kotlin-package",
        "-Xallow-result-return-type",
        "-Xuse-experimental=kotlin.Experimental",
        "-Xuse-experimental=kotlin.ExperimentalMultiplatform",
        "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
        "-Xinline-classes",
        "-Xopt-in=kotlin.RequiresOptIn",
        "-Xopt-in=kotlin.ExperimentalUnsignedTypes",
        "-Xopt-in=kotlin.ExperimentalStdlibApi"
    )
}

tasks.named("compileKotlinJs") {
    (this as KotlinCompile<*>).kotlinOptions.freeCompilerArgs += "-Xir-module-name=kotlin"
}