hi, in a kotlin/multiplatform project, I'm encount...

# gradle

[solonovamax]

hi, in a kotlin/multiplatform project, I'm encountering the following error

w: Kotlin Source Set 'commonBenchmarks' can't depend on 'commonMain' as they are from different Source Set Trees.
Please remove this dependency edge.

my gradle buildscript looks roughly like this (this is not the exact buildscript, just a rough recreation with only the relevant bits)

plugins {
    kotlin("multiplatform") version "2.1.10"
    kotlin("plugin.allopen")

    id("org.jetbrains.kotlinx.benchmark")
}

allOpen {
    annotation("org.openjdk.jmh.annotations.State") // Make jmh happy
}

kotlin {
    jvm {
        val benchmarks by compilations.creating {
            associateWith([e-mail]["main"])
        }
    }

    sourceSets {
        val commonBenchmarks by creating {
            dependsOn(commonMain.get())
            dependencies {
                implementation(libs.kotlinx.benchmark.runtime)
            }
        }
        val jvmBenchmarks by getting {
            dependsOn(commonBenchmarks)
        }
    }
}

benchmark {
    configurations {
        named("main") {
            reportFormat = "json"
            warmups = 5
            iterations = 5
            iterationTime = 5
            iterationTimeUnit = "s"
        }
    }
    targets {
        register("jvmBenchmarks") {
            this as JvmBenchmarkTarget
            jmhVersion = "1.37"
        }
    }
}

does anyone know how to solve this issue?

[tapchicoma]

Better to use hierarchy template to configure source sets structure in your KMP project, e.g.:

kotlin {
    applyDefaultHierarchyTemplate {
        common {
            group("commonJvm") {
                withJvm()
                withAndroid()
            }
        }
    }
}

[solonovamax]

I'm not sure hierarchy templates apply here, as the jvmMain source set (or any other such leaf source set, asside from the other new source set I introduced, jvmBenchmarks) does not depend on the commonBenchmarks source set.

[ephemient]

I have something similar working in https://github.com/ephemient/aoc2024/blob/main/kt/aoc2024-exe/build.gradle.kts; I think you may just need

kotlin {
    applyDefaultHierarchyTemplate {
        withSourceSetTree(KotlinSourceSetTree("benchmarks"))
    }
}

instead of dependsOn

[solonovamax]

interesting, I'll give that a try.