Hallo, I have project with android and jvm as targ...

# ios

[Ahmed Mourad]

Hallo, I have project with android and jvm as targets and wanted to add ios, the project uses Kotlin 1.8 🧵

[Ahmed Mourad]

So this's what my common build.gradle looks like:

import dev.icerock.gradle.MRVisibility

plugins {
    kotlin("multiplatform")
    kotlin("native.cocoapods")
    id("com.android.library")
    id("kotlin-parcelize")
    id("org.jetbrains.compose")
    id("dev.icerock.mobile.multiplatform-resources")
    id("com.squareup.sqldelight")
    id("com.google.devtools.ksp") version "1.8.0-1.0.9"
}

group = "dev.ahmedmourad.clockwise.common"
version = "1.0-SNAPSHOT"

kotlin {
    android {
        dependencies {
            coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.3")
        }
    }
    jvm("desktop") {
        jvmToolchain(17)
    }
    listOf(
        iosX64(),
        iosArm64(),
        iosSimulatorArm64()
    ).forEach { iosTarget ->
        iosTarget.binaries.framework {
            baseName = "common"
            isStatic = true
        }
    }
    cocoapods {
        summary = "Some description for the Common Module"
        homepage = "Link to the Common Module homepage"
        version = "1.0"
        ios.deploymentTarget = "14.1"
        podfile = project.file("../ios/Podfile")
        framework {
            baseName = "common"
        }
    }
    sourceSets {
        val commonMain by getting {
            dependencies {
//...
            }
        }
        val commonTest by getting {
            dependencies {
//...
            }
        }
        val androidMain by getting {
            dependencies {
//...
            }
        }
        val androidUnitTest by getting {
            dependencies {
//...
            }
        }
        val androidInstrumentedTest by getting {
            dependencies {
//...
            }
        }
        val desktopMain by getting {
            dependencies {
//...
            }
        }
        val desktopTest by getting
        val iosX64Main by getting
        val iosArm64Main by getting
        val iosSimulatorArm64Main by getting
        val iosMain by creating {
            dependsOn(commonMain)
            iosX64Main.dependsOn(this)
            iosArm64Main.dependsOn(this)
            iosSimulatorArm64Main.dependsOn(this)
        }
    }
}

[Ahmed Mourad]

This fails on gradle sync with the following error:

A problem occurred configuring project ':common'.
> Could not create task ':common:kspIosMainKotlinMetadata'.
   > class org.jetbrains.kotlin.gradle.tasks.KotlinNativeCompile_Decorated cannot be cast to class org.jetbrains.kotlin.gradle.tasks.KotlinCompileCommon (org.jetbrains.kotlin.gradle.tasks.KotlinNativeCompile_Decorated and org.jetbrains.kotlin.gradle.tasks.KotlinCompileCommon are in unnamed module of loader org.gradle.internal.classloader.VisitableURLClassLoader @103c20a6)

[Ahmed Mourad]

If I change the iosMain section to this:

val iosMain by creating {
   dependsOn(commonMain)
}

The error changes to this:

error.txt

[Ahmed Mourad]

This's what my file structure looks like, any ideas?

[Konstantin Tskhovrebov]

first of all, you are not supposed to register ios frameworks manually if you use cocoapods plugin.
the plugin makes it by its own. and it has own the 'framework' block inside 'cocoapods'

[Ahmed Mourad]

@Konstantin Tskhovrebov So if I replace this:

listOf(
    iosX64(),
    iosArm64(),
    iosSimulatorArm64()
).forEach { iosTarget ->
    iosTarget.binaries.framework {
        baseName = "common"
        isStatic = true
    }
}

with this:

iosX64()
iosArm64()
iosSimulatorArm64()

it fixes the second case where iosMain looks like this:

val iosMain by creating {
   dependsOn(commonMain)
}

and the build is successful!!

If iosMain looks like this tho it still produces the first error:

val iosMain by creating {
    dependsOn(commonMain)
    iosX64Main.dependsOn(this)
    iosArm64Main.dependsOn(this)
    iosSimulatorArm64Main.dependsOn(this)
}

this's for the purpose of having one source set for all the ios variations

[Ahmed Mourad]

Just tried this as well, same error:

ios()
val iosMain by getting {
    dependsOn(commonMain)
}

[Jeff Lockhart]

I'd highly recommend using the new target hierarchy API to define depends on relationships between target and intermediate source sets. It simplifies the configuration and makes it much more readable.

[russhwolf]

Can you build from command line? If it’s only an error on sync then it might be a version mismatch in the IDE plugin

[Ahmed Mourad]

@Jeff Lockhart I think it's only available from Kotlin 1.8.20, i'm using 1.8.0

I think it was compose mp preventing me from going higher but can't really remember

[Ahmed Mourad]

@russhwolf I found the source of the issue there was ksp which i was using for the android module as follows:

configurations["ksp"].dependencies.add(project.dependencies.create("io.github.raamcosta.compose-destinations:ksp:1.8.42-beta"))

commenting out this line stops the error for now

Now though i'm getting this error when building ios:

e: java.lang.NullPointerException: null cannot be cast to non-null type org.jetbrains.kotlin.ir.declarations.IrFunction
	at org.jetbrains.kotlin.backend.konan.lower.ExpectToActualDefaultValueCopier$copyDefaultArgumentsFromExpectToActual$1.visitValueParameter(ExpectDeclarationsRemoving.kt:227)

I removed all default arguments from all expect functions/classes but that didn't fix it

building desktop works fine, i assume android would as well because it did before, so only ios does this

[Jeff Lockhart]

Compose MP 1.5.1 supports Kotlin 1.9.10, so you might try updating now.

[Ahmed Mourad]

@Jeff Lockhart That actually fixed the error! thank you!