Unable to archive Kotlin Native with Cocoapods in XCode - xcode

Question

I try to archive in XCode 12 a project referencing a Kotlin Native framework with cocoapods plugin, but it fails with message like this (using iPhone SE to build archive)
Ignoring file *MyFramework*, building for iOS-armv7 but attempting to link with file built for iOS-arm64
Undefined symbol: _OBJC_CLASS_$_... (for armv7)
I reference my framework in Podfile of the project as a local pod (using :path and :modular_headers => true)
As I understand I have to build a fat framework to include both armv7 and arm64 but how do I manage this using Kotlin cocoapods plugin?
Here are some links with recommendations, but I was unable to put it together in my case
https://github.com/ilmat192/kotlin-native-gradle-samples/blob/master/fat-framework/build.gradle.kts
https://github.com/JetBrains/kotlin-native/issues/3140
https://medium.com/#yuyaHorita/universal-frameworks-xcframework-with-kotlinnative-999d830e206e
https://github.com/JetBrains/kotlin-native/issues/2574
https://github.com/ilmat192/kotlin-native-gradle-samples/blob/master/fat-framework/build.gradle.kts
Project's build.gradle
buildscript {
ext.kotlinVersion = '1.4.20-M2'
// use 1.3.7 to avoid iOS build error
// "Deserializer for declaration public kotlinx.coroutines/SingleThreadDispatcher|null[0] is not found"
ext.coroutinesVersion = '1.3.7'
ext.ktorVersion = '1.4.1'
ext.napierVersion = '1.4.0'
repositories {
google()
jcenter()
maven { url "https://dl.bintray.com/kotlin/kotlin-eap" }
}
dependencies {
classpath 'com.android.tools.build:gradle:4.1.0'
}
}
repositories {
google()
jcenter()
}
Molule's build.gradle
plugins {
id 'org.jetbrains.kotlin.multiplatform' version "$kotlinVersion"
id "org.jetbrains.kotlin.native.cocoapods" version "$kotlinVersion"
id "org.jetbrains.kotlin.plugin.serialization" version "$kotlinVersion"
}
repositories {
google()
jcenter()
mavenCentral()
maven { url "https://dl.bintray.com/aakira/maven" }
maven { url "https://dl.bintray.com/kotlin/kotlin-eap" }
}
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 28
defaultConfig {
applicationId 'org.jetbrains.kotlin.mpp_app_android'
minSdkVersion 16
targetSdkVersion 28
versionCode 1
versionName '1.0'
testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
}
buildTypes {
release {
minifyEnabled false
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:2.0.2'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
}
kotlin {
android("android")
targets {
final def iOSTarget = System.getenv('SDK_NAME')?.startsWith("iphoneos") \
? presets.iosArm64 : presets.iosX64
// https://kotlinlang.org/docs/reference/mpp-dsl-reference.html#native-targets
fromPreset(iOSTarget, 'ios') {
binaries {
}
}
}
// CocoaPods requires the podspec to have a version.
version = "1.0"
cocoapods {
// Configure fields required by CocoaPods.
def projectName = project.getRootProject().getName()
summary = projectName
homepage = "https://ya.ru"
ios.deploymentTarget = "9.0"
frameworkName = projectName
pod("NVHTarGzip")
}
sourceSets {
commonMain {
dependencies {
implementation kotlin('stdlib')
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.0.0")
implementation("org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:0.9.1")
// Coroutines components
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion")
// workaround https://youtrack.jetbrains.com/issue/KT-41378
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.9-native-mt-2")
// Ktor components
implementation("io.ktor:ktor-client-core:$ktorVersion")
implementation("io.ktor:ktor-network:$ktorVersion")
// workaround https://github.com/AAkira/Napier/issues/48
implementation "com.github.aakira:napier:1.4.1-alpha1"
}
}
commonTest {
dependencies {
implementation kotlin('test-common')
implementation kotlin('test-annotations-common')
}
}
androidMain {
dependencies {
// Ktor components
implementation("io.ktor:ktor-client-android:$ktorVersion")
}
}
androidTest {
dependencies {
implementation kotlin('test')
implementation kotlin('test-junit')
}
}
iosMain {
dependencies {
implementation("org.jetbrains.kotlinx:kotlinx-serialization-runtime-native:0.9.1")
// Ktor components
implementation("io.ktor:ktor-client-ios:$ktorVersion")
}
}
iosTest {
}
}
}
Solution
Actually not a true solution - based on accepted answer I just dropped armv7 support adding it to Excluded Architectures

Answer 1

building for iOS-armv7 but attempting to link with file built for iOS-arm64
Looks like you're trying to archive for armv7, which (I think) is 32 bit ios, or maybe watch, etc. Most apps need just arm64, and your Xcode framework will only be arm64 according to this:
final def iOSTarget = System.getenv('SDK_NAME')?.startsWith("iphoneos") \
? presets.iosArm64 : presets.iosX64
If you only need arm64, and if it's just an iOS app, that seems likely, you can disable armv7 architecture in your build. Alternatively, you might try the combined ios() target.
We have a functional example here: https://github.com/touchlab/KaMPKit
It is using a fork of the cocoapods plugin, but besides isStatic, it's basically the same plugin.