Hi I am new to kmm. I started with AppCode and created a new kmm project. When I want to build the app for iOS I ran into the following error:

ld: building for iOS Simulator, but linking in dylib built for iOS, file '../../../../../shared/build/bin/iosArm64/debugFramework/shared.framework/shared' for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

> Task :iosApp:buildIosAppMain FAILED

The following build commands failed:
	Ld /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/bin/iosApp/Debug-iphonesimulator/HelloWorld.app/HelloWorld normal (in target 'iosApp' from project 'iosApp')
(1 failure)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':iosApp:buildIosAppMain'.
> Process 'command 'xcrun'' finished with non-zero exit value 65

I work on a MacBook Pro M1 with macOS 12.1 and xCode 13.2.1. How can I fix this linking error?

Hello, @Roger Kreienbühl! Please check if your shared module has the

iosSimulatorArm64

target uncommented in the

build.gradle.kts

file.

@Artyom Degtyarev [JB] Thanks for your response.

iosSimulatorArm64

was missing. I added

iosSimulatorArm64()

to

kotlin {}

and added

val iosSimulatorArm64Main by getting
val iosSimulatorArm64Test by getting

iosSimulatorArm64Main.dependsOn(iosMain)
iosSimulatorArm64Test.dependsOn(iosTest)

to

kotlin { sourceSets {} }

as mentioned in the docs, but I have the same error. My

build.gradle.kts

for the shared module looks like this:

plugins {
    kotlin("multiplatform")
    id("com.android.library")
    id("kotlin-android-extensions")
}

repositories {
    google()
    jcenter()
}

kotlin {
    android()
    ios {
        binaries {
            framework {
                baseName = "shared"
            }
        }
    }
    iosSimulatorArm64()
    sourceSets {
        val commonMain by getting
        val commonTest by getting {
            dependencies {
                implementation(kotlin("test"))
            }
        }
        val androidMain by getting {
            dependencies {
                implementation("com.google.android.material:material:1.2.1")
            }
        }
        val androidTest by getting {
            dependencies {
                implementation("junit:junit:4.13")
            }
        }
        val iosMain by getting
        val iosTest by getting
        val iosSimulatorArm64Main by getting
        val iosSimulatorArm64Test by getting

        iosSimulatorArm64Main.dependsOn(iosMain)
        iosSimulatorArm64Test.dependsOn(iosTest)
    }
}

android {
    compileSdkVersion(29)
    sourceSets["main"].manifest.srcFile("src/androidMain/AndroidManifest.xml")
    defaultConfig {
        minSdkVersion(24)
        targetSdkVersion(29)
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
}

and the one for iOS like this:

plugins {
    id("org.jetbrains.gradle.apple.applePlugin") version "212.4638.14-0.15"
}

apple {
    iosApp {
        productName = "HelloWorld"

        sceneDelegateClass = "SceneDelegate"
        launchStoryboard = "LaunchScreen"

        //productInfo["NSAppTransportSecurity"] = mapOf("NSAllowsArbitraryLoads" to true)
        //buildSettings.OTHER_LDFLAGS("")

        dependencies {
            implementation(project(":shared"))
        }
    }
}

The whole error log with stacktrace is:

> Task :iosApp:buildIosAppMain FAILED
RUNNING XCODEBUILD:
objc[25765]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libauthinstall.dylib (0x1f2616b90) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x107a402c8). One of the two will be used. Which one is undefined.
objc[25765]: Class AMSupportURLSession is implemented in both /usr/lib/libauthinstall.dylib (0x1f2616be0) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x107a40318). One of the two will be used. Which one is undefined.
Command line invocation:
    /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -project iosApp.xcodeproj -scheme iosApp -configuration Debug OBJROOT=../../../classes/apple/iosApp/build SYMROOT=../../../bin/iosApp -arch arm64 -derivedDataPath ../../../classes/apple/iosApp/DerivedData -sdk iphonesimulator build

User defaults from command line:
    IDEDerivedDataPathOverride = /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/classes/apple/iosApp/DerivedData
    IDEPackageSupportUseBuiltinSCM = YES

Build settings from command line:
    ARCHS = arm64
    OBJROOT = ../../../classes/apple/iosApp/build
    SDKROOT = iphonesimulator15.2
    SYMROOT = ../../../bin/iosApp

--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device }
{ platform:iOS Simulator, id:FD0F2302-9B3D-42C3-A429-9B9016EB7F83, OS:15.2, name:iPhone 8 }
{ platform:iOS Simulator, id:28ACB7EC-E937-41C8-B499-CF8A44E1F8D5, OS:15.2, name:iPhone 8 Plus }
{ platform:iOS Simulator, id:C19209A0-387F-436F-9967-E8F0B512F9DA, OS:15.2, name:iPhone 11 }
{ platform:iOS Simulator, id:A034500C-9AC8-4040-B191-6AAF1E90B6B2, OS:15.2, name:iPhone 11 Pro }
{ platform:iOS Simulator, id:5325AABE-2864-49B9-AD83-25EA389CC3B5, OS:15.2, name:iPhone 11 Pro Max }
{ platform:iOS Simulator, id:2C752D57-4EA6-4250-8A16-1B7D1EE1EDAB, OS:15.2, name:iPhone 12 }
{ platform:iOS Simulator, id:FC3B2B7A-0FE7-4B2A-B126-F9D995508F8C, OS:15.2, name:iPhone 12 Pro }
{ platform:iOS Simulator, id:58FFD604-CA26-4451-8CF7-FCE7754C8BE5, OS:15.2, name:iPhone 12 Pro Max }
{ platform:iOS Simulator, id:3C0CCCBA-62C5-4128-B922-888673902C09, OS:15.2, name:iPhone 12 mini }
{ platform:iOS Simulator, id:F338FE49-B120-4FDB-8707-9F2CE5E860AA, OS:15.2, name:iPhone 13 }
{ platform:iOS Simulator, id:EBD2B58E-0914-4F23-951C-2C2EC7FE126B, OS:15.2, name:iPhone 13 Pro }
{ platform:iOS Simulator, id:EDCD5868-6863-47EF-9ADB-CAE9FD121734, OS:15.2, name:iPhone 13 Pro Max }
{ platform:iOS Simulator, id:0A5708CA-F68A-4F78-9E6C-4E7EDA9A2A6D, OS:15.2, name:iPhone 13 mini }
{ platform:iOS Simulator, id:866FE91A-0B5F-4EDD-B451-7889AD000BFC, OS:15.2, name:iPhone SE (2nd generation) }
{ platform:iOS Simulator, id:1BCA0AF7-AB7D-4EDB-BA65-5A60A3C038BA, OS:15.2, name:iPod touch (7th generation) }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:00006000-000A44212238801E }
{ platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device }
{ platform:iOS Simulator, id:74FA5EAA-8333-42A1-A467-61C210DEDE63, OS:15.2, name:iPad (9th generation) }
{ platform:iOS Simulator, id:CA6E27ED-4A34-421B-B1B3-2677EA657D85, OS:15.2, name:iPad Air (4th generation) }
{ platform:iOS Simulator, id:26E1DD85-CB51-42C9-B33C-A69DD6EDDCF2, OS:15.2, name:iPad Pro (9.7-inch) }
{ platform:iOS Simulator, id:A76C0A97-D114-45CA-9D06-E24EFFC5F22F, OS:15.2, name:iPad Pro (11-inch) (3rd generation) }
{ platform:iOS Simulator, id:FB269545-7742-480F-8172-FC109E94503B, OS:15.2, name:iPad Pro (12.9-inch) (5th generation) }
{ platform:iOS Simulator, id:57C341FB-FC28-4B40-91F6-1329474F1326, OS:15.2, name:iPad mini (6th generation) }
note: Using new build system
note: Planning
Analyze workspace

Create build description
Build description signature: b0e4f9753ff18eeb064a6f7398a96bc2
Build description path: /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/tmp/apple/iosApp/../../../classes/apple/iosApp/build/XCBuildData/b0e4f9753ff18eeb064a6f7398a96bc2-desc.xcbuild

note: Build preparation complete
note: Building targets in dependency order
Ld /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/bin/iosApp/Debug-iphonesimulator/HelloWorld.app/HelloWorld normal (in target 'iosApp' from project 'iosApp')
    cd /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/tmp/apple/iosApp
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -target arm64-apple-ios15.2-simulator -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk -L/Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/bin/iosApp/Debug-iphonesimulator -F/Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/bin/iosApp/Debug-iphonesimulator -F../../../../../shared/build/bin/iosArm64/debugFramework -filelist /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/classes/apple/iosApp/build/iosApp.build/Debug-iphonesimulator/iosApp.build/Objects-normal/arm64/HelloWorld.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/classes/apple/iosApp/build/iosApp.build/Debug-iphonesimulator/iosApp.build/Objects-normal/arm64/HelloWorld_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -Xlinker -objc_abi_version -Xlinker 2 -fobjc-link-runtime -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator -L/usr/lib/swift -Xlinker -add_ast_path -Xlinker /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/classes/apple/iosApp/build/iosApp.build/Debug-iphonesimulator/iosApp.build/Objects-normal/arm64/iosApp.swiftmodule -Xlinker -sectcreate -Xlinker __TEXT -Xlinker __entitlements -Xlinker /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/classes/apple/iosApp/build/iosApp.build/Debug-iphonesimulator/iosApp.build/HelloWorld.app-Simulated.xcent -framework shared -Xlinker -no_adhoc_codesign -Xlinker -dependency_info -Xlinker /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/classes/apple/iosApp/build/iosApp.build/Debug-iphonesimulator/iosApp.build/Objects-normal/arm64/HelloWorld_dependency_info.dat -o /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/bin/iosApp/Debug-iphonesimulator/HelloWorld.app/HelloWorld
ld: building for iOS Simulator, but linking in dylib built for iOS, file '../../../../../shared/build/bin/iosArm64/debugFramework/shared.framework/shared' for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

** BUILD FAILED **


The following build commands failed:
	Ld /Users/rogerkreienbuehl/Programmieren/HelloWorld/iosApp/build/bin/iosApp/Debug-iphonesimulator/HelloWorld.app/HelloWorld normal (in target 'iosApp' from project 'iosApp')
(1 failure)

Execution failed for task ':iosApp:buildIosAppMain'.
> Process 'command 'xcrun'' finished with non-zero exit value 65

This script does not specify actual framework for the required target. See, the

binaries

block here applies only to the

ios

target shortcut, which is just a wrapper for

iosX64

&

iosArm64

targets. Please copy the

binaries

block into your

iosSimulatorArm64

and check if this would make any difference. I'm not too familiar with AppCode's approach on importing frameworks, but I hope that it won't require any additional steps.

I have also tryed this, but also get the same error

Please try deleting the

shared/build/

folder to force the AppCode search for the framework. If this also won't help, let's try specifying the framework location explicitly as described here:https://plugins.jetbrains.com/plugin/17098-kotlin-multiplatform-mobile-for-appcode/docs/kmm-project-structure.html. @Vyacheslav Karpukhin [JB], could you please have a look? Maybe we're missing something obvious here.

Deleting the

shared/build/

folder dind’t work. Will try specifying the framework location explicitly in the afternoon.

Hi, I'll try to reproduce and will get back to you soon

Thanks. The project was created with the multiplatform plugin for AppCode. If it helps, here I have the packed project (including the build folders for shared and iosApp)

Indeed, looks like it's broken at the moment. Thanks for reporting, please follow https://youtrack.jetbrains.com/issue/KMA-374

Ok, thanks for the info.