Kotlin/native cinterop build problem with gradle - ios

Question

I'm experimenting with Kotlin native and iOS. I tried to use the example at raywenderlich as a starting point. This example is a bit old , so I have updated the code to fit the Kotlin multiplatform 1.3.61. I'm using AppCode to build the code.
I'm struggling with the Kotlin DSL gradle file ( build.gradle.kts) , the example is using build.gradle :
plugins {
id "org.jetbrains.kotlin.platform.native" version "1.3.0"
}
components.main {
def productsDir = new File("").absolutePath
targets = ['ios_arm64', 'ios_x64']
outputKinds = [EXECUTABLE]
allTargets {
linkerOpts '-rpath', '#executable_path/Frameworks'
linkerOpts "-F${productsDir}"
}
dependencies {
cinterop('AFNetworking'){
packageName 'com.afnetworking'
compilerOpts "-F${productsDir}"
linkerOpts "-F${productsDir}"
includeDirs{
allHeaders "${productsDir}/AFNetworking.framework/Headers"
}
}
}
}
task copyExecutable() {
doLast {
def srcFile = tasks['compileDebugIos_x64KotlinNative'].outputFile
def targetDir = getProperty("konan.configuration.build.dir")
copy {
from srcFile.parent
into targetDir
}
}
}
I have tried to translate this into the build.gradle.kts file of my own :
plugins {
kotlin("multiplatform") version "1.3.61"
kotlin("xcode-compat") version "0.2.5"
}
repositories {
mavenCentral()
}
kotlin {
val productsDir = "/Users/trond/Desktop/native_meteor/native_meteor/"
iosX64("ios")
{
compilations.getByName("main")
{
val myInterop by cinterops.creating {
defFile(project.file("src/nativeInterop/cinterop/afnetworking.def"))
packageName ("com.afnetworking")
compilerOpts ("-F${productsDir}")
// linkerOpts ("-F${productsDir}")
// 3
includeDirs{
allHeaders ("${productsDir}/AFNetworking.framework/Headers")
}
}
}
}
xcode {
setupApplication("native_meteor")
}
}
From what I can see the cinterops tool is doing it's job and is creating a klib file and a afnetworing.kt ( build/classes/kotlin/ios/main/..... )
But the I'm not able to use the library AFNetworking! I try to add the import directive in the ViewController.kt file :
import com.afnetworking.*
But this is not recognized. This results in that the project is not building :
> Task :native_meteor:compileKotlinNative_meteor FAILED
e: /Users/trond/Desktop/native_meteor/native_meteor/src/native_meteorMain/kotlin/ViewController.kt: (15, 8): Unresolved reference: com
e: /Users/trond/Desktop/native_meteor/native_meteor/src/native_meteorMain/kotlin/ViewController.kt: (37, 23): Unresolved reference: AFHTTPSessionManager
e: /Users/trond/Desktop/native_meteor/native_meteor/src/native_meteorMain/kotlin/ViewController.kt: (40, 38): Unresolved reference: AFJSONResponseSerializer
Anyone that can shed some light on this ?

Answer 1

Maybe it will make sense to check the contents of your result .klib to make sure you use the correct package name. It can be done using ~/.konan/kotlin-native-macos-1.3.61/bin/klib CLI tool. Also, I would recommend you to take a look at this sample from the Kotlin/Native Github, it also utilizes AFNetworking and uses the latest compiler version.

Answer 2

Thank you for pointing me in that direction. I investigated the .klib file, and I discovered that it contained the package that I expected. I then took a look at the Gradle sourcsets that I had in the Gradle pane in Appcode. Here I discovered that the .klib library was defined under "iosMain" and not "native_metorMain". I then found out that the line iosX64("ios") should be iosX64("meteor_main").
After that I got an error : "ld: framework not found AFNetworking" when I tried to compile in XCode. I then added -F{full path to framework} for the linkerOpts ( linkerOpts= -F{full path to framwork} -framework AFNetworking ) in the afnetworking.def file.
Now the project builds successfully.