Hi, My iOSFramework size is ~15mb when generated using kotlin multiplatform. Not sure if it is normal to have large framework file size since it looks like it is on a higher side.

Which folders of .konan would you cache on a ci server?

Hi, I have a question about native C consuming a KN shared lib. I am reviewing the code in the 'produce_dynamic' test and noticed this: https://github.com/JetBrains/kotlin-native/blob/master/backend.native/tests/produce_dynamic/simple/main.c#L38

T_(Data) data = __ kotlin.root.getMutable();

Why is this object not released via

DisposeStablePointer()

like the other objects returned from the KN side? (@olonho/@svyatoslav.scherbina ?)

Is it possible to remove a target? I use the

watchos

shortcut but don't want the new

watchosx64

that gets added on 1.3.0 because the stable versions of serialization and ktor don't support it yet.

Hey guys, I just came across at this zephyr repo. I know that kotlin-native doesn't support [no-std] targets out of the box, but is there a way to configure it (since it uses LLVM under the hood anyways)? What I'm talking about is something like Creating Custom Targets for Rust guidelines.

After migrate I’ve had a problem. macOS target

e: Compilation failed: Backend Internal error: Exception during IR lowering
File being compiled: /Users/atomin/Documents/iq/xpoint-sdk/sdk/src/commonMain/kotlin/com/inventale/xpoint/sdk/Checker.kt
The root cause java.lang.AssertionError was thrown at: org.jetbrains.kotlin.ir.overrides.FakeOverrideBuilderStrategy.fakeOverrideMember(IrOverridingUtil.kt:43)

 * Source files: 
 * Compiler version info: Konan: 1.4.30 / Kotlin: 1.4.30
 * Output kind: PROGRAM

e: org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering
File being compiled: /Users/atomin/Documents/iq/xpoint-sdk/sdk/src/commonMain/kotlin/com/inventale/xpoint/sdk/Checker.kt
The root cause java.lang.AssertionError was thrown at: org.jetbrains.kotlin.ir.overrides.FakeOverrideBuilderStrategy.fakeOverrideMember(IrOverridingUtil.kt:43)
        at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException(CodegenUtil.kt:239)
        at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException$default(CodegenUtil.kt:235)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(PhaseBuilders.kt:124)
...
Caused by: java.lang.AssertionError: Unexpected variance in super type argument: in @0
        at org.jetbrains.kotlin.ir.overrides.FakeOverrideBuilderStrategy.fakeOverrideMember(IrOverridingUtil.kt:43)
        at org.jetbrains.kotlin.ir.overrides.IrOverridingUtil.buildFakeOverridesForClassUsingOverriddenSymbols(IrOverridingUtil.kt:168)
        at org.jetbrains.kotlin.backend.common.ir.IrUtilsKt.addFakeOverrides(IrUtils.kt:487)
        at org.jetbrains.kotlin.backend.common.ir.IrUtilsKt.addFakeOverrides$default(IrUtils.kt:485)

I can’t share project source. How can I fix the problem?

question, is is possible to retrieve data already stored in NSData using pure kotlin common and a library? I'm not an IOS-developer, but I want to convince to switch...

Is there a way to set the Konan

osVersionMin.ios_x64

and

osVersionMin.ios_arm64

on a per-project basis (rather in

~/.konan

) ?

Anyone have any clue as to why SDL_CreateThread is set as deprecated and can not be used in the https://github.com/JetBrains/kotlin-native/tree/master/samples/tetris example under windows with mingwx64?

What is the correct way to start a new app based off the samples in https://github.com/JetBrains/kotlin-native/issues?q=is%3Aissue+is%3Aopen+ ? I successfully built and ran the UIKit sample in place, and then copied that dir out. However, it relies on the gradlew in the parent dir. What is the expected way to use these samples in a standalone manner? There is a note about building from a dist archive, is the expectation that you unpack a sample archive from the dist dir and build new apps off that? Forgive my inexperience here with gradle and general setup - thus why I'm doing this to learn.

I am trying to convert this bit of code into kotlin

- (NSString *)hmacsha1:(NSString *)data secret:(NSString *)key {

    const char *cKey  = [key cStringUsingEncoding:NSASCIIStringEncoding];
    const char *cData = [data cStringUsingEncoding:NSASCIIStringEncoding];

    unsigned char cHMAC[CC_SHA1_DIGEST_LENGTH];

    CCHmac(kCCHmacAlgSHA1, cKey, strlen(cKey), cData, strlen(cData), cHMAC);

    NSData *HMAC = [[NSData alloc] initWithBytes:cHMAC length:sizeof(cHMAC)];

    NSString *hash = [HMAC base64String];

    return hash;
}

This is currently what I have

actual fun generateHmacSha1Signature(key: String, value: String): String = memScoped{
    val nsKey = NSString.create(string = key)
    val nsValue = NSString.create(string = value)
    val encodedKey = nsKey.cStringUsingEncoding(NSUTF16StringEncoding)
    val encodedValue = nsValue.cStringUsingEncoding(NSUTF16StringEncoding)

    val cHMAC = ByteArray(CC_SHA1_DIGEST_LENGTH)

    CCHmac(kCCHmacAlgSHA1, encodedKey, strlen(encodedKey?.toKString()), encodedValue, strlen(encodedValue?.toKString()), cHMAC.asUByteArray().toCValues())

    val data:NSData = NSData.create(bytes = allocArrayOf(cHMAC), length = cHMAC.size.toULong())

    return data.base64EncodedStringWithOptions(NSDataBase64DecodingIgnoreUnknownCharacters)
}

The problem with what I have though is that it does not seem to be generating a correct SHA1 signature. I get

AAAAAAAAAAAAAAAAAAAAAAAAAAA=

as a value when I use it. The part that don't think is correct is the

CCHmac

because I was not sure if I was getting the string length correctly and the

cHMAC

ByteArray correctly. Can anyone tell me where I went wrong?

What’s the future of KotlinNative? Are any platform libraries planned for the future? (ie: accessing files and things of that sort). I’d love to use Kotlin as an alternative to C/C++/Go/Rust

Hello, I just started using Kotlin/Native and I'm a bit confused with how I can turn a CValue<T> into T. I know useContents exist but is there a more practical way of doing this?

val result: CValue<Thing> = my_c_function_call()
val resultButRealThisTime: Thing = ???

Doing

val result = my_c_function_call()
val resultButReal: Thing? = null
result.useContents { resultButReal = this@useContents }

Works, but looks awful and I don't think that's how you're supposed to do that

Hello! I'm looking into Kotlin/Native and wanted to use

cglm

library (https://github.com/recp/cglm) for supporting OpenGL maths. Though, I have some problems with it. Details in 🧵.

Hello! I'm working on a GTK library in kotlin native. It's been difficult as I have been mostly stumbling upon solutions at random. I have the following code

val int1: CValue<IntVarOf<Int>> = cValue()
val int2: CValue<IntVarOf<Int>> = cValue()

gtk_window_get_default_size(
	window = windowPointer,
	width = int1,
	height = int2
)

gtk_window_get_default_size

takes in a pointer to the window, then a pointer to `Int`s that it will populate. How can I get the

Int

out of

CValue<IntVarOf<Int>>

?

Hello! On my project, I make UseCases in Kotlin and execute UseCase’s

execute

method from APP to get value. The return values from UseCases are defined as Results, and puts it in Output of UseCase, and returns it to my APP. Define of Results:

sealed class Results<out T, out S> {
    class Success<out T>(val data: T) : Results<T, Nothing>()
    class Failure<out S>(val cause: S) : Results<Nothing, S>()
}

Sample useCase and it’s IO:

interface SampleUseCaseInterface {
    suspend fun execute(): sampleUseCaseIO.Output
}

class sampleUseCase() : SampleUseCaseInterface {
    override suspend fun execute(): sampleUseCaseIO.Output =
        sampleUseCaseIO.Output(Results.Success("success!"))
}

class sampleUseCaseIO {
    data class Output(val results: Results<String, Error>)
}

Now, I want to mock the execute method of UseCase and return an arbitrary Output in order to write a Unit Test in an iOS app. However, now the following error is displayed and it is not possible to create an arbitrary output. Both data and error are required to be included in Results, and the required Output cannot be created. Is there any way to avoid this? Also, is it possible to realize a mechanism like Either on the iOS side with Kotlin/Native?

Is it possible to consume Swift Packages (XCFramework) with the MPP Cocoapods plugin?

This true?

Is there any general guidance on debugging`kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen` issues? I'm getting this upon instantiating a class; during static initialisation! I cannot see how on earth this is 'concurrent' modification when the object is just in the process of being initialised itself 😞

I try to notarize my macOS application. I’ve done

codesign -dvv --force --timestamp --sign ***

for all dylib’s and my kexe with a

Mac App Distribution

certificate Next I’ve signed

productsign --sign

and

codesign -dvv --force --timestamp --sign

with a

Mac Installer Distribution

certificate And the last:

xcrun altool --notarize-app --primary-bundle-id "ID"

- AppID configuration. After this in the log I see

{
      "severity": "error",
      "code": null,
      "path": "MY.pkg xpoint-sdk.kexe",
      "message": "The binary is not signed with a valid Developer ID certificate.",
      "docUrl": null,
      "architecture": "x86_64"
    },
   {
      "severity": "error",
      "code": null,
      "path": "MY.pkg .../xpoint-sdk.kexe",
      "message": "The executable does not have the hardened runtime enabled.",
      "docUrl": null,
      "architecture": "x86_64"
    }
...
   {
      "severity": "error",
      "code": null,
      "path": "MY.pkg .../some.dylib",
      "message": "The binary is not signed with a valid Developer ID certificate.",
      "docUrl": null,
      "architecture": "x86_64"
    }

How can I fix it?

Hi! Any example of receiving a function pointer with Kotlin method?

And how can I use ByteArray?

e: /home/commandertvis/IdeaProjects/communicator/communicator-zmq-c-transport/src/nativeMain/kotlin/Server.kt: (22, 43): type @[ParameterName(name = 'argument')] kotlin.ByteArray  is not supported here: doesn't correspond to any C type

Is it a Native only behavior, or is it temporary?

Any advice for debugging:

Uncaught Kotlin exception: kotlinx.coroutines.CoroutinesInternalError: Fatal exception in coroutines machinery for DispatchedContinuation[WorkerCoroutineDispatcherImpl@d81448, Continuation @ $collect_2COROUTINE$220]. Please read KDoc to 'handleFatalException' method and report this incident to maintainers

This is when one of my Flows ends; everything is in the main thread... 😱

Just saw that Kotlinx Coroutines 1.4.3 has been released (https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.4.3) ....usual follow on question re. when

native-mt

version will be available? 🙂

Hello everyone! As some of you might know, in 1.3.70 we added support for compiler caches for

macosX64

and

iosX64

targets. Long story short, compiler caches make compilation time of debug builds (e.g.

linkDebug...

) in Gradle significantly faster (well, except the first one, when dependencies are caching and Gradle daemon is warming up). In 1.5.0-M1 we add opt-in support for compiler caches for two more targets: •

iosArm64

•

linuxX64

(only on Linux host) To enable them add a single line to your

gradle.properties

. For

linuxX64

target:

kotlin.native.cacheKind.linuxX64=static

For

iosArm64

target:

kotlin.native.cacheKind.iosArm64=static

"Why not enable it by default?" you might ask. While it doesn't break our test projects, it might break yours. And who likes broken compilation after compiler update? :) So, we asking you to test compiler caches on your projects and report to us if you encounter any kind of problems. Let's make Kotlin faster together!

I ran into real weirdnesses with an combined apple source set for watchos and ios because the NSInteger is a long on ios and an int on watchos. This made me write really strange code like this:

internal fun NSInteger.toInt(): Int {
  return asInt()
}

private fun Any.asInt(): Int {
  return when (this) {
    is Long -> this.toInt()
    is Int -> this
    else -> error("Could not convert $this to Int")
  }
}

Is there a better way to do that? I’m kind of looking for the opposite of cinterop.convert.

Will Kotlin/Native's 1.5-M1 tag be getting release notes?

I still don’t understand the types of kotlin native. According to this table https://github.com/JetBrains/kotlin/blob/06498c0efdb218da4bd1b09b6ae0b98beb8b7af9/native/utils/src/org/jetbrains/kotlin/konan/target/KonanTarget.kt

...
    object WATCHOS_ARM32 : KonanTarget("watchos_arm32", Family.WATCHOS, Architecture.ARM32)
    object WATCHOS_ARM64 : KonanTarget("watchos_arm64", Family.WATCHOS, Architecture.ARM64)
...

And this https://github.com/JetBrains/kotlin/blob/06498c0efdb218da4bd1b09b6ae0b98beb8b7af9/native/utils/src/org/jetbrains/kotlin/konan/target/Architecture.kt

enum class Architecture(val bitness: Int) {
 ...
    ARM64(64),
    ARM32(32)
,...
}

watchosarm32 is 32 bit and watchosarm64 is 64 bit. However when I now take a look at my

watchosArm32Main

source set, for example

NSDateComponents

have `NSInteger`s which will be interpreted as kotlin ints. Makes sense to me. Now however in

watchosArm64Main

it’s also an Int. Why is that? Why isn’t this now a

Long

? Apparently all ios source sets have longs, all watchos source sets have ints. I thought this is dependent on the bitness?

Hi all I am having trouble with an object getting frozen in its

init

block and then top level value assignments causing an exception. heres a min example:

class Foo(bar: Bar) {
    init {
        CoroutineScope(Dispatchers.Default).launch { 
            bar.buzz()
        }
    }
    
    val a = 3
}

in the init block since bar is accessed, it seems like that is causing the entire foo object to also get frozen then when it gets to

val a = 3

during runtime - it complains about foo instance already being frozen. how can i go about fixing this?