I have a bytearray of UTF-16 encoded bytes read from a cinterop library COpaquePointer, and need to convert the ByteArray to a String. But native doesn't seem to have Charsets much less Charsets.UTF_16. ByteArray.toKString() is for UTF8. Is there some simple way to do this? My searches are sucking 🙂

Is my understanding correct that the

spec.name

of a generated podspec can't be changed?

For one of my projects, I'm trying to compile without stdlib. I created a file (test.kt) with the following code

fun main() {
	
}

and tried compiling it with

konanc -nostdlib test.kt

. I get the following errors:

error: could not load module <org.jetbrains.kotlinx.kotlinx-cli>

error: compilation failed: Kotlin IR Linker exception

Has anyone tried compiling with the nostdlib option?

hello 👋 i wanted to try to compile kotlin to wasm the documentation points to an executable named

kotlinc-native

https://kotlinlang.org/docs/native-command-line-compiler.html but i’ve installed kotlin with homebrew and i don’t see

kotlinc-native

in the available binaries

$ls /usr/local/Cellar/kotlin/1.6.10/bin

kapt          kotlin        kotlin-dce-js kotlinc       kotlinc-js    kotlinc-jvm

do i need something additional? or is an issue with the homebrew recipe?

Hi I have an iOS framework that fails to link on arm32 in debug mode without

-opt

enabled Do you think I should file a bug ?

Any particular reason why the binding for sfRenderWindow does not get generated? I can use (most?) of csfml from kotlin native, I even have the sfWindow, but no sfRenderWindow, and can't find why My libsfml.def :

# SFML/Audio.h SFML/Graphics.h SFML/Network.h SFML/System.h SFML/Window.h
headers = SFML/Graphics.h \
          SFML/System.h \
          SFML/Window.h
headerFilter = SFML/**

compilerOpts.linux = -I/usr/include -I/usr/include/x86_64-linux-gnu

# -lcsfml-audio -lcsfml-graphics -lcsfml-network -lcsfml-system -lcsfml-window
linkerOpts.osx = -L/opt/local/lib -lcsfml-graphics -lcsfml-system -lcsfml-window
linkerOpts.linux = -L/usr/lib/x86_64-linux-gnu -lcsfml-graphics -lcsfml-system -lcsfml-window

I've got a KMM framework with native stuff targeting Mac and IOS built and am learning Swift-calling-Kotlin. I have a question about the experimental async/suspend support when calling suspend functions that have suspend lambdas from swift. Say I have a Kotlin function like this:

suspend fun anyname(arg1:String, block: suspend (arg) -> Unit)

. What is the best way to invoke this from swift? I'm watching some unresolved issues in Youtrack (https://youtrack.jetbrains.com/issue/KT-47610 ) on making this better, but with current swift and kotlin 1.6.10 am having trouble figuring out if there is a non-messy way to do this. Specifically the best way to code the

block

lambda above in the Swift call of

anyname("xxx") { arg -> ... }

. I'm currently playing with using a class that implements the kotlin-generated swift protocol

KotlinSuspendFunction1

which has an

invoke

function that is getting called with arg1: Any? and a completionHandler. Is that the best/only way to make this work, or am I going down a rabbit hole since I'm a Swift newbie? If anyone can point me to an example of doing this better, I'd appreciate it. I guess the real answer I'm asking for is whether this is even a good thing to try to do from Swift until it gets improved 🙂. Thanks in advance for any tips/links.

is there a way to package resources like a json file inside a .kexe or .exe

I’m using the new Garbage Collector, and in my code I was unintentionally allocating a large UIntArray (~1.3MB) in a loop. The array was only referenced inside the loop. I got a crash on iOS and the stack trace shows that the symbol is

kotlin::mm::internal::ObjectFactoryStorage<8ul, kotlin::mm::internal::AllocatorWithGC<kotlin::mm::internal::SimpleAllocator, kotlin::gc::SameThreadMarkAndSweep::ThreadData> >::Node::~Node:

and the error is

Thread 1: EXC_BAD_ACCESS (code=1, address=0xff000000ff000000)

How can I confirm if this is a GC bug?

Hello mates! Is there a possibility to annotate kotlin

companion object

somehow, so I can use it without additional

Companion()

call from Swift. Seen this one: https://youtrack.jetbrains.com/issue/KT-44862. May be some workaround here?

Hi folks. we are seeing some

Attempted to dereference garbage pointer

exceptions in iOS with a few different stack traces, and we are unable to reproduce it. We do a lot of passing objects around between swift and kotlin native, and I don't feel like I have a good handle on how the memory management works in cases where an object originates in kotlin and gets passed into swift, or situations involving lambdas/closures that should be holding on to things. I have a hunch that these issues are related to issues with how we are handling this though. Does anyone know where I can find detailed documentation of how these situations work, or have any info about potential causes of this error when interoping with kotlin native? I have of course read the main kotlin pages like https://kotlinlang.org/docs/native-objc-interop.html.

Any ideas, what can be wrong? If i disable bitcode in xcode - build is successfull. What is advantage of building with bitcode vs without bitcode?

Hello, is anyone with problems with kotlin native debugger in Intellij Idea? I tried in a fresh installation in a windows machine, but didn't success, and tried in a linux machine, both with the latest version, but in linux I tried with EAP, I have installed the Native Debugger Support, should I create an issue in youtrack or something like this?

Hello, I'm trying to use kotlin/native to build a simple .dll, but the resulting .dll is a 2MB file full of zeros, I cannot understand what I'm doing wrong. Here you can find a project that should reproduce the problem: https://github.com/francescopedronomnys/jni-dll-wrapper The gradle tasks I've tried are :linkNative and :build, both producing that empty .dll file. Just to explain the commented code you will find on the repo: my final goal is to wrap an existing .dll in another .dll that will expose JNI functions that will be used by a kotlin/jvm project using Compose as GUI. Thank you

can I force kotlin native to use a slightly older version of xcode?

How do I link and include a static library? The only "documentation" I can find is vague mentions of stuff on youtrack and files on github that don't exist anymore, e.g. https://github.com/JetBrains/kotlin-native/blob/master/FAQ.md#q-how-do-i-create-a-static-library-or-an-object-file

I’m currently using cinterop on a project. I have the .def file set up for the OSs and architectures that I need for devices, but I’m wanting to set up an Arm64 simulator now for M1 Mac. Is there a list of the names supported for identifying OS and architecture (such as android_arm32, android_x64, ios_arm64, etc)? I can’t seem to find the name that matches iosSimulatorArm64.

With the Kotlin Native documentation it would be good to have an article that provides guidance on how to wrap/manage C libraries with Kotlin Native libraries (especially if multiple related libraries are involved). Using the LVGL KT ( https://gitlab.com/embed-soft/lvgl-kt ) libraries as an example they are structured like the following:

Core (depends on LVGL C lib); targets linuxX64 & linuxArm32Hfp
  |> Drivers (depends on LVGL & LV Drivers C libs); targets linuxX64 & linuxArm32Hfp
        |> SDL 2 (depends on LV Drivers & SDL 2 C libs); targets linuxX64

If the LVGK KT Widgets library existed then the structure would look like this:

Core (depends on LVGL C lib); targets linuxX64 & linuxArm32Hfp
  |> Widgets (depends on LVGL C lib); targets linuxX64 & linuxArm32Hfp
  |> Drivers (depends on LVGL & LV Drivers C libs); targets linuxX64 & linuxArm32Hfp
        |> SDL 2 (depends on LV Drivers & SDL 2 C libs); targets linuxX64

Apparently there is an issue where Kotlin compiler caching can fail when the same C library is used in multiple Kotlin Native libraries that are used by a Kotlin Native program: https://youtrack.jetbrains.com/issue/KT-51190

Hey folks, is there any documentation on adding a

.xcframework

to a kotlin native project?

Hi everyone, I have a somewhat strange problem: up until now I’ve used the cocoapods plugin in combination with

isStatic = true

to integrate our shared module into the iOS app. However, I now have to make shared dynamic due to some third party library issue which can only be worked around with that due to this Kotlin native issue: https://youtrack.jetbrains.com/issue/KT-50982#focus=Comments-27-5741956.0-0 Apart from that, it seems that using dynamic frameworks is the preferred way anyway, so I am generally fine with that workaround:

cocoapods {
        ios.deploymentTarget = "14.1"

        framework {
            summary = "Shared Module"
            baseName = "shared"
            isStatic = false
            embedBitcode(BITCODE)
            podfile = project.file("../iosApp/Podfile")
        }
    }

All is good and well and the app builds as it should until I try to export the archive which now fails with the following error message:

shared not found in dylib search path

Any idea what I might need to change to make this work?

I'm seeing mentions of JNI in https://github.com/JetBrains/kotlin/blob/f5e4c72f063608220d64da81e0fc6be5c17505fc/[…]etbrains/kotlin/native/interop/gen/SimpleBridgeGeneratorImpl.kt Does this mean that the interop tool actually has partial support for JVM bindings?

Hey, I try to build https://github.com/JetBrains/kotlin/tree/master/kotlin-native/tools/benchmarksAnalyzer and have not played with Kotlin/Native for a very long time so sorry if those are basic questions. When importing the project in IDEA, I had both

import platform.posix.*

and

import libcurl.*

in red (unresolved reference) in

kotlin/kotlin-native/tools/benchmarksAnalyzer/src/main/kotlin-native/org/jetbrains/analyzer/Utils.kt

. I found in Kotlin Native README that I had to run

./gradlew :kotlin-native:dist :kotlin-native:distPlatformLibs

at the root of the

kotlin

project to get

import platform.posix.*

resolving. This part is now fixed. But I am blocked for libcurl:

> Task :compileNativeMainKotlinMetadata FAILED
e: /home/seb/playground/kotlin/kotlin-native/tools/benchmarksAnalyzer/src/main/kotlin-native/org/jetbrains/analyzer/Utils.kt: (10, 8): Unresolved reference: libcurl

I have libcurl installed (Archlinux) and headers are in

/usr/local/include

. I tried to modify the build to specify `compilerOpts '-I/usr/local/include'`:

fromPreset(presets.linuxX64, 'linux') {
            compilations.main.cinterops {
                libcurl {
                    compilerOpts '-I/usr/local/include'
			        includeDirs.headerFilterOnly '/usr/include', '/usr/local/include'
                }
            }
        }

But still the same error. When I try to build the project with

gradle build

I get:

> Task :compileNativeMainKotlinMetadata FAILED
e: /home/seb/playground/kotlin/kotlin-native/tools/benchmarksAnalyzer/src/main/kotlin-native/org/jetbrains/analyzer/Utils.kt: (10, 8): Unresolved reference: libcurl

The command

gradle cinteropLibcurlLinux

seems to run properly and invokes

cinterop -o /home/seb/playground/kotlin/kotlin-native/tools/benchmarksAnalyzer/build/classes/kotlin/linux/main/cinterop/benchmarksAnalyzer-cinterop-libcurl.klib -target linux_x64 -def /home/seb/playground/kotlin/kotlin-native/tools/benchmarksAnalyzer/src/nativeInterop/cinterop/libcurl.def -compiler-option -I/usr/local/include -Xmodule-name benchmarksAnalyzer-cinterop-libcurl

which seems to work fine. Could somebody point me to what I am missing to get libcurl resolving both in IDEA and with

gradle build

?

For what reason does Konan require ncurses? I had a native build failing with

> Task :runtime:linkDebugTestLinuxX64
e: Unable to compile C bridges

> Task :runtime:linkDebugTestLinuxX64 FAILED

FAILURE: Build failed with an exception.

Which took a while to debug that it was an issue with the compiler itself, and not the code I was compiling.

is there a way to call a kotlin suspend function from a flow collector in swift? i tried wrapping the call to the suspend function in a swift Task but get an error saying suspend functions can only be called from the main thread, even though I try to use

withContext

in my suspend function. If I try to use

DispatchQueue.main.async

it complains about passing a function type

() aync ->()

to a param expecting sync function type. I'm using the experimental native memory model in my kotlin module btw.

we know kotlin/native use LLVM backend for native target, how could we set optimize-level for native target, like -O0, -O3, -Oz?

Hi! I'm just trying out my first Kotlin native project … and now I have a problem when writing tests: I can't seem to access any of my test resources. Turns out, when I run

./gradlew nativeTest

the task

nativeTestProcessResources

is actually never executed. Why is that?

hi guys, i've been trying to run a

maxosX64

target project on my apple silicon mac, and everything with the build goes fine, but the

run

task keeps getting skipped.

> Task :app:compileKotlinMacosX64 UP-TO-DATE
> Task :app:linkDebugExecutableMacosX64 UP-TO-DATE
> Task :app:runDebugExecutableMacosX64 SKIPPED

any ideas? I've tried on multiple projects and running a clean build. kotlin

1.6.10

running with

./gradlew runDebugExecutableMacosX64

I have no idea how to include kotlinx's serialization package in a kotlin-native project. Is someone willing to walk me through it? I did do around 3 hours of search and tinkering around but couldn't get it

Hi all, check out pic...how can I run 'hello.kt'

any suggestions for something similar to java's 

ByteBuffer

 that is kotlin native friendly? I found there is something similar inside 

kotlinx.serialization

 so I might just copy that file in https://github.com/Kotlin/kotlinx.serialization/blob/v0.9.1/runtime/native/src/main/kotlin/kotlinx/io/Buffers.kt