Is there any way how i can write bytes to a NativePtr?

CPointerVarOf<COpaquePointer>(nativePtr)

gives me this Exception: Native interop types constructors must not be called directly I need a CValueRef<*> for memcpy

Is there any hope for being able to compile native windows executables, and native macos executables on linux?

Is there a way to get current line number in Kotlin/Native? I found few info about using Throwable Stack Trace, but that doesn't seem to be in K/N?

Does anyone know of any good benchmarks for Kotlin/native that are recent? I'm curious, because every time I look, I always run across the programming-language-benchmarks where the kotlin/native tests (that use the same code as the JVM) time out. Theoretically we should be able to maintain numbers similar to swift / go, but to-date I haven't seen anything close. The new memory model has had some time to mature, so I'm curious where we are now.

Can an iOS app consume multiple XCFrameworks that are generated by separate KMP projects? Is there any code duplication (kotlin stdlib) if it is possible?

I want to set up the

.konan

dir on CI/CD, so I can use the packaged

gcc

and

g++

to build a library . Is there a

konan

command line option, or a Gradle task, that I can use that will download and setup the

.konan

dir? Ideally without needing to compile some Kotlin source code.

Hi, I want to launch Ktor server on my Raspberry PI 3 ( linux arm64). It's possible with Kotlin/Native now?

I’m trying to build a library using the same gcc as Konan, so it’s compatible with Kotlin mingw_x64. On Windows in

./konan/dependencies/msys2-mingw-w64-x86_64-2/bin

I see •

cc.exe

•

gcc.exe

•

x86_64-w64-mingw32-gcc-9.2.0.exe

•

x86_64-w64-mingw32-gcc.exe

Is there any difference between them? Which should I use? They all have the same size (2140265).

I was reading the roadmap and I saw this from KT-55512

• Google is working on a new memory allocator that should improve runtime performance as well as memory consumption. This important work also opens a path to further optimizations.

Google is implementing the memory allocator for Kotlin/native? I mean - if that's what's happening, that's awesome, I'm just trying to make sure I'm understanding this correctly.

Hi, curious question, is there anyway in kotlin functions to force at least one of two attributes to be given? otherwise show a compile time error? example

fun foo(default: Int, a: Int = default) {
 //todo
}

//good case
foo(a = 5)
foo(default = 5)

//compilation error "at least one of the attributes should be provided"
foo()

Im trying to build a cinterop .def for Stripe Terminal, which is an XCFramework. From what I can find online my def file looks good but I am getting “Unresolved Reference” errors in the code that imports symbols from it Ive tried the setup from https://kotlinlang.org/docs/multiplatform-mobile-ios-dependencies.html#87bb9559 and run into the same issues save that with what I have below it also gets unresolved errors on the package Wondering if anyones got a better def file setup for xcframeworks or can spot obvious errors.

language = Objective-C
package = StripeTerminal
compilerOpts = -framework StripeTerminal -DNS_FORMAT_ARGUMENT(A)= -D_Nullable_result=_Nullable
linkerOpts = -framework StripeTerminal -framework CoreBluetooth -framework ExternalAccessory -framework CoreLocation -framework Security -framework Foundation

# M1 Simulator
compilerOpts.ios_simulator_arm64 = -FiOSLibs/StripeTerminal.xcframework/ios-arm64_x86_64-simulator/StripeTerminal.framework
linkerOpts.ios_simulator_arm64 = -FiOSLibs/StripeTerminal.xcframework/ios-arm64_x86_64-simulator/StripeTerminal.framework

# X86 Simulator
compilerOpts.ios_x64 = -FiOSLibs/StripeTerminal.xcframework/ios-arm64_x86_64-simulator/StripeTerminal.framework
linkerOpts.ios_x64 = -FiOSLibs/StripeTerminal.xcframework/ios-arm64_x86_64-simulator/StripeTerminal.framework

# Device
compilerOpts.ios_arm64 = -FiOSLibs/StripeTerminal.xcframework/ios-arm64/StripeTerminal.framework
linkerOpts.ios_arm64 = -FiOSLibs/StripeTerminal.xcframework/ios-arm64/StripeTerminal.framework

Hi guys, I’m trying to wrap some existing C++ code into a kotlin multiplatform library on windows x64, but I run into a link error:

error: LIBCMT.lib(std_type_info_static.obj): machine type x86 conflicts with x64

. I didn’t specify the LIBCMT.lib dependency anywhere in my build scripts, so it seems like a bug in the konan toolchain, which uses the wrong x86 version of LIBCMT.lib instead of x64 version, could anybody help me take a look into it? thanks! The attachment is my minimum reproduce project, run the

runDebugExecutableNative

gradle task could reproduce it. The C++ code static library is built by the

build_xlog_windows.bat

batch script. BTW, I’m using the latest 1.8.0 kotlin version, but I also tried 1.7.21, which also didn’t work.

C:\Users\Admin\source\kmp-windows-x64-repro>.\gradlew runDebugExecutableNative

> Task :linkDebugExecutableNative FAILED
e: C:\Users\Admin\.konan\dependencies\llvm-11.1.0-windows-x64-essentials/bin/clang++ invocation reported errors

The C:\Users\Admin\.konan\dependencies\llvm-11.1.0-windows-x64-essentials/bin/clang++ command returned non-zero exit code: 1.
output:
lld-link: error: LIBCMT.lib(std_type_info_static.obj): machine type x86 conflicts with x64
lld-link: error: LIBCMT.lib(delete_scalar_size.obj): machine type x86 conflicts with x64
lld-link: error: LIBCMT.lib(delete_scalar.obj): machine type x86 conflicts with x64
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

FAILURE: Build failed with an exception.

Would the K/N team accept contributions to fix running against a dynamically-linked LLVM? I'm attempting to package kotlin-native for nixpkgs, and they have a particular LLVM build that's difficult to coerce into creating a static library. The main change is a complete rework of libclangstubs' signal chaining mechanism on Linux, basically parsing the ELF dynamic section to locate the correct symbol to redirect in libLLVM. Right now it crashes because we iterate through all addresses in the GOT for libLLVM with no bounds check, when the actual symbol we need to patch lives in libclang on a dynamically-linked .so.

Hey, is there someone who can help with cinterop and pointers ? 🙂 there is external declaration:

fun EVP_MAC_CTX_set_params(ctx: CValuesRef<EVP_MAC_CTX>?, params: CValuesRef<OSSL_PARAM>?): <http://kotlin.Int|kotlin.Int>

(params is a reference to an array) example of usage in C is here https://www.openssl.org/docs/man3.0/man3/EVP_MAC_init.html (in the end of the page). I’ve tried to something like this, and it compiles and works without errors on runtime, but looks like it doesn’t work as expected, as those

params

are not visible by `openssl`…

val mac = EVP_MAC_fetch(null, "HMAC", null)
val context = EVP_MAC_CTX_new(mac)

val params = allocArrayOf(
    OSSL_PARAM_construct_utf8_string("digest", "SHA256".cstr, 0).ptr,
    OSSL_PARAM_construct_end().ptr
)
check(EVP_MAC_CTX_set_params(context, params[0]) == 1) // works, returns 1

check(EVP_MAC_CTX_get_mac_size(context) > 0) // fails, but should not

The error is

error:0300009F:digital envelope routines::message digest is null

- so looks like it don’t see

digest

key in

params

array for some reason Where I could dig to understand what I do wrong? Thx in advance! 🙂

How can

kotlin.native.binary.sourceInfoType=libbacktrace

be enabled for Linux and Apple targets, but disabled for Windows, since it doesn't work for MinGW?

There is a new officially list of supported native targets, with support in kotlinx (soon) , and it finally includes linuxArm64: https://kotlinlang.org/docs/native-target-support.html

📢 Update Regarding Kotlin/Native Targets Kotlin/Native supports many targets – 27 as of 1.8.0, to be exact! While most of the heavy lifting is already being done by LLVM, we still have a lot of work to do. At the beginning of the Kotlin/Native project, we explored the possibilities and limits of the technology by adding different, sometimes exotic, targets. With the Stable release approaching, we, unfortunately, have to admit that we can’t support all targets equally well. Please, read this update regarding Kotlin/Native targets to find out our plans for supporting individual targets.

👋 any known workaround to this K/N problem? Let’s say I have a function like this

fun foo(map: Map<String, SomeDataClass?>)

When I try to use it from Swift,

SomeDataClass?

has the type

Any

:

func foo(map: [String: Any])

which forces me to downcast

I'm considering to write a windows DLL using Kotlin native (I haven't used Kotlin for some years and have no experience with Kotlin native). I do not need to do anything fancy like concurrency. It is just meant for calculations. I haven't decided if it needs to access a database or not yet. I have heard that Kotlin native performance is not good. How bad is it exactly? I can live with worse than C++ or Kotlin running on a JVM... but if it is anywhere near Python-level bad performance then that would be a problem.

Is there currently a plan on when the Kotlin/Native runtime will be stabilized? I’d like to start a project that integrates with the Kotlin/Native runtime at the lowest level. I started it in Kotlin 1.5.10, but a lot changed very quickly, and it got to be too much work when a new Kotlin release came out. This will be a toy project, not a production library, so I really just need to wait until the runtime won’t see a lot of major changes as quickly.

Hi, Can anyone pls help, why this exception coming ? HttpClient: REQUEST .... failed with exception: io.ktor.client.engine.darwin.DarwinHttpRequestException: Exception in http request: Error Domain=NSURLErrorDomain Code=-1003 "A server with the specified hostname could not be found." UserInfo={_kCFStreamErrorCodeKey=8, NSUnderlyingError=0x280bcb3c0 {Error Domain=kCFErrorDomainCFNetwork Code=-1003 "(null)" UserInfo={_NSURLErrorNWPathKey=satisfied (Path is satisfied), interface: pdp_ip0[lte], ipv6, dns, expensive, _kCFStreamErrorCodeKey=8, _kCFStreamErrorDomainKey=12}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <B02333C6-72C2-4A9E-A718-25BF82992D6F>.<5>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <B02333C6-72C2-4A9E-A718-25BF82992D6F>.<5>" ), NSLocalizedDescription=A server with the specified hostname could not be found., NSErrorFailingURLStringKey=.., NSErrorFailingURLKey=.., _kCFStreamErrorDomainKey=12}

Hey everyone 👋, Running

linkPodDebugFrameworkIosFat

gives me

fatal error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo: /Users/moussa/Desktop/MoussaWork/Companies/IOHK/atala-prism-apollo/base-asymmetric-encryption/build/bin/iosArm64/podDebugFramework/ApolloBaseAsymmetricEncryption.framework/ApolloBaseAsymmetricEncryption and /Users/moussa/Desktop/MoussaWork/Companies/IOHK/atala-prism-apollo/base-asymmetric-encryption/build/bin/iosX64/podDebugFramework/ApolloBaseAsymmetricEncryption.framework/ApolloBaseAsymmetricEncryption have the same architectures (arm64) and can't be in the same fat output file

Error simplified,

iosArm64

&

iosX64

have the same architectures (arm64) and can’t be in the same fat output file. How do I investigate this error or at least try to figure out the root cause of that issue? Notes: • Using the iOS new hierarchy only

ios()

Hey everyone, Quick question: I’m new to using StateFlow, i got an data class object that holds a list of other data class,

private val _invoiceIntroFlowState: MutableStateFlow<InvoiceIntroFlowState> = MutableStateFlow(InvoiceIntroFlowState(customizationData = InvoiceCustomizationResponseEntity()))
val invoiceIntroFlowState: StateFlow<InvoiceIntroFlowState> = _invoiceIntroFlowState.asStateFlow()

data class InvoiceIntroFlowState(
    val uiStatus: UiStatus = UiStatus.NONE,
    val error: Failure? = null,
    val customizationData: InvoiceCustomizationResponseEntity
)

Any attempt to do any kind of deep-copy that i know doesn’t work for me to trigger the new state event:

_invoiceIntroFlowState.update { currentState ->
                currentState.copy(
                    customizationData = currentState.customizationData.copy(
                        logos = another //updatedLogos.map { it.copy() }
                    )
                )
            }

Any help will be highly appreciated

Hello. I am trying to build an aarch64 native app, but gradle seems to think I’m on x64 platform. What am I missing?

Although it does seem to build the right target:

Mach-O 64-bit executable arm64

Yet deps seems to be noted as x64 a lot…. Example…

(KonanProperies) Downloading dependency: <https://download.jetbrains.com/kotlin/native/apple-llvm-20200714-macos-x64-essentials.tar.gz> (0/94217229).

Would it be possible for K/N to have a pure bitcode target? From my very limited understanding of LLVM, it sounds like the main platform-specific parts of bitcode are in the form of linking external symbols, which may not be available on all platforms. It seems like it should be possible to compile and publish a library as raw bitcode, which would be helpful as new targets get added in the future.

Hey, I am getting a weird error with a work project. Most of my co-workers use Macs and I use a Windows machine, and it seems like a windows specific bug. The main issue is that when I try to sync, the C interop commonizer task fails with a command too long error. More info in thread

I don't suppose there are any plans from jetbrains to include winrt for windows with mingw as a platform option?

I noticed that the K/N samples are no longer in the github. There's a readme saying they were moved, but I don't see the samples anywhere on the site linked. The samples (especially videoplayer) were very helpful in learning. I see them in the backend tests, so they still exist and presumably compile. Why wouldn't it link there?