kotlinlang #kotlin-native

Hi Everyone, I am trying work with inotify on linux ( https://man7.org/linux/man-pages/man7/inotify.7.html ) it appears that Kotlin Native (1.5.10) C interop does support the inotify header, but the helper class mapping

inotify_event

struct does not have any of it’s members. Has anyone encountered this issue before ?

➕ 2

Sterling Albury

08/30/2021, 12:51 AM

hey all, I’m trying to add a new hardware target for konan, so I put the new target description in

.konan/platforms/zephyr

and rebuilt the compiler but I’m not seeing it show up in konanc -list-targets
. I should be seeing it show up with

-list-targets

, no? I’m not seeing the

stm32f4_disco

target show up either. when I try to compile a program for my target or the

stm32f4_disco

target I get this error:

» konanc hello.kt -target zephyr_stm32f4_disco                                                                                                                               
error: compilation failed: Target zephyr_stm32f4_disco is not available on the macos_x64 host

 * Source files: hello.kt
 * Compiler version info: Konan: 1.6.0-dev / Kotlin: 1.6.255
 * Output kind: PROGRAM

exception: java.lang.IllegalStateException: Target zephyr_stm32f4_disco is not available on the macos_x64 host
	at org.jetbrains.kotlin.backend.konan.KonanConfig.<init>(KonanConfig.kt:95)
	at org.jetbrains.kotlin.cli.bc.K2Native.doExecute(K2Native.kt:79)
    ...

I’ve been able to build and flash zephyr for my target boards. can I not build my kotlin program for these targets on a mac?

spierce7

08/30/2021, 6:22 AM

I’m building an executable that runs on MacOS. I’m using a dynamic library and no matter what I do, it’s looking for that library at

/usr/local/lib/

1. How do I tell get the dynamic library to load a file in a relative path to the

.kexe

executable? 2. If #1 isn’t possible, is it possible to embed a dynamic library into the

.kexe

atsushieno

08/30/2021, 10:31 AM

Anyone experienced this sort of "gradle sync issues" that occurs on IDEA but not with gradlew (directly) ? https://gist.github.com/atsushieno/d614c3ac8bb85bea3d035ce4577fa32e

org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':commonizeNativeDistribution'.

Caused by: java.lang.ClassCastException: class org.jetbrains.kotlin.gradle.dsl.KotlinJvmProjectExtension_Decorated cannot be cast to class org.jetbrains.kotlin.gradle.dsl.KotlinProjectExtension (org.jetbrains.kotlin.gradle.dsl.KotlinJvmProjectExtension_Decorated is in unnamed module of loader org.gradle.internal.classloader.VisitableURLClassLoader @34f47f71; org.jetbrains.kotlin.gradle.dsl.KotlinProjectExtension is in unnamed module of loader org.gradle.internal.classloader.VisitableURLClassLoader @3b0ff146)

spierce7

08/31/2021, 3:03 PM

I don’t fully understand why c functions have a free method for every single struct type. Wouldn’t a general purpose

free

method work, or heck, just using the C free method itself.

smallshen

08/31/2021, 8:46 PM

does anyone know why skiko support c++ in the interop https://github.com/JetBrains/skiko/blob/master/skiko/src/nativeInterop/cinterop/skia.def#L2

🤔 2

kenkyee

09/01/2021, 2:39 AM

It didn't sound like it was mobile only...

➕ 2

Lars Toft Jacobsen

09/01/2021, 3:43 PM

Hi there, not sure if this is for mp, ios or this channel, so please bear with me: stuck on a issue where I have added a native IOS target to an existing mp multi-module project. Simply added this to gradle.build:

iosX64("ios") {
    binaries {
        framework()
    }
}

plus sourcesets, and implemented a few expected types. All compilation tasks run successfully but the

linkReleaseFrameworkIos

always fails with a Java assertion error somewhere in the native compiler with zero hints to actual cause. Link debug framework succeeds for iosX64 but will likewise also fail for iosArm64. I deliberately chose one of the stand-alone modules as to not also deal with dependency issues. Any pointer to how I should approach this problem is greatly appreciated 🙏 Searching the docs didn’t yield much in terms of debugging compilations issues. Thanks.

Trevor Stone

09/01/2021, 5:30 PM

With the new official support for xcframeworks the

assembleReleaseXCFramework

task does not contain the dSYMs for the project from what I can tell. I, maybe ignorantly, thought these were important for crash reporting tools. Is there a reason it is only generated for the debug xcframeworks?

Ink

09/02/2021, 9:37 AM

fun findName(personList: PersonList) : String?{
    var name: String? = null
    personList.person.forEach {
        name =  it.name
    }
    return name
}

Can I simplify that code?

Eryk Lepszy

09/02/2021, 4:09 PM

I'm writing an application for Linux and Windows hosts. It has to process files and directories that can often contain various japanese, korean, etc. UTF-8 characters in their names. Everything works fine on Linux, however on Windows they are never processed or displayed correctly, what leads to incorrect and broken paths.

toKString()

function returns correct values on Linux, and broken ones on Windows, I'm assuming because of some Windows or mingw encoding-related caveat that I can't figure out. I created a simple project to demonstrate the issue, does anyone know how to deal with this? https://gitlab.com/Chazoshtare/encoding-issue-kn/-/tree/master

Alexander Black

09/02/2021, 6:28 PM

For some reason, in IntelliJ, my debugger does not stop on breakpoints when running common tests on iOS. Is there a trick to this? I kinda thought it would work out of the box. Any advice or resources would be greatly appreciated.

Paul Woitaschek

09/03/2021, 9:59 AM

Is there an ETA for the new memory model? I don't expect a real date but rather a "not before february 2022" or alike

👍 1

Raed Ghazal

09/03/2021, 1:24 PM

Hey guys I'm checking if mutli global variables are not null before calling a function like that

varX?.let { varX ->
    varY?.let { varY ->
        foo(varX, varY)
    }
}

is there a better way to have this null safe and thread safe but in a cleaner look?

Thomas

09/03/2021, 9:10 PM

After upgrading to Kotlin 1.5.30 I am running into a build failure for watchOS:

clang (LLVM option parsing): for the --fast-isel option: may only occur zero or one times!
clang (LLVM option parsing): for the --global-isel option: may only occur zero or one times!

See full stack trace in thread. Any idea what the issue could be?

spierce7

09/03/2021, 11:31 PM

Does anyone know how to use a

CPointerVar

? I’ve been stuck on this for a few days. I’m interacting with the following c function:

idevice_error_t idevice_get_device_list_extended(idevice_info_t **devices, int *count);

I’m calling it like this:

val connectedDevices: CPointerVar<idevice_info_tVar> = alloc()
val connectedDevicesSize: IntVar = alloc()
idevice_get_device_list_extended(connectedDevices.ptr, connectedDevicesSize.ptr)

I have no idea to get the array of devices out of the

val connectedDevices

. There are no examples using

CPointerVar

and

CValues

that I’ve been able to find to figure this out. Any help would be much appreciated!

Karlo Lozovina

09/05/2021, 6:09 PM

what's the quickest/easiest way to do some IPC with Kotlin/Native on Linux? Both processes in Kotlin, of course...

Raed Ghazal

09/06/2021, 3:10 PM

Hey guys, just sharing a cool extension

inline fun <T> massAction(vararg objects: T, block: T.() -> Unit) {

objects.forEach {

block(it)

}

wmontwe

09/07/2021, 1:19 PM

Hi, who could help with slow compilation targeting iOS? Is Kotlin Native just slow when it reached a certain project size? We increased memory and applied all suggestions from the official https://kotlinlang.org/docs/native-improving-compilation-time.html suggestions. But no luck -> zero improvements. We’re now hitting over 50 minutes compile time and that’s a killer for our project. We see most time spend linking iosArm64 and iosX86. While linking CPU limits to only one core with memory consumption of 8GB and clang with peaks at 9 GB. We’re using Kotlin Native as part of a Kotlin Multiplatform project for 1,5 years now. It wasn’t great before but recently upgraded to Kotlin 1.5, Xcode 12.5.1 and Android Studio Arctic Fox and now it’s just painfully slow.

😮 1

ankushg

09/07/2021, 5:31 PM

Hey friends! We're rapidly increasing the amount of features that expose coroutines/flows to iOS, so our manual wrapping approach (while definitely easier thanks to @russhwolf’s abstractions) isn't exactly sustainable for the long-haul. Curious if anyone has worked with either of these (or any other) options for automating coroutine/flow wrapping for iOS: • Koru or • KMP-NativeCoroutines From the looks of it, Koru requires manual opt-in for each class via an annotation, and generates a new class for iOS that wraps the actual Kotlin implementation. KMP-NativeCoroutines automatically generates wrapped versions of suspend/Flow properties/functions in the same classes. It also provides its own helper pods to map to RxSwift, Combine, and Async/Await. Has anyone used both and have a strong preference for one vs the other? Are there any other substantial differences between the two? Should we just wait until KSP supports multiplatform?

Slackbot

09/07/2021, 5:51 PM

This message was deleted.

Big Chungus

09/07/2021, 6:09 PM

How do I write to file in ios or tvos tests? Is it even possible? Would posix APIs for that still work like on macos target?

napperley

09/07/2021, 8:58 PM

It appears as though the cinterop tool isn't generating the bindings relating to

GtkStatusIcon

( https://stackoverflow.com/questions/41917903/gtk-3-statusicon-replacement ). Apparently

GtkStatusIcon

is accessible in the Gtk 3 API (there should be

GtkStatusIcon

declarations in the gtk/gtk.h header file), but has been removed in the Gtk 4 API. What Kotlin Native options are available for dealing with deprecated APIs in C libraries?

Miroslav Sobotka

09/07/2021, 10:42 PM

Does anyone know how to get rid of these errors? 🤔

The /home/mira/.konan/dependencies/x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2/x86_64-unknown-linux-gnu/bin/ld.gold command returned non-zero exit code: 1.
output:
/usr/lib64/libpipewire-0.3.so: error: undefined reference to 'fcntl64', version 'GLIBC_2.28'
/usr/lib64/libpipewire-0.3.so: error: undefined reference to 'memfd_create', version 'GLIBC_2.27'
/usr/lib64/libpipewire-0.3.so: error: undefined reference to 'stat64', version 'GLIBC_2.33'
/usr/lib64/libpipewire-0.3.so: error: undefined reference to 'getrandom', version 'GLIBC_2.25'
/usr/lib64/libpipewire-0.3.so: error: undefined reference to 'fstat64', version 'GLIBC_2.33'

Kweku

09/08/2021, 1:02 PM

Ny previously running ios app is now running into a build error on the linkPodDebugFrameworkIos/linkDebugFrameworkIos task. It just says Compilation Failed: Assertion Error, with error being MethodbridgeKt.parameterAssociated. StackTrace in comments

napperley

09/08/2021, 11:47 PM

How does Kotlin Native handle C unions via C Interop? GdkEvent ( https://gnome.pages.gitlab.gnome.org/gtk/gdk3/union.Event.html ) is an example of a C Union. Using the

gtk_menu_popup_at_pointer

function ( https://docs.gtk.org/gtk3/method.Menu.popup_at_pointer.html ) as an example how would one pass through a "fake" Union to the function?

spierce7

09/09/2021, 4:23 PM

Is it possible to compile Kotlin x86 binaries on a Mac m1 laptop?

:yes: 3

serebit

09/11/2021, 11:59 PM

Is toCStringArray supposed to segfault when it's run on an empty array?

🇳🇴 2

napperley

09/12/2021, 3:36 AM

There are some weird warnings coming from the linker in relation to modules and target triples:

> Task :linkTodoDebugExecutableLinuxArm32
w: Linking two modules of different target triples: /tmp/native13265186009735942822/cstubs.bc' is 'armv6-unknown-linux-gnueabihf' whereas 'out' is 'armv6kz-unknown-linux-gnueabihf'

w: Linking two modules of different target triples: /tmp/native627338979534854439/cstubs.bc' is 'armv6-unknown-linux-gnueabihf' whereas 'out' is 'armv6kz-unknown-linux-gnueabihf'

w: Linking two modules of different target triples: /tmp/native7458931769986923423/cstubs.bc' is 'armv6-unknown-linux-gnueabihf' whereas 'out' is 'armv6kz-unknown-linux-gnueabihf'

What do the warnings mean? It is important to note that the Linux ARM HFP 32 binary is created successfully. These warnings are confusing since the linuxArm32Hfp target is used, which is based on Linux ARMv7, not Linux ARMv6. The warnings above do not occur if Kotlin 1.5.20 is used instead of Kotlin 1.5.30. Looks like there is a major issue with linking for the linuxArm32Hfp target in Kotlin 1.5.30.

Title

napperley

09/12/2021, 3:36 AM

There are some weird warnings coming from the linker in relation to modules and target triples:

> Task :linkTodoDebugExecutableLinuxArm32
w: Linking two modules of different target triples: /tmp/native13265186009735942822/cstubs.bc' is 'armv6-unknown-linux-gnueabihf' whereas 'out' is 'armv6kz-unknown-linux-gnueabihf'

w: Linking two modules of different target triples: /tmp/native627338979534854439/cstubs.bc' is 'armv6-unknown-linux-gnueabihf' whereas 'out' is 'armv6kz-unknown-linux-gnueabihf'

w: Linking two modules of different target triples: /tmp/native7458931769986923423/cstubs.bc' is 'armv6-unknown-linux-gnueabihf' whereas 'out' is 'armv6kz-unknown-linux-gnueabihf'

Here is a link to the project where the warnings occur: https://gitlab.com/gui-vista/samples/kpad

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