Hi there, I’m experiencing a similar issue while t...

# kotlin-native

[Nikolay Kasyanov]

Hi there, I’m experiencing a similar issue while trying to link a test binary for iOS simulator: https://kotlinlang.slack.com/archives/C3SGXARS6/p1559551834011200

I followed the suggestion in thread and did this:

iosX64('iosX64').binaries.getByName('debugTest').linkerOpts('-framework Foundation')

but ld doesn’t seem to like this option:

The difference is that the class is from Foundation (NSURLSessionTaskTransactionMetrics) and is only available in iOS 10+. At the moment this class is only used in actual code but not in tests.

Btw, is there a way to see full ld invocations?

[Nikolay Kasyanov]

@svyatoslav.scherbina I’d appreciate your input if possible.

[Nikolay Kasyanov]

also looking at default conents of konan.properties, -framework Foundation is already here in linkerKonanFlags.ios_x64.

[Nikolay Kasyanov]

setting osVersionMin.ios_x64 = 10.0 doesn’t help either

[Nikolay Kasyanov]

although setting it to 13.0 helps, why tho

[Nikolay Kasyanov]

hmmm I see, some properties were added to this class in iOS 13

[Nikolay Kasyanov]

At the same time, an iOS framework I build of the same Gradle module links just fine.

[Nikolay Kasyanov]

seems like there must be a magic linker option to make tests link, too

[svyatoslav.scherbina]

This should help:

binary.linkerOpts("-ios_simulator_version_min", "13.0.0")

[Nikolay Kasyanov]

@svyatoslav.scherbina thank you! Do I get this right that if a part of an Obj-C class is only available at a higher iOS [or whatever OS it is] version than the rest of the class, it’s currently only possible to use it with this higher version onwards?

[Nikolay Kasyanov]

*from Kotlin, that is

[svyatoslav.scherbina]

I’m not sure, needs investigation.

[Nikolay Kasyanov]

Got it, let me file a ticket to keep track of it.

[Nikolay Kasyanov]

@svyatoslav.scherbina so while trying to create an isolated reproducer, I just couldn’t. This doesn’t happen in a new project.

[Nikolay Kasyanov]

it seems to be okay even with the default deployment target of 9

[Nikolay Kasyanov]

I believe seeing raw ld invocations could help 🤔

[svyatoslav.scherbina]

so while trying to create an isolated reproducer, I just couldn’t. This doesn’t happen in a new project.

I guess I have one:

~/.konan/kotlin-native-prebuilt-macos-1.4.32/bin/kotlinc-native -target ios_x64 test.kt -linker-option -ios_simulator_version_min -linker-option 10.0.0

where test.kt is

fun main() {
    println(platform.Foundation.NSURLSessionTaskTransactionMetrics)
}

[Nikolay Kasyanov]

@svyatoslav.scherbina thank you, here goes the ticket: https://youtrack.jetbrains.com/issue/KT-46282

[svyatoslav.scherbina]

Thanks!