Hello i am facing this issue related to Cinterop while syncing gradle in my KMP/CMP project do anyon...

# multiplatform

[Ayush]

Hello
i am facing this issue related to Cinterop while syncing gradle in my KMP/CMP project
do anyone have any solution ?

here are some details -

Macos - 26.1 Beta (Tahoe)
Xcode - 26.0.1
kotlin - "2.2.20-RC2"
Jvm - 17
ComposeMultiplatform - "1.10.0-alpha01"
org.gradle.caching=false
org.gradle.configureondemand=true
kotlin.mpp.enableCInteropCommonization=true

i am using spmforkmp plugin for native swift implementations

Untitled

[François]

Hi, try the stable version of Kotlin 2.2.20.
Also, look above this error if you have another compilation error.

[François]

Usually the error you put in your file is useless

[Ayush]

I changed the kotlin version to 2.2.20
but it does not makes any difference , i am getting same error

project was working when i am using macos 26.0 ( after updating to Macos 26.1 beta ) , it is getting failed

[François]

oh, I don’t test on beta version of iOS/macOS...

[Ayush]

Any idea of this below error , or how can i solve this , i am working on production app at my company , and now i am blocked from last 2 days due to this

> Task :composeApp:commonizeCInterop FAILED
Exception in thread "main" java.lang.IllegalStateException: Unresolved classifier: platform/Metal/MTLLogicalToPhysicalColorAttachmentMap
	at org.jetbrains.kotlin.commonizer.metadata.CirDeserializers.type(CirDeserializers.kt:655)
	at org.jetbrains.kotlin.commonizer.metadata.CirDeserializers.valueParameter(CirDeserializers.kt:180)
	at org.jetbrains.kotlin.commonizer.metadata.CirDeserializers.function(CirDeserializers.kt:161)
	at org.jetbrains.kotlin.commonizer.tree.deserializer.CirTreeFunctionDeserializer.invoke(CirTreeFunctionDeserializer.kt:29)
	at org.jetbrains.kotlin.commonizer.tree.deserializer.CirTreeClassDeserializer.invoke(CirTreeClassDeserializer.kt:55)
	at org.jetbrains.kotlin.commonizer.tree.deserializer.CirTreePackageDeserializer.invoke(CirTreePackageDeserializer.kt:41)

[François]

Oh, I have already seen this one, try to build for only one apple target, comment the others

[François]

If I’m right, That’s something I can’t fix, it seems to be a Kotlin compiler issue not a plugin one.

[François]

The workaround is to go back to xcode 16.4

[Ayush]

yepp
doesn't seems to be plugin issue
issue is with kotlin compiler itself

[François]

I guess, you can create a new issue on the JB tracker

[Ayush]

ok i will try to downgrade Xcode
Thanks for the reply

btw Spm4Kmp plugin is really awesome , using it from last 8 months in my company project .
thanks for this superb plugin @François

[François]

that’s the second time I see this compiler issue with xcode 26

[Ayush]

yepp
i saw one message from official JB team member , they are working on it to support Xcode 26

[François]

I don’t know if there are aware about this issue with cinterop and xocde 26.
I don’t have a reproducer for the issue

[Ayush]

i will try sharing the reproducable app repo tomorrow

[François]

you’re trying beta version, not a good idea with kotlin 😄

[Ayush]

yepp , my mistake
auto updates and install was enabled , and mac got updates by itself
i had disabled it now ,and will be careful in future

[Ayush]

@François
if possible can you please share the versions of plugins and tools which is working on Macos 26 !

spm , xcode , kotlin , swift and cmp !

thanks

[François]

it’s the latest version 1.0.0-Beta05 and Kotlin 2.2.20, I don’t see what else needed

[Ayush]

Thanks 🙏