Hello, I am trying to use the <CocoaMQTT> Pod in the iOS Part of my App . I have created a minimal s...

# ios

[Alexander von Below]

Hello, I am trying to use the CocoaMQTT Pod in the iOS Part of my App . I have created a minimal sample that exhibits the issue here: https://github.com/below/PodSample

When you try to build the app for iOS, there is an error:

> Task :shared:cinteropCocoaMQTTIosSimulatorArm64
Exception in thread "main" java.lang.Error: /Users/below/dev/kmp/PodSample/shared/build/cocoapods/synthetic/IOS/build/Release-iphonesimulator/CocoaMQTT/CocoaMQTT.framework/Headers/CocoaMQTT-Swift.h:560:58: error: cannot find protocol declaration for 'MGCDAsyncSocketDelegate'

Any idea what could be wrong? Thank you!

[Konstantin Tskhovrebov]

does the library have ObjC headers? Kotlin doesn't have Swift interop

[Alexander von Below]

Thank you @Konstantin Tskhovrebov. yes, it does. I have also tried it with a native Objective-C app, just to be sure

[Michal Harakal]

@Konstantin Tskhovrebov for me it looks like an issue with processing of spec.dependencies. Error states that MGCDAsyncSocketDelegate is missing, which is part of MqttCocoaAsyncSocket and this is defined as spec.dependency of the library. If I define MqttCocoaAsyncSocket to be imported explicitly via build.gradle.kts file, for some reason is cinterpro task for MqttCocoaAsyncSocket called always after the main lib CocoaMQTT . So I am also still getting the error …

[Konstantin Tskhovrebov]

@a-dd cc

[a-dd]

@Alexander von Below there are @import directive usages in a generated Obj-C header. It is supported only since 1.8.20-RC and it requires additional cinterop flag for now:

pod("CocoaMQTT") {
    extraOpts = listOf("-compiler-option", "-fmodules")
}

More details in https://youtrack.jetbrains.com/issue/KT-39120/Cinterop-tool-doesnt-support-the-fmodules-compiler-argument

[Michal Harakal]

Thank you very much, @a-dd