SKIE adds swift-module-cache with isStatic XCFramework option

[meavydev]

We build our XCFramework KMP library with isStatic set to true, as it is part of a SDK:

val xcf = XCFramework("IlsLibrary")

listOf(
    iosX64(),
    iosArm64(),
    iosSimulatorArm64()
).forEach {
    it.binaries.framework {
        baseName = "IlsLibrary"
        isStatic = true
        embedBitcode(org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode.DISABLE)
        xcf.add(this)
    }
}

This ends up generating warnings in Xcode when the KMP SPM is included:

Setting isStatic to false fixes the warnings, presumably because swift-module-cache is not included in the XCFramework binary file.
We are using SKIE 0.6.2 but it also happens with 0.6.4.
Kotlin Gradle plugin is 1.9.22.

[TadeasKriz]

Hi @meavydev, could you share the project or a reproducer?

[meavydev]

I have cut down the project and the library in the attached .zip.
Change into "ils demo" and then do:
./gradlew :libraries:ils:buildXCFramework
We only actually use the release XCFramework, so if you look at the binary IlsLibrary:
/ils demo/libraries/ils/build/XCFrameworks/release/IlsLibrary.xcframework/ios-arm64/IlsLibrary.framework/IlsLibrary
You can search for "swift-module-cache" and see there are four references in there, which presumably cause the warnings to appear.
I should say I haven't tried using this demo XCFramework, as we actually produce a SPM from it and I don't want to corrupt our repo.
ils demo.zip

[TadeasKriz]

Thanks for the reproducer. Unfortunately I don't see an Xcode project that I could see the warnings in. Could you show the full warnings that Xcode is showing?

[meavydev]

I can't generate an Xcode project to demonstrate as we generate a private SPM which is hosted on Github, so it's not going to be easy to reproduce in Xcode unless you can do this.
Here is the Swift Package definition:
Package.swift.zip
The warnings in the image from the issue when I created it (so first post) are from our SDK which uses the SPM, but I really can't create an Xcode project for this demo, as it is too big to cut down to a demo and without the Github hosted SPM, then it's not an accurate reproduction anyway.
My impression is that it's being caused by SKIE having a cache folder including swift-module-cache which then gets built into the XCFramework when you use "isStatic = true" and hence the warnings with a path to this swift-module-cache.

[FilipDolnik]

Hello! Can you please send us the full warning message from Xcode? It may contain something that will help us fix the issue even without a reproducer.

My impression is that it's being caused by SKIE having a cache folder including swift-module-cache which then gets built into the XCFramework when you use "isStatic = true" and hence the warnings with a path to this swift-module-cache.

The swift-module-cache is not built into the XCFramework, it's only used for building it. It contains Swift caches for modules on which the built framework depends. The whole skie directory contains only temporary files used during the compilation. The XCFramework and its content is usually located in build/bin/...:

[meavydev]

OK here is the section from the build output where the warnings appear:
`
Showing All Messages
GenerateDSYMFile /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework.dSYM /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework/navenioSDK (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/dsymutil /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework/navenioSDK -o /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework.dSYM

warning: /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/IlsLibrary-22FZ41XVM8TOK.pcm: No such file or directory
note: while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/IlsLibrary-22FZ41XVM8TOK.pcm
note: Linking a static library that was built with -gmodules, but the module cache was not found. Redistributable static libraries should never be built with module debugging enabled. The debug experience will be degraded due to incomplete debug information.
warning: /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/ObjectiveC-NOWQ50CYMZB0.pcm: No such file or directory
note: while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/ObjectiveC-NOWQ50CYMZB0.pcm
warning: /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/Foundation-213A4VPDZWIP8.pcm: No such file or directory
note: while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/Foundation-213A4VPDZWIP8.pcm
warning: /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/_SwiftConcurrencyShims-VUGHILSV67V7.pcm: No such file or directory
note: while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/_SwiftConcurrencyShims-VUGHILSV67V7.pcm

/Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/IlsLibrary-22FZ41XVM8TOK.pcm: No such file or directory

while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/IlsLibrary-22FZ41XVM8TOK.pcm

Linking a static library that was built with -gmodules, but the module cache was not found. Redistributable static libraries should never be built with module debugging enabled. The debug experience will be degraded due to incomplete debug information.

/Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/ObjectiveC-NOWQ50CYMZB0.pcm: No such file or directory

while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/ObjectiveC-NOWQ50CYMZB0.pcm

/Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/Foundation-213A4VPDZWIP8.pcm: No such file or directory

while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/Foundation-213A4VPDZWIP8.pcm

/Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/_SwiftConcurrencyShims-VUGHILSV67V7.pcm: No such file or directory

while processing /Users/shawn/android/libraries/ils/build/skie/binaries/releaseFramework/RELEASE/iosArm64/cache/swift-module-cache/36S9UIVCV1XJ3/_SwiftConcurrencyShims-VUGHILSV67V7.pcm

WriteAuxiliaryFile /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/Objects-normal/arm64/navenioSDK.SwiftConstValuesFileList (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
write-file /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/Objects-normal/arm64/navenioSDK.SwiftConstValuesFileList

ExtractAppIntentsMetadata (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/appintentsmetadataprocessor --output /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework --toolchain-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain --module-name navenioSDK --sdk-root /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS17.5.sdk --xcode-version 15F31d --platform-family iOS --deployment-target 16.4 --target-triple arm64-apple-ios16.4 --binary-file /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework/navenioSDK --dependency-file /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/Objects-normal/arm64/navenioSDK_dependency_info.dat --stringsdata-file /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/Objects-normal/arm64/ExtractedAppShortcutsMetadata.stringsdata --source-file-list /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/Objects-normal/arm64/navenioSDK.SwiftFileList --swift-const-vals-list /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/Objects-normal/arm64/navenioSDK.SwiftConstValuesFileList --compile-time-extraction --deployment-aware-processing

note: Metadata extraction skipped. No AppIntents.framework dependency found. (in target 'navenioSDK' from project 'navenioSDK')

Metadata extraction skipped. No AppIntents.framework dependency found.

AppIntentsSSUTraining (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/appintentsnltrainingprocessor --infoplist-path /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework/Info.plist --temp-dir-path /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/navenioSDK.build/Debug-iphoneos/navenioSDK.build/ssu --bundle-id navenio.sdk --product-path /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework --extracted-metadata-path /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework/Metadata.appintents --archive-ssu-assets

2024-06-03 12:26:28.994 appintentsnltrainingprocessor[59607:2852506] Parsing options for appintentsnltrainingprocessor
2024-06-03 12:26:29.000 appintentsnltrainingprocessor[59607:2852506] No AppShortcuts found - Skipping.

GenerateTAPI /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-iphoneos/navenioSDK.framework/navenioSDK.tbd (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/tapi stubify -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS17.5.sdk -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/PackageFrameworks -F/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos -F/Users/shawn/ios/navenioSDK -L/Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework/navenioSDK -o /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-iphoneos/navenioSDK.framework/navenioSDK.tbd

RegisterExecutionPolicyException /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
builtin-RegisterExecutionPolicyException /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework

Touch /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework (in target 'navenioSDK' from project 'navenioSDK')
cd /Users/shawn/ios/navenioSDK
/usr/bin/touch -c /Users/shawn/Library/Developer/Xcode/DerivedData/ils-akywhclrfityrwbvnailqcfzkpkk/Build/Products/Debug-iphoneos/navenioSDK.framework

`

[FilipDolnik]

Fixed in 0.8.2, but you will need to add the following Gradle configuration:

skie {
    build {
        produceDistributableFramework()
    }
}

[meavydev]

Thanks :) That seems to have removed the warnings for our SPM.