Bringing iOS Frameworks through Carthage in Xcode 12.0

Question

I am using Xcode 12.0 and Carthage 0.35.0 and when I do Carthage bootstrap --platform iOS or Carthage update --platform iOS --no-use-binaries on a framework that I have developed I get this error. I did not have this problem in Xcode 11.7.

*** Building scheme "MyFrameworkKit" in MyFrameworkKit.xcodeproj
Build Failed
    Task failed with exit code 1:
    /usr/bin/xcrun lipo -create /Users/myname/Library/Caches/org.carthage.CarthageKit/DerivedData/12.0_12A7209/MyFrameworkKit/579b0a4ac155ab413da1d73609bf5f24e5ed7cc8/Build/Intermediates.noindex/ArchiveIntermediates/MyFrameworkKit/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/MyFrameworkKit.framework/MyFrameworkKit /Users/myname/Library/Caches/org.carthage.CarthageKit/DerivedData/12.0_12A7209/MyFrameworkKit/579b0a4ac155ab413da1d73609bf5f24e5ed7cc8/Build/Products/Release-iphonesimulator/MyFrameworkKit.framework/MyFrameworkKit -output /Users/myname/Developer/myapp/ios/Carthage/Build/iOS/MyFrameworkKit.framework/MyFrameworkKit

This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/11/tjwvq_yx4mj042kv46mxz1wh0000gn/T/carthage-xcodebuild.gaIzr4.log

When I look at the log file mentioned above. I see that the build the was successful. But when I open Xcode and try to build the app I see the message: /Users/myname/Developer/myapp/ios/myapp.xcodeproj Building for iOS Simulator, but the linked framework 'MyFrameworkKit.framework' was built for iOS.

Something must have changed in what type of framework build I can bring into my app from Xcode 11.7 to Xcode 12.0. Do you know what it is that I am missing?

Update:

I have been using the workaround suggested in the accepted answer below successfully. Seems like there is a new Carthage release that I yet I have to try. But it does say that it fixes this issue: https://github.com/Carthage/Carthage/releases/tag/0.36.1

Answer 1

I used the suggestion here: https://newreleases.io/project/github/Carthage/Carthage/release/0.37.0

Basically: To build XCFrameworks into your app, run Carthage with --use-xcframeworks and drag the produced XCFrameworks into your Xcode target’s Embedded binaries section...

This is the command I used: carthage bootstrap --platform iOS --use-xcframeworks

Answer 2

Now Carthage 0.37 finally is capabable of building XCFrameworks 🎉 This makes it compatible with Xcode 12 and the workaround can be deleted. Just perform the following steps:

# Delete carthage cache
rm -rf ~/Library/Caches/org.carthage.CarthageKit
# Delete carthage build folder
rm -rf Carthage/Build
# Delete DerivedData folder
rm -rf ~/Library/Developer/Xcode/DerivedData
# Build all dependencies as XCFrameworks
carthage bootstrap --use-ssh --use-xcframeworks --cache-builds

See the Github release 0.37.0 for detailled information and a migration guide from frameworks to XCFrameworks. The guide tells you how to integrate the xcframeworks and what you have to remove from your project.