Could not build arm64 contains xcframework for iOS simulator by Carthage.

[r-plus]

Carthage built xcframework for realm will not contains arm64 slice for ios simulator, thus I could not build my project for ios simulator on M1 mac.

Goals

carthage bootstrap --platform iOS --use-xcframeworks --no-use-binaries realm-cocoa
command will compile arm64, i386 and x86_64 contains xcframework for ios simulator.

Expected Results

built xcframework contains ios-arm64_i386_x86_64-simulator directory.

Actual Results

contains ios-i386_x86_64-simulator

Steps for others to Reproduce

$ carthage version
0.37.0

$ echo 'github "realm/realm-cocoa"' > Cartfile

$ carthage bootstrap --platform iOS --use-xcframeworks --no-use-binaries realm-cocoa
*** No Cartfile.resolved found, updating dependencies
*** Fetching realm-cocoa
*** Checking out realm-cocoa at "v10.7.0"
*** xcodebuild output can be found in /var/folders/st/df0gjt9x5tl0cv7fw0xg5s9m0000gn/T/carthage-xcodebuild.LjYtzX.log
*** Building scheme "RealmSwift" in Realm.xcworkspace
*** Building scheme "Realm iOS static" in Realm.xcworkspace
*** Building scheme "Realm" in Realm.xcworkspace

$ ls -1 Carthage/Build/Realm.xcframework
Info.plist
ios-arm64_armv7
ios-i386_x86_64-simulator

$ ls -1 Carthage/Build/RealmSwift.xcframework
Info.plist
ios-arm64_armv7
ios-i386_x86_64-simulator

Code Sample

n/a

Version of Realm and Tooling

Realm framework version: v10.7.0

Realm Object Server version: n/a

Xcode version: 12.4

iOS/OSX version: n/a, using mac is M1 mac 11.2.0

Dependency manager + version: Carthage 0.37.0

[pavel-ship-it]

Hi @r-plus,
There is an issue with Carthage and Xcode 12+ - in two words - it can't build arm64 for iOS and M1 (or Simulator in this case) at same time. Please refer to the workaround described in Carthage docs - https://github.com/Carthage/Carthage#building-platform-specific-framework-bundles-default-for-xcode-11-and-below

[r-plus]

@pavel-ship-it That issue is already resolved by xcframeworks. Latest carthage already supported to building xcframeworks.
This issue talk about it.

[pavel-ship-it]

@r-plus, you right. My bad. I'll take a deeper look in to this problem.

[edfanhouse]

Hello,

I found a workaround with commenting arm64 exclusion on "Base.xcconfig" when building with Carthage :

[r-plus]

@edfanhouse nice! that it!

Remaining issue but maybe this is not blocking

• workflow to create pre-build binary for carthage that uploaded to github releases like RxSwift
  AFAIK, carthage archive command is not yet support xcframework.
  NOTE: carthage 0.37 is not yet support download pre-build xcframework.

Users can workaround issue about simulator arm64 slice conflict by this https://github.com/Carthage/Carthage/blob/master/Documentation/Xcode12Workaround.md#workaround-script workaround script, therefore, adding a workaround on the framework side is not suitable now that carthage supports the xcframework.

[pavel-ship-it]

@r-plus , @edfanhouse thanks for help. I'll create a pull request to enable arm64 builds

[r-plus]

for link: #7158

[pavel-ship-it]

Fixed in #7158
Available on master. Will be released in the upcoming version.