Xcode 12 beta issue

[shtnkgm]

In the latest Xcode12beta, the following error occurs on the Carthage build and this The library could not be built, Carthage's error log is below.

Build Failed
	Task failed with exit code 65:
	/usr/bin/xcrun xcodebuild -project /Users/shtnkgm/Desktop/aaaaa/bbbbb/Carthage/Checkouts/Cuckoo/Cuckoo.xcodeproj -scheme Cuckoo-iOS -configuration Release -derivedDataPath /Users/shtnkgm/Library/Caches/org.carthage.CarthageKit/DerivedData/12.0_12A6163b/Cuckoo/1.4.1 -sdk iphoneos ONLY_ACTIVE_ARCH=NO CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES archive -archivePath /var/folders/62/nrp34pc96t550_hhml86hmwrr_q2rc/T/Cuckoo SKIP_INSTALL=YES GCC_INSTRUMENT_PROGRAM_FLOW_ARCS=NO CLANG_ENABLE_CODE_COVERAGE=NO STRIP_INSTALLED_PRODUCT=NO (launched in /Users/shtnkgm/Desktop/aaaaa/bbbbb/Carthage/Checkouts/Cuckoo)

This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/62/nrp34pc96t550_hhml86hmwrr_q2rc/T/carthage-xcodebuild.2lRxtD.log
make: *** [make] Error 1

The error log for the xcodebuild command is as follows

Undefined symbols for architecture armv7:
  "type metadata for Swift._StringObject.Variant", referenced from:
      outlined init with take of Swift._StringObject.Variant in MockManager.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

=== environment

macOS 10.15.5 Xcode Version: 12 beta 2 Cuckoo Version: 1.4.1 Carthage: 0.34.0

[shtnkgm]

related issue

Undefined symbol: type metadata for Swift._StringObject.Variant https://developer.apple.com/forums/thread/649918

[MatyasKriz]

Hey, @shtnkgm. Thanks for bringing this issue to our attention. We haven't been trying to compile Cuckoo in any of the Xcode 12 beta versions, so it might not be compilable.

We will monitor this and step in if the issue stays with us until GM. For the moment, I don't feel the need to fix what Xcode broke, please use Xcode 11 for now if possible.

If not however, a PR that would fix the Xcode breakage would get merged into a secluded fix/Xcode12-beta branch which would then get updated with the latest Cuckoo features and fixes until Xcode 12 GM comes out.

[intere]

I'm seeing the same issue trying to build dependencies through Carthage with Xcode 12 beta 2 and beta 3.