Compilation issues with Xcode 12 Beta 4 ?

[npvisual]

Compilation issues with Xcode 12 Beta 4 ?

[npvisual]

Apparently this is a problem with Carthage (see issue Carthage/Carthage#3019) and seem to have been seen in Xcode 12 Beta 3 as well.

[srdanrasic]

@npvisual have you maybe tried running carthage with --no-use-binaries flag?

[npvisual]

@srdanrasic, thanks for your response. Yes, the issue isn't with the existing binaries. The install actually compiles everything from source (because of Differ's Swift version) and I get the same result with --no-use-binaries.

The problem is with /usr/bin/xcrun lipo -create and the architecture flags -- the error message isn't very indicative unfortunately. But if you separately run the command that's output under Task failed with exit code 1:, you'll see this error :

fatal error: /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo: and ... have the same architectures (arm64) and can't be in the same fat output file.

The link I mentioned above, from Carthage, definitely shows this isn't an isolated case or a problem with ReactiveKit.

I'll go ahead and close this issue as there's a workaround included in the issue (though it's not fixed in Carthage).