从版本3.2更新swift到4.0版后，Carthage构建失败。以下是使用carthage update --platform iOS的结果。
*** Fetching AlamofireImage
*** Fetching FSCalendar
*** Fetching Alamofire
*** Fetching ActiveLabel.swift
*** Fetching Toaster
*** Fetching PopupDialog
*** Fetching DKImagePickerController
*** Checking out DKImagePickerController at "3.6.1"
*** Checking out PopupDialog at "0.5.4"
*** Checking out Toaster at "2.1.0"
*** Checking out ActiveLabel.swift at "0.8.0"
*** Checking out Alamofire at "4.5.1"
*** Checking out FSCalendar at "2.7.9"
*** Checking out AlamofireImage at "3.3.0"
*** xcodebuild output can be found in /var/folders/6z/c0myz1fn4rsgy842p9vqqr700000gn/T/carthage-xcodebuild.my2Am1.log
*** Building scheme "ActiveLabel" in ActiveLabel.xcodeproj
Build Failed
Task failed with exit code 65:
/usr/bin/xcrun xcodebuild -project /Users/poqw/Documents/GitHub/nyg-ios/Carthage/Checkouts/ActiveLabel.swift/ActiveLabel.xcodeproj -scheme ActiveLabel -configuration Release -derivedDataPath /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0 -sdk iphoneos ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES build (launched in /Users/poqw/Documents/GitHub/nyg-ios/Carthage/Checkouts/ActiveLabel.swift)
This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/6z/c0myz1fn4rsgy842p9vqqr700000gn/T/carthage-xcodebuild.my2Am1.log
然后$ tail /var/folders/6z/c0myz1fn4rsgy842p9vqqr700000gn/T/carthage-xcodebuild.my2Am1.log
我懂了 ：
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:~/.local/bin:/usr/local/bin:/Users/poqw/miniconda3/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/Wireshark.app/Contents/MacOS:/opt/local/bin"
/usr/bin/ditto -rsrc /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0/Build/Intermediates.noindex/ActiveLabel.build/Release-iphoneos/ActiveLabel.build/Objects-normal/armv7/ActiveLabel.swiftdoc /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0/Build/Products/Release-iphoneos/ActiveLabel.framework/Modules/ActiveLabel.swiftmodule/arm.swiftdoc
** BUILD FAILED **
The following build commands failed:
CompileC /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0/Build/Intermediates.noindex/ActiveLabel.build/Release-iphoneos/ActiveLabel.build/Objects-normal/armv7/ActiveLabel_vers.o /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0/Build/Intermediates.noindex/ActiveLabel.build/Release-iphoneos/ActiveLabel.build/DerivedSources/ActiveLabel_vers.c normal armv7 c com.apple.compilers.llvm.clang.1_0.compiler
CompileC /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0/Build/Intermediates.noindex/ActiveLabel.build/Release-iphoneos/ActiveLabel.build/Objects-normal/arm64/ActiveLabel_vers.o /Users/poqw/Library/Caches/org.carthage.CarthageKit/DerivedData/9.0_9A235/ActiveLabel.swift/0.8.0/Build/Intermediates.noindex/ActiveLabel.build/Release-iphoneos/ActiveLabel.build/DerivedSources/ActiveLabel_vers.c normal arm64 c com.apple.compilers.llvm.clang.1_0.compiler
(2 failures)
以下是我为解决这个问题所做的工作。
xcode-select --switch /Applications/Xcode8.app/Contents/Developer并使用xcrun命令确保版本已更改为swift 3.0然后更新Carthage。如果有人能帮助我，我将不胜感激。
我正在使用Xcode 8.3.1，这就是我所遵循的：
Deleted derived data.
Removed Carthage folder: rm -r ./Carthage
Updated Cartfile with:
github "facebook/facebook-sdk-swift" "master"
github "facebook/facebook-ios-sdk" "sdk-version-4.21.0"
运行Carthage命令：
carthage update --platform iOS --no-use-binaries
Mac Senour的解决方案对我不起作用;什么工作是在这里清理CarthageKit的派生数据：/Library/Caches/org.carthage.CarthageKit/DerivedData/