Xcode 10b5 - 重复符号链接器错误，无法使用Crashlytics编译

Question

我正在尝试使用Xcode 10 beta 5编译我的项目，其中包括Firebase、Crashlytics/Fabric和其他一些模块。链接期间发生以下错误：

Ld /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/appname.app/appname normal arm64 (in target: appname)
        cd /Users/Username/iPhone-dev/appname
        export IPHONEOS_DEPLOYMENT_TARGET=9.0
        /Users/Username/Downloads/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch arm64 -isysroot /Users/Username/Downloads/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk -L/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/AFNetworking -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/Actions -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/AppAuth -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/Bluepeer -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/Bolts -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/CocoaAsyncSocket -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/CocoaLumberjack -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/Color-Picker-for-iOS -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/DNPWPSPrinter -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/DataCompression -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/EOSFTPServer -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FBSDKCoreKit -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FBSDKLoginKit -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FastttCamera -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FirebaseAuth -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FirebaseCore -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FirebaseDatabase -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/FirebaseStorage -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/GTMAppAuth -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/GTMSessionFetcher -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/Gloss -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/GoldRaccoon -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/GoogleToolboxForMac -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/HHServices -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/JPSVolumeButtonHandler -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/M13BadgeView -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/ObjectiveDropboxOfficial -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/PhoneNumberKit -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/Protobuf -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/TPCircularBuffer -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/leveldb-library -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/nanopb -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/upnpx -F/Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/xaphodObjCUtils -F/Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS -F/Users/Username/iPhone-dev/appname/Pods/Fabric/iOS -F/Users/Username/iPhone-dev/appname/Pods/FirebaseABTesting/Frameworks -F/Users/Username/iPhone-dev/appname/Pods/FirebaseAnalytics/Frameworks -F/Users/Username/iPhone-dev/appname/Pods/FirebaseDynamicLinks/Frameworks -F/Users/Username/iPhone-dev/appname/Pods/FirebaseInstanceID/Frameworks -F/Users/Username/iPhone-dev/appname/Pods/FirebaseRemoteConfig/Frameworks -F/Users/Username/iPhone-dev/appname/Pods/TwitterCore/iOS -F/Users/Username/iPhone-dev/appname/Pods/TwitterKit/iOS -F/Users/Username/iPhone-dev/appname/cascablecore-binaries/Binaries/iOS -filelist /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Intermediates.noindex/appname.build/Debug-iphoneos/appname.build/Objects-normal/arm64/appname.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -Xlinker -rpath -Xlinker @executable_path/Frameworks -miphoneos-version-min=9.0 -dead_strip -Xlinker -object_path_lto -Xlinker /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Intermediates.noindex/appname.build/Debug-iphoneos/appname.build/Objects-normal/arm64/appname_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -fobjc-arc -fobjc-link-runtime -L/Users/Username/Downloads/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphoneos -Xlinker -add_ast_path -Xlinker /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Intermediates.noindex/appname.build/Debug-iphoneos/appname.build/Objects-normal/arm64/appname.swiftmodule -ObjC -lc++ -licucore -lsqlite3 -lz -framework AFNetworking -framework AVFoundation -framework Accounts -framework Actions -framework AppAuth -framework AssetsLibrary -framework Bluepeer -framework Bolts -framework CFNetwork -framework CocoaAsyncSocket -framework CocoaLumberjack -framework Color_Picker_for_iOS -framework CoreData -framework CoreGraphics -framework CoreMedia -framework CoreText -framework Crashlytics -framework DNPWPSPrinter -framework DataCompression -framework EOSFTPServer -framework FBSDKCoreKit -framework FBSDKLoginKit -framework Fabric -framework FastttCamera -framework FirebaseABTesting -framework FirebaseAnalytics -framework FirebaseAuth -framework FirebaseCore -framework FirebaseCoreDiagnostics -framework FirebaseDatabase -framework FirebaseDynamicLinks -framework FirebaseInstanceID -framework FirebaseNanoPB -framework FirebaseRemoteConfig -framework FirebaseStorage -framework Foundation -framework GTMAppAuth -framework GTMSessionFetcher -framework Gloss -framework GoldRaccoon -framework GoogleToolboxForMac -framework HHServices -framework JPSVolumeButtonHandler -framework M13BadgeView -framework MessageUI -framework MobileCoreServices -framework ObjectiveDropboxOfficial -framework PhoneNumberKit -framework Protobuf -framework QuartzCore -framework SafariServices -framework Security -framework Social -framework StoreKit -framework SystemConfiguration -framework TPCircularBuffer -framework TwitterCore -framework TwitterKit -framework UIKit -framework leveldb -framework nanopb -framework upnpx -framework xaphodObjCUtils -weak_framework WebKit -ObjC -lc++ -licucore -lsqlite3 -lz -lctemplate-ios -letpan-ios -lxml2 -lsasl2 -liconv -ltidy -lz -lc++ -lresolv -stdlib=libc++ -ObjC /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/libMailCore-ios.a -framework SafariServices -framework CascableCore -framework Security -framework CFNetwork -framework MessageUI -framework StoreKit -framework GameKit -framework StopKit -framework Pods_appname -Xlinker -dependency_info -Xlinker /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Intermediates.noindex/appname.build/Debug-iphoneos/appname.build/Objects-normal/arm64/appname_dependency_info.dat -o /Users/Username/Library/Developer/Xcode/DerivedData/appname-lastnamepjksdzfewpftlvqzuglaxplu/Build/Products/Debug-iphoneos/appname.app/appname

    duplicate symbol l086 in:
        /Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics(CLSFileManager.o)
        /Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics(CLSInternalReport.o)
    duplicate symbol l087 in:
        /Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics(CLSFileManager.o)
        /Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics(CLSInternalReport.o)
    duplicate symbol l088 in:
        /Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics(CLSSettings.o)
        /Users/Username/iPhone-dev/appname/Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics(CLSInternalReport.o)
....<many more omitted>

如何在Xcode 10中使Google Fabric / Crashlytics正常工作？

编辑：感谢所有发表评论的人。我迄今为止尝试过以下方法：

- 尝试重新安装pods / 清除pod缓存 - 尝试清理构建文件夹，然后重启xcode - 尝试调整 -ObjC 链接器标志。看起来这个标志确实与问题有关，但不幸的是我需要激活这个标志，因为我使用具有类静态类别的objective-c框架

- xaphod

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我与Xcode 10 beta5遇到了同样的问题。在beta4上它没有问题。目前我只能说，在链接器中使用“-ObjC”或“-force_load”标志存在问题。我还可以确认，它仅在构建真实设备时失败，并且在模拟器上没有问题。苹果将需要修复这个问题。 - Mikrohard

我也遇到了同样的问题，但是在Xcode beta 4上也有这个问题。移除-ObjC链接器标志似乎有所帮助，但是应用程序会在+[CLSFileManager defaultCenter]: unrecognized selector sent to class处崩溃。 - Jan

你可以在这里找到所有版本的Xcode（测试版和正式版）：https://xcodereleases.com/ - Lodoss

Crashlytics团队已经意识到这个问题，详见https://twitter.com/crashlytics/status/1024359450436685824。 - Chee-Yi

收到了苹果员工的回复。请在此处查看Eskimo的回复。https://forums.developer.apple.com/thread/106694 - xaphod

Answer 1

我的问题在使用今天发布的Xcode 10b6版本后得到了解决！

- Christoph

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这个答案正在Meta上讨论。 - Script47