在没有 Cocoapods 的情况下手动集成 Firebase 和 Google Sign In SDK 时出现重复符号

Posted 2023-02-23

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【中文标题】在没有 Cocoapods 的情况下手动集成 Firebase 和 Google Sign In SDK 时出现重复符号【英文标题】：Duplicate symbols when integrating Firebase and Google Sign In SDKs manually without Cocoapods 【发布时间】：2017-05-04 05:23:07 【问题描述】：

在我现有的 ios 项目中手动集成 Firebase 和 Google 登录 SDK 时出现重复符号错误。

此处的相关 SO 问题没有帮助，因为它使用 Cocoapods。

Firebase and Google Signin giving duplicate symbols error

我按时间顺序采取的步骤：

将 Analytics、Auth 和 Database 文件夹以及 Firebase.h 文件从下载的 Firebase SDK (3.11.0) 复制到我的项目中并添加到目标中。

将 GoogleService-Info.plist 复制到项目中并添加到目标中。

将 -ObjC 标志添加到其他链接器标志。

将下载的 Google Sign In SDK (4.0.1) 中的必要框架和捆绑包复制到我的项目中并添加到目标中。

链接了必要的框架和库。

以下是相关的项目结构：

Firebase
    Analytics
        FirebaseAnalytics.framework
        FirebaseCore.framework
        FirebaseInstanceId.framework
        GoogleInterchangeUtilities.framework
        GoogleSymbolUtilities.framework
        GoogleToolboxForMac.framework
    Auth
        FirebaseAuth.framework
        GTMSessionFetcher.framework
GoogleSignIn
    GoogleAppUtilities.framework
    GoogleSignIn.bundle
    GoogleSignIn.framework
    GoogleSignInDependencies.framework
    GoogleSymbolUtilities.framework (removed as Firebase Analytics already includes it)

这是错误日志（截断）：

Ld /Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Products/Debug-iphonesimulator/AddressBookGoogleMaps.app/AddressBookGoogleMaps normal x86_64
    cd /Projects/iOS/AddressBookGoogleMaps
    export IPHONEOS_DEPLOYMENT_TARGET=8.0
    export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.2.sdk -L/Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Products/Debug-iphonesimulator -F/Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Products/Debug-iphonesimulator -F/Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics -F/Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth -F/Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Database -F/Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn -filelist /Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Intermediates/AddressBookGoogleMaps.build/Debug-iphonesimulator/AddressBookGoogleMaps.build/Objects-normal/x86_64/AddressBookGoogleMaps.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -mios-simulator-version-min=8.0 -dead_strip -Xlinker -object_path_lto -Xlinker /Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Intermediates/AddressBookGoogleMaps.build/Debug-iphonesimulator/AddressBookGoogleMaps.build/Objects-normal/x86_64/AddressBookGoogleMaps_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -ObjC -Xlinker -sectcreate -Xlinker __TEXT -Xlinker __entitlements -Xlinker /Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Intermediates/AddressBookGoogleMaps.build/Debug-iphonesimulator/AddressBookGoogleMaps.build/AddressBookGoogleMaps.app.xcent -framework GoogleToolboxForMac -framework FirebaseAuth -framework FirebaseAnalytics -framework GoogleSignInDependencies -framework SystemConfiguration -framework GoogleAppUtilities -framework GTMSessionFetcher -framework FirebaseCore -framework GoogleSignIn -framework SafariServices -framework GoogleSymbolUtilities -framework Accelerate -framework GoogleSymbolUtilities -framework GoogleInterchangeUtilities -framework FirebaseDatabase -framework FirebaseInstanceID -Xlinker -dependency_info -Xlinker /Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Intermediates/AddressBookGoogleMaps.build/Debug-iphonesimulator/AddressBookGoogleMaps.build/Objects-normal/x86_64/AddressBookGoogleMaps_dependency_info.dat -o /Users/Ehtesham/Library/Developer/Xcode/DerivedData/AddressBookGoogleMaps-hbtfxxvykazaogbfqnnraeuywtdt/Build/Products/Debug-iphonesimulator/AddressBookGoogleMaps.app/AddressBookGoogleMaps

duplicate symbol _OBJC_CLASS_$_GTMLogStandardFormatter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_METACLASS_$_GTMLogStandardFormatter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_CLASS_$_GTMLogBasicFormatter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_METACLASS_$_GTMLogBasicFormatter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_CLASS_$_GTMLogNoFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_METACLASS_$_GTMLogNoFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_CLASS_$_GTMLogMininumLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_METACLASS_$_GTMLogMininumLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_CLASS_$_GTMLogMaximumLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_METACLASS_$_GTMLogMaximumLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_CLASS_$_GTMLogLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_METACLASS_$_GTMLogLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
duplicate symbol _OBJC_CLASS_$_GTMLogAllowedLevelFilter in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Analytics/GoogleToolboxForMac.framework/GoogleToolboxForMac(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMLogger_e66760ac68814bab22c3e6b0850da5e6.o)

........................................
........................................

duplicate symbol _OBJC_IVAR_$_GTMSessionFetcherService._cookieStorageMethod in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionFetcherService_c6b7326897506dd1305d6961fdc1ec8b.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionFetcherService_c6b7326897506dd1305d6961fdc1ec8b.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionFetcherService._retryEnabled in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionFetcherService_c6b7326897506dd1305d6961fdc1ec8b.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionFetcherService_c6b7326897506dd1305d6961fdc1ec8b.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadGranularity in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._shouldInitiateOffsetQuery in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._lastChunkRequest in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._initialBodySent in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._fetcherInFlight in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._currentOffset in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._useBackgroundSessionOnChunkFetchers in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._recentChunkReponseHeaders in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._delegateCompletionHandler in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._chunkFetcher in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_CLASS_$_GTMSessionUploadFetcher in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_METACLASS_$_GTMSessionUploadFetcher in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadDataProvider in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _kGTMSessionFetcherUploadLocationObtainedNotification in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._initialBodyLength in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadFileLength in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._subdataGenerating in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._isSubdataGenerating in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _kGTMSessionUploadFetcherMaximumDemandBufferSize in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._chunkSize in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _kGTMSessionUploadFetcherStandardChunkSize in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._delegateCallbackQueue in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadMIMEType in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadFileHandle in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._recentChunkStatusCode in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._isPaused in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._isRestartedUpload in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadData in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadLocationURL in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionUploadFetcher._uploadFileURL in:
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/GoogleSignIn/GoogleSignInDependencies.framework/GoogleSignInDependencies(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
    /Projects/iOS/AddressBookGoogleMaps/AddressBookGoogleMaps/Sources/Externals/Firebase/Auth/GTMSessionFetcher.framework/GTMSessionFetcher(GTMSessionUploadFetcher_fb894b20da0d1114d3ddd8f56ed741c5.o)
ld: 194 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

【问题讨论】：

【参考方案1】：

这就是我解决它的方法，尽管它远非理想的解决方案。

（此解决方案可应用于由于两个静态库都包含公共类并使用-ObjC 或-all_load 标志而导致“重复符号”错误的任何情况。）

将 GoogleSignInDependencies.framework 内的 GoogleSignInDependencies 文件复制到单独的位置 PATH 中。这个文件是一个胖文件，意味着它有不同架构的代码。

打开终端并转到 PATH。

$ cd PATH

运行以下命令以获取有关 fat 库的信息。

$ lipo -info GoogleSignInDependencies

你会得到以下结果。

Architectures in the fat file: GoogleSignInDependencies are: armv7 i386 x86_64 arm64

如您所见，fat 文件中有 4 种架构。

通过运行以下命令从胖文件中获取瘦文件（仅包含一种架构的代码的文件）。

$ lipo -thin armv7 GoogleSignInDependencies -output armv7.a
$ lipo -thin i386 GoogleSignInDependencies -output i386.a
$ lipo -thin x86_64 GoogleSignInDependencies -output x86_64.a
$ lipo -thin arm64 GoogleSignInDependencies -output arm64.a

您将获得 4 个名为 armv7.a、i386.a、x86_64.a 和 arm64.a 的瘦文件。

删除 GoogleSignInDependencies 文件，我们不再需要它了。

创建 4 个名为 armv7、i386、x86_64 和 arm64 的新文件夹。然后将瘦文件 armv7.a、i386.a、x86_64.a 和 arm64.a 移动到各自的文件夹中。您应该具有如下的文件夹结构。

arm64
    arm64.a
armv7
    armv7.a
i386
    i386.a
x86_64
    x86_64.a

从终端转到 4 个文件夹中的每一个，并使用以下命令从瘦文件中提取目标文件 (*.o)。

$ cd armv7
$ ar -x armv7.a
$ cd ../i386
$ ar -x i386.a
$ cd ../x86_64
$ ar -x x86_64.a
$ cd ../arm64
$ ar -x arm64.a

运行这些命令后，4 个文件夹中的每一个都应包含以下文件。（这可能会在未来的版本中改变。）

__.SYMDEF
GTMGeometryUtils_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMLogger_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMNSDictionary+URLArguments_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMNSString+URLArguments_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMOAuth2Authentication_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMOAuth2SignIn_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMOAuth2ViewControllerTouch_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionFetcher_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionFetcherLogging_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionFetcherService_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionUploadFetcher_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSynchronizationAsserts_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o

从 4 个文件夹中的每个文件夹中删除与 Firebase 库冲突的文件。您需要删除这 6 个文件。（这可能会在未来的版本中改变。）

GTMLogger_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMNSDictionary+URLArguments_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionFetcher_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionFetcherLogging_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionFetcherService_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
GTMSessionUploadFetcher_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o

删除瘦文件 armv7.a、i386.a、x86_64.a 和 arm64.a。

通过运行以下命令将剩余的目标文件组合成精简文件。

$ cd armv7
$ libtool -static *.o -o armv7-new.a
$ cd ../i386
$ libtool -static *.o -o i386-new.a
$ cd ../x86_64
$ libtool -static *.o -o x86_64-new.a
$ cd ../arm64
$ libtool -static *.o -o arm64-new.a

将新创建的瘦文件 armv7-new.a、i386-new.a、x86_64-new.a 和 arm64-new.a 复制到新位置 PATH_NEW。您可以删除 PATH 中的所有其他内容。

通过运行以下命令将新的瘦文件组合成一个新的胖文件。

$ cd PATH_NEW
$ lipo -create armv7-new.a i386-new.a x86_64-new.a arm64-new.a -output GoogleSignInDependencies-new

在您的 Xcode 项目中使用新生成的 GoogleSignInDependencies-new 代替 GoogleSignInDependencies。

我强烈推荐以下文章，以更深入地了解事物。

http://atnan.com/blog/2012/01/12/avoiding-duplicate-symbol-errors-during-linking-by-removing-classes-from-static-libraries

【讨论】：

这就是我一直在寻找的解决方案。谷歌自己的框架不能一起使用是一种耻辱！对于 GoogleSignIn 4.0.1 和 Firebase 4.0.2 版本，只需删除 2 个 .o 符号：GTMLogger_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o 和 GTMNSDictionary+URLArguments_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o。谢谢！绝对令人惊叹的解决方案。 @FenixVoltres 建议删除的符号也适用于 GoogleSignIn 4.1.0 和 Firebase 4.4.0！天才！已经坚持了好几个小时！ :D 对我来说，我从您的建议中删除了以下四个 .o 文件，并且成功了！ GTMSessionFetcher(arm64)、GTMSessionUploadFetcher(arm64)、GTMSessionFetcherService(arm64)、GTMSessionFetcherService(arm64)【参考方案2】：

2019-01-17 更新 - 破解 Google 登录现在是多余的！

根据下面 xmasalov 的回复，Firebase 已更新为在 /Invites 目录中包含 Google 登录所需的所有依赖项。只需添加：

GoogleSignIn.framework GTMOAuth2.framework GoogleToolboxForMac.framework

从那个目录到你的项目。您不再需要从 Google 下载 GoogleSignIn 框架。

我原来的回复（请忽略）：

如果您有这个问题，我刚刚编写了一个 bash shell 脚本，它可以为我完成所有工作。我已将其保存为Gist。需要您自担风险使用它。

请阅读以上所有 cmets，因为脚本可能需要调整以匹配新版本框架中的更改。

【讨论】：

你是绝对的男人！这很完美！对于最新的 4_1_0，请确保将第 7 行更改为 duplicateClasses=(GTMLogger GTMNSDictionary+URLArguments) 像魅力一样工作！我只需要注释掉脚本中将框架移开并将创建的框架移动到位的最后几行。我不知道为什么，但是使用 org 脚本我只是找不到创建的框架。现在我只是手动从“hack”文件夹中复制它。很棒的剧本！官方的 Google Sign in SDK 现已移除对 GTM OAuth 2 库的依赖，因此如果您下载 Google Sign In 框架，则不需要 GTMOAuth2.framework。见developers.google.com/identity/sign-in/ios/release。【参考方案3】：

更新答案

截至 2018-12，Google Sign-In for iOS 团队移除了对 GTM OAuth 2 库的依赖。

Google Sign-In iOS SDK Release Notes

2018-11-29 -- v4.4.0 删除了对 GTM OAuth 2 库的依赖。

原答案

从 2018-11 开始，您可以找到 GoogleSignIn 与 FirebaseAnalytics 和 FirebaseAuth 合作所需的一切strong> 在Firebase/Invites 文件夹中：

GoogleSignIn.framework GTMOAuth2.framework

无需添加GoogleSignInDependencies.framework，就像一个魅力。

【讨论】：

救命稻草！并且您可能需要添加 GoogleSignin.bundle 以复制捆绑资源如果我没看错，现在可以避免不得不破解框架。现在很方便已确认。详情请看我上面的回复。【参考方案4】：

这就是它发生的原因（截至 2018 年 4 月 20 日为真）：

Firebase 依赖于 GTMSessionFetcher 库 GoogleSign in 依赖于 GTMSessionFetcher 库和 GTMOAuth2 库

当使用 CocoaPods 时，一切都很好地解决了，因为 CocoaPods 是一个智能依赖管理器，它对常见的依赖项进行重复数据删除。

下载预编译二进制文件时，事情有点棘手......

Firebase zip 文件将每个依赖项都作为单独的 .framework 提供。这意味着如果一个框架已经从其他地方被拾取，你可以手动删除重复的

GoogleSignIn zip 文件采用了另一种方法，并将所有依赖项捆绑到 GoogleSignInDependencies.framework 中，这意味着它包含两个 GTMSessionFetcher 和 GTMOAuth2 框架

如果尝试按原样链接，捆绑到 GoogleSignInDependencies 中的 GTMSessionFetcher 框架将与 Firebase 随附的独立 GTMSessionFetcher.framework 发生冲突

如果删除了 GoogleSignInDependencies 框架，链接器将找不到 GTMOAuth2 框架并失败

理想情况下，GoogleSignIn zip 文件应包含各个依赖项，以便更清楚地了解正在发生的事情。就目前而言，这个问题有两种解决方案：

简单：从 Firebase 附带的框架中删除 GoogleSignInDependencies 中捆绑的任何内容

在 Frameworks/Firebase/Storage 下，删除 GTMSessionFetcher.framework 在 Frameworks/Firebase/Analytics 下，删除 GoogleToolboxForMac.framework

更难：摆脱 GoogleSignInDependencies

从项目中删除 GoogleSignInDependencies.framework 获取 GTMOAuth2.framework - 我不相信它是以二进制形式分发的，因此最简单的方法是使用 CocoaPods 构建一个包含它的项目并从 DerivedData 获取生成的框架

【讨论】：

你必须走最艰难的路，GoogleSignInDependencies 对于 Firebase 5 来说太旧了。但是你可以在 Firebase SDK 的 Invites 文件夹中找到 GTMOAuth2【参考方案5】：

只需从Link Binaries 中删除GoogleSignInDependencies.framework

【讨论】：

【参考方案6】：

真正的问题是；你为什么直接复制而不是使用cocoapods？使用您的方法确实没有任何优势。如果你使用 cocoapods 你不会有这个问题。如果我是你，我会删除这些文件并使用 cocoapods 安装。安装 cocoapods 时出错的空间要小得多

【讨论】：

我在使用 cocoapods 时遇到了同样的问题当我使用 cocoapods 时出现错误提示 Native Modules must not be null

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