我有一个使用Google Toolbox for Mac和 Firebase Messaging 的 iOS 应用程序。运行pod update更新到最新版本的FM后，在Xcode项目上运行Build后出现以下错误：
duplicate symbol _OBJC_IVAR_$_GTMSessionFetcher._taskPriority in:
.../Xcode/DerivedData/.../Build/Intermediates/....build/Debug-iphonesimulator/....build/Objects-normal/x86_64/GTMSessionFetcher.o
.../Xcode/DerivedData/.../Build/Products/Debug-iphonesimulator/GTMSessionFetcher/libGTMSessionFetcher.a(GTMSessionFetcher.o)
duplicate symbol _OBJC_IVAR_$_GTMSessionFetcher._servicePriority in:
.../Xcode/DerivedData/.../Build/Intermediates/....build/Debug-iphonesimulator/....build/Objects-normal/x86_64/GTMSessionFetcher.o
... // many more similar errors
duplicate symbol _OBJC_IVAR_$_GTMSessionFetcherService._retryEnabled in:
.../Xcode/DerivedData/.../Build/Intermediates/....build/Debug-iphonesimulator/....build/Objects-normal/x86_64/GTMSessionFetcherService.o
.../Xcode/DerivedData/.../Build/Products/Debug-iphonesimulator/GTMSessionFetcher/libGTMSessionFetcher.a(GTMSessionFetcherService.o)
ld: 147 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
我尝试了以下方法：
- 禁用位码
- 将No Common Blocks设置为 Yes（尽管已经如此）
任何人都可以建议吗？不幸的是，由于我当前版本中的错误，看起来需要更新 FM 版本，所以解决它的唯一方法是以某种方式修复这些错误。