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我一直在開發使用模擬器，iPad的iOS應用直到最近，當我得到了我的手在iPad與iOS 8重複的符號鏈接錯誤有了火力地堡的CocoaPods
我已經加入了幾個框架中去就好了，該項目一直建立並運行良好的模擬器（它仍然）。
但是，針對該Pods項目中的Firebase（2.5.0）目標，該設備的構建失敗時會出現有關重複符號的錯誤（其中220個！）。我嘗試了所有清理項目的基礎知識，確保Obj-C相關標誌已到位，但沒有任何結果。
我決定看看在工作過程中是否有某種配置被破壞，所以我測試了一個新項目，Firebase作爲唯一的Pod，沒有其他任何工作，但通過'pod install'設置工作區，同樣的錯誤。
所有重複的符號似乎都是關於同一個文件（libFirebaseStatic.a）和非常多的o文件。
這是錯誤的，但我已經砍掉了錯誤的原因很明顯的一個大的中間部分：
duplicate symbol _llvm.cmdline in:
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FPendingPut.o)
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FBase64Utilities.o)
duplicate symbol _llvm.embedded.module in:
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FPendingPut.o)
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FBase64Utilities.o)
duplicate symbol _llvm.cmdline in:
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FPendingPut.o)
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FLevelDBStorageEngine.o)
.
.
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duplicate symbol _llvm.embedded.module in:
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FPendingPut.o)
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FTransformedEnumerator.o)
duplicate symbol _llvm.cmdline in:
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FPendingPut.o)
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FClock.o)
duplicate symbol _llvm.embedded.module in:
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FPendingPut.o)
/Users/RCR/Documents/DEV/IOS/Business/BLBusiness/Pods/Firebase/libFirebaseStatic.a(FClock.o)
ld: 220 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)