问题
anyone got the error below when compiling the "iOS Client" from google "Mobile Backend Starter"? Xcode 5.02, iPhone iOS 7.
duplicate symbol _kCloudBackendClientID in:
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/MessagesTableViewController.o
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/Constants.o
duplicate symbol _kCloudBackendClientSecret in:
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/MessagesTableViewController.o
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/Constants.o
duplicate symbol _kCloudBackendChainName in:
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/MessagesTableViewController.o
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/Constants.o
duplicate symbol _kCloudBackendServiceURL in:
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/MessagesTableViewController.o
/Users/paolo/Library/Developer/Xcode/DerivedData/CloudBackendIOSClient-gjhkqbarudkpudeeytxgowaihtym/Build/Intermediates/CloudBackendIOSClient.build/Debug-iphoneos/CloudBackendIOSClient.build/Objects-normal/armv7/Constants.o
ld: 7 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
回答1:
In file MessagesTableViewController.m
Change:
#import "Constants.m"
to:
#import "Constants.h"
来源：https://stackoverflow.com/questions/21690911/mobile-backend-starter-ios-client-app-engine