【发布时间】：2011-03-26 05:26:56
【问题描述】：
当我将 XMPP 集成到我的应用程序中时，我遇到了一个错误。请帮我解决这个问题：
Build CheckOut of project CheckOut with configuration Debug
Ld build/Debug-iphonesimulator/CheckOut.app/CheckOut normal i386
cd "/Users/stellentmac1/Desktop/CheckOut 2"
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk "-L/Users/stellentmac1/Desktop/CheckOut 2/build/Debug-iphonesimulator" "-L/Users/stellentmac1/Desktop/CheckOut 2/../../../../../xmppframework/Vendor/libidn" "-L/Users/stellentmac1/Desktop/CheckOut 2" "-F/Users/stellentmac1/Desktop/CheckOut 2/build/Debug-iphonesimulator" -filelist "/Users/stellentmac1/Desktop/CheckOut 2/build/CheckOut.build/Debug-iphonesimulator/CheckOut.build/Objects-normal/i386/CheckOut.LinkFileList" -mmacosx-version-min=10.6 -lxml2 -Xlinker -objc_abi_version -Xlinker 2 -framework Foundation -framework UIKit -framework CoreGraphics -framework CFNetwork -framework MobileCoreServices -framework SystemConfiguration -lz.1.2.3 -lresolv -o "/Users/stellentmac1/Desktop/CheckOut 2/build/Debug-iphonesimulator/CheckOut.app/CheckOut"
ld: warning: directory '/Users/stellentmac1/Desktop/CheckOut 2/../../../../../xmppframework/Vendor/libidn' following -L not found
ld: duplicate symbol _kRFSRVResolverErrorDomain in /Users/stellentmac1/Desktop/CheckOut 2/build/CheckOut.build/Debug-iphonesimulator/CheckOut.build/Objects-normal/i386/RFSRVResolver-1A90E36B7A8C9E67.o and /Users/stellentmac1/Desktop/CheckOut 2/build/CheckOut.build/Debug-iphonesimulator/CheckOut.build/Objects-normal/i386/RFSRVResolver-7299ADCEDF231192.o
collect2: ld returned 1 exit status
Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1
【问题讨论】：