ASIHttpRequest编译不通过

Undefined symbols for architecture i386:
   "_CFHTTPAuthenticationIsValid", referenced from:
       -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
   "_CFHTTPMessageApplyCredentialDictionary", referenced from:
       -[ASIHTTPRequest applyAuthorizationHeader] in ASIHTTPRequest.o
       -[ASIHTTPRequest applyAuthorizationHeader] in ASIHTTPRequest.o
       -[ASIHTTPRequest applyProxyCredentials:] in ASIHTTPRequest.o
       -[ASIHTTPRequest applyCredentials:] in ASIHTTPRequest.o
   "_CFHTTPMessageIsHeaderComplete", referenced from:
       -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
   "_kCFStreamPropertyHTTPSProxyPort", referenced from:
       _kCFStreamPropertyHTTPSProxyPort$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPSProxyPort$non_lazy_ptr)
   "_inflate", referenced from:
       +[ASIHTTPRequest uncompressZippedData:] in ASIHTTPRequest.o
       +[ASIHTTPRequest uncompressZippedDataFromSource:toDestination:] in ASIHTTPRequest.o
   "_kCFStreamSSLCertificates", referenced from:
       _kCFStreamSSLCertificates$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamSSLCertificates$non_lazy_ptr)
   "_CFNetworkCopyProxiesForAutoConfigurationScript", referenced from:
       +[ASIHTTPRequest proxiesForURL:fromPAC:] in ASIHTTPRequest.o
   "_kCFProxyTypeKey", referenced from:
       _kCFProxyTypeKey$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFProxyTypeKey$non_lazy_ptr)
   "_CFReadStreamCreateForStreamedHTTPRequest", referenced from:
       -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
       -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
   "_kCFProxyPortNumberKey", referenced from:
       _kCFProxyPortNumberKey$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFProxyPortNumberKey$non_lazy_ptr)
   "_kUTTagClassMIMEType", referenced from:
       _kUTTagClassMIMEType$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kUTTagClassMIMEType$non_lazy_ptr)
   "_inflateEnd", referenced from:
       +[ASIHTTPRequest uncompressZippedData:] in ASIHTTPRequest.o
       +[ASIHTTPRequest uncompressZippedDataFromSource:toDestination:] in ASIHTTPRequest.o
       +[ASIHTTPRequest uncompressZippedDataFromSource:toDestination:] in ASIHTTPRequest.o
       +[ASIHTTPRequest uncompressZippedDataFromSource:toDestination:] in ASIHTTPRequest.o
       +[ASIHTTPRequest uncompressZippedDataFromSource:toDestination:] in ASIHTTPRequest.o
   "_inflateInit2_", referenced from:
       +[ASIHTTPRequest uncompressZippedData:] in ASIHTTPRequest.o
       +[ASIHTTPRequest uncompressZippedDataFromSource:toDestination:] in ASIHTTPRequest.o
   "_kCFProxyAutoConfigurationURLKey", referenced from:
       _kCFProxyAutoConfigurationURLKey$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFProxyAutoConfigurationURLKey$non_lazy_ptr)
   "_CFHTTPAuthenticationRequiresUserNameAndPassword", referenced from:
       -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
   "_kCFHTTPAuthenticationUsername", referenced from:
       _kCFHTTPAuthenticationUsername$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPAuthenticationUsername$non_lazy_ptr)
   "_kCFStreamPropertyHTTPProxy", referenced from:
       _kCFStreamPropertyHTTPProxy$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPProxyPort$non_lazy_ptr, _kCFStreamPropertyHTTPProxyHost$non_lazy_ptr , _kCFStreamPropertyHTTPProxy$non_lazy_ptr )
   "_kCFStreamPropertyHTTPResponseHeader", referenced from:
       _kCFStreamPropertyHTTPResponseHeader$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPResponseHeader$non_lazy_ptr)
   "_CFHTTPMessageGetResponseStatusCode", referenced from:
       -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
   "_kCFProxyTypeHTTP", referenced from:
       _kCFProxyTypeHTTP$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFProxyTypeHTTP$non_lazy_ptr)
   "_kCFHTTPAuthenticationSchemeBasic", referenced from:
       _kCFHTTPAuthenticationSchemeBasic$non_lazy_ptr in ASIAuthenticationDialog.o
       _kCFHTTPAuthenticationSchemeBasic$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPAuthenticationSchemeBasic$non_lazy_ptr)
   "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
       -[Reachability startNotifier] in Reachability.o
   "_SCNetworkReachabilityGetFlags", referenced from:
       -[Reachability currentReachabilityStatus] in Reachability.o
       -[Reachability isReachable] in Reachability.o
       -[Reachability isConnectionRequired] in Reachability.o
       -[Reachability isConnectionOnDemand] in Reachability.o
       -[Reachability isInterventionRequired] in Reachability.o
       -[Reachability isReachableViaWWAN] in Reachability.o
       -[Reachability isReachableViaWiFi] in Reachability.o
       -[Reachability reachabilityFlags] in Reachability.o
   "_deflateInit2_", referenced from:
       +[ASIHTTPRequest compressData:] in ASIHTTPRequest.o
       +[ASIHTTPRequest compressDataFromSource:toDestination:] in ASIHTTPRequest.o
   "_CFNetworkCopyProxiesForURL", referenced from:
       -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
       +[ASIHTTPRequest proxiesForURL:fromPAC:] in ASIHTTPRequest.o
   "_CFHTTPMessageSetHeaderFieldValue", referenced from:
       -[ASIHTTPRequest main] in ASIHTTPRequest.o
       -[ASIHTTPRequest checkRequestStatus] in ASIHTTPRequest.o
   "_kCFProxyTypeSOCKS", referenced from:
       _kCFProxyTypeSOCKS$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFProxyTypeSOCKS$non_lazy_ptr)
   "_kCFStreamPropertyHTTPAttemptPersistentConnection", referenced from:
       _kCFStreamPropertyHTTPAttemptPersistentConnection$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPAttemptPersistentConnection$non_lazy_ptr)
   "_CFHTTPMessageCopyVersion", referenced from:
       -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
   "_CFHTTPAuthenticationCopyRealm", referenced from:
       -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
   "_CFHTTPMessageCopyAllHeaderFields", referenced from:
       -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
   "_CFHTTPMessageCreateRequest", referenced from:
       -[ASIHTTPRequest main] in ASIHTTPRequest.o
   "_kCFProxyHostNameKey", referenced from:
       _kCFProxyHostNameKey$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFProxyHostNameKey$non_lazy_ptr)
   "_kCFStreamPropertyHTTPProxyHost", referenced from:
       _kCFStreamPropertyHTTPProxyHost$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPProxyHost$non_lazy_ptr)
   "_CFHTTPMessageCopyResponseStatusLine", referenced from:
       -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
   "_kCFStreamPropertyHTTPRequestBytesWrittenCount", referenced from:
       _kCFStreamPropertyHTTPRequestBytesWrittenCount$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPRequestBytesWrittenCount$non_lazy_ptr)
   "_deflate", referenced from:
       +[ASIHTTPRequest compressData:] in ASIHTTPRequest.o
       +[ASIHTTPRequest compressDataFromSource:toDestination:] in ASIHTTPRequest.o
   "_SCNetworkReachabilityCreateWithAddress", referenced from:
       +[Reachability reachabilityWithAddress:] in Reachability.o
   "_kCFErrorDomainCFNetwork", referenced from:
       _kCFErrorDomainCFNetwork$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFErrorDomainCFNetwork$non_lazy_ptr)
   "_kCFStreamSSLValidatesCertificateChain", referenced from:
       _kCFStreamSSLValidatesCertificateChain$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamSSLValidatesCertificateChain$non_lazy_ptr)
   "_CFHTTPAuthenticationCreateFromResponse", referenced from:
       -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
   "_deflateEnd", referenced from:
       +[ASIHTTPRequest compressData:] in ASIHTTPRequest.o
       +[ASIHTTPRequest compressDataFromSource:toDestination:] in ASIHTTPRequest.o
       +[ASIHTTPRequest compressDataFromSource:toDestination:] in ASIHTTPRequest.o
       +[ASIHTTPRequest compressDataFromSource:toDestination:] in ASIHTTPRequest.o
   "_UTTypeCopyPreferredTagWithClass", referenced from:
       +[ASIHTTPRequest mimeTypeForFileAtPath:] in ASIHTTPRequest.o
   "_kCFStreamPropertyHTTPSProxyHost", referenced from:
       _kCFStreamPropertyHTTPSProxyHost$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPSProxyHost$non_lazy_ptr)
   "_kCFHTTPAuthenticationSchemeNTLM", referenced from:
       _kCFHTTPAuthenticationSchemeNTLM$non_lazy_ptr in ASIAuthenticationDialog.o
       _kCFHTTPAuthenticationSchemeNTLM$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPAuthenticationSchemeNTLM$non_lazy_ptr)
   "_CFHTTPAuthenticationCopyMethod", referenced from:
       -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
   "_kCFHTTPAuthenticationAccountDomain", referenced from:
       _kCFHTTPAuthenticationAccountDomain$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPAuthenticationAccountDomain$non_lazy_ptr)
   "_UTTypeCreatePreferredIdentifierForTag", referenced from:
       +[ASIHTTPRequest mimeTypeForFileAtPath:] in ASIHTTPRequest.o
   "_CFNetworkCopySystemProxySettings", referenced from:
       -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
   "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
       -[Reachability stopNotifier] in Reachability.o
   "_kCFStreamPropertyHTTPProxyPort", referenced from:
       _kCFStreamPropertyHTTPProxyPort$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertyHTTPProxyPort$non_lazy_ptr)
   "_CFHTTPAuthenticationRequiresAccountDomain", referenced from:
       -[ASIHTTPRequest findProxyCredentials] in ASIHTTPRequest.o
       -[ASIHTTPRequest findCredentials] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
       -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
   "_SCNetworkReachabilityCreateWithName", referenced from:
       +[Reachability reachabilityWithHostName:] in Reachability.o
   "_SCNetworkReachabilitySetCallback", referenced from:
       -[Reachability startNotifier] in Reachability.o
   "_kCFHTTPAuthenticationPassword", referenced from:
       _kCFHTTPAuthenticationPassword$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPAuthenticationPassword$non_lazy_ptr)
   "_kCFHTTPVersion1_0", referenced from:
       _kCFHTTPVersion1_0$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPVersion1_0$non_lazy_ptr)
   "_kCFHTTPVersion1_1", referenced from:
       _kCFHTTPVersion1_1$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFHTTPVersion1_1$non_lazy_ptr)
   "_kCFStreamPropertySSLSettings", referenced from:
       _kCFStreamPropertySSLSettings$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamPropertySSLSettings$non_lazy_ptr)
   "_kCFStreamErrorDomainHTTP", referenced from:
       _kCFStreamErrorDomainHTTP$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kCFStreamErrorDomainHTTP$non_lazy_ptr)
   "_CFReadStreamCreateForHTTPRequest", referenced from:
       -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
   "_kUTTagClassFilenameExtension", referenced from:
       _kUTTagClassFilenameExtension$non_lazy_ptr in ASIHTTPRequest.o
      (maybe you meant: _kUTTagClassFilenameExtension$non_lazy_ptr)
 ld: symbol(s) not found
 collect2: ld returned 1 exit status

 新版的ASIHttpRequest代码结构修改很多，不再像之前那样分为ASIHTTPRequest和ASIHTTPRequestDemo两个文件夹。

只选取需要的代码加入到项目中后，发现编译后出现了很多错误。

原因是编译的时候需要加上一些类库

requires CFNetwork, SystemConfiguration, MobileCoreServices, and libz.

Edit: It also needs libxml2