Estoy intentando agregar un mapa de Google a mi aplicación de iPhone, sigo lo que Google dice aquíhttps://developers.google.com/maps/documentation/ios/start#getting_the_google_maps_sdk_for_ios

Hice todo lo que dijeron y, sin formato, tengo seis errores al compilar mi aplicación, esos son:

Undefined symbols for architecture i386:
"_objc_setProperty_nonatomic", referenced from:
      -[GMSx_PBGeneratedMessage setExtensionRegistry:] in GoogleMaps(ProtocolBuffers.o)
  "_NSURLIsExcludedFromBackupKey", referenced from:
      _GMSSetSkipBackupAttribute in GoogleMaps(GMSUtils.o)
  "_objc_setProperty_nonatomic_copy", referenced from:
      -[GMSBlockAnimationDelegate setStartBlock:] in GoogleMaps(GMSCoreAnimation.o)
      -[GMSBlockAnimationDelegate setCompletionBlock:] in GoogleMaps(GMSCoreAnimation.o)
      -[GMSGLTileProvider setAllTilesDeadBlock:] in GoogleMaps(GMSGLTileProvider.o)
      -[GMSUserEvent3Logger setOutputFilter:] in GoogleMaps(GMSUserEvent3Logger.o)
      -[GMSPanoramaLink setPanoramaID:] in GoogleMaps(GMSPanoramaLink.o)
      -[GMSIconCache setName:] in GoogleMaps(GMSIconCache.o)
  "_objc_setProperty_atomic", referenced from:
      -[GMSDASHProtobufferRequest setProtobuffer:] in GoogleMaps(GMSDASHConnectionRequest.o)
      -[GMSDASHConnection setServerURL:] in GoogleMaps(GMSDASHConnection.o)
      -[GMSVectorModifierMapTileService setTileFilter:] in GoogleMaps(GMSVectorModifierMapTileService.o)
      -[GMSx_GTMHTTPFetcher setMutableRequest:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setCredential:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setProxyCredential:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setPostData:] in GoogleMaps(GTMHTTPFetcher.o)
      ...
  "_objc_setProperty_atomic_copy", referenced from:
      -[GMSDASHBlocksRequest setAsyncRequestFailedHandler:] in GoogleMaps(GMSDASHConnectionRequest.o)
      -[GMSDASHConnection setExperimentIDs:] in GoogleMaps(GMSDASHConnection.o)
      -[GMSx_GTMHTTPFetcher setServiceHost:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setDownloadPath:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setTemporaryDownloadPath:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setComment:] in GoogleMaps(GTMHTTPFetcher.o)
      -[GMSx_GTMHTTPFetcher setLog:] in GoogleMaps(GTMHTTPFetcher.o)
      ...
  "_OBJC_CLASS_$_UIActivityViewController", referenced from:
      objc-class-ref in GoogleMaps(GMSServices.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

NOTA, mi base sdk es ios 5 y mi objetivo de desarrollo es 5