Undefined symbols for architectu

Undefined symbols for architecture arm64:
  "_xmlDocDumpMemory", referenced from:
      -[GDTPODS_GDataXMLDocument XMLData] in libGDTMobSDK.a(GDataXMLNode.o)
  "_xmlSetNs", referenced from:
      +[GDTPODS_GDataXMLElement fixQualifiedNamesForNode:graftingToTreeNode:] in libGDTMobSDK.a(GDataXMLNode.o)
      +[GDTPODS_GDataXMLElement fixDuplicateNamespacesForNode:graftingToTreeNode:namespaceSubstitutionMap:] in libGDTMobSDK.a(GDataXMLNode.o)
  "_xmlStrsub", referenced from:
      +[GDTPODS_GDataXMLElement fixQualifiedNamesForNode:graftingToTreeNode:] in libGDTMobSDK.a(GDataXMLNode.o)
  "_xmlFreeNs", referenced from:
      +[GDTPODS_GDataXMLElement deleteNamespacePtr:fromXMLNode:] in libGDTMobSDK.a(GDataXMLNode.o)
  "_xmlSearchNs", referenced from:
      -[GDTPODS_GDataXMLElement elementsForName:] in libGDTMobSDK.a(GDataXMLNode.o)
      -[GDTPODS_GDataXMLElement attributeForName:] in libGDTMobSDK.a(GDataXMLNode.o)
      +[GDTPODS_GDataXMLElement fixQualifiedNamesForNode:graftingToTreeNode:] in libGDTMobSDK.a(GDataXMLNode.o)
  "_xmlFreeNsList", referenced from:
      -[GDTPODS_GDataXMLElement setNamespaces:] in libGDTMobSDK.a(GDataXMLNode.o)
  "_xmlStrcmp", referenced from:
      _StringCacheKeyEqualCallBack in libGDTMobSDK.a(GDataXMLNode.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决办法：在Xcode中解决（GDataXMLNode报错）libxml2.tbd找不到路径的问题