Symbol(s) not found for architecture ARM64 clang--error: linker command failed with exit code 1 (use -v to see invocation)答案

【问题标题】：Symbol(s) not found for architecture ARM64 clang--error: linker command failed with exit code 1 (use -v to see invocation)Symbol(s) not found for architecture ARM64 clang--error: linker command failed with exit code 1 (use -v to see invocation)
【发布时间】：2019-07-20 07:02:21
【问题描述】：

我在尝试构建时收到此错误。我已经更新了我的 pod，但没有解决。

   "Undefined symbols for architecture arm64:
  "_xmlXPathFreeObject", referenced from:
      lxml::xpath::object::object(_xmlXPathObject*) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlReadMemory", referenced from:
      lxml::xml::xml(void const*, unsigned long, char const*, char const*, int) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "___xmlLastError", referenced from:
      lxml::xml::xml(void const*, unsigned long, char const*, char const*, int) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathCastToBoolean", referenced from:
      lxml::xpath::object::boolean() in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathCastToString", referenced from:
      lxml::xpath::object::string() in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlFreeDoc", referenced from:
      lxml::xml::xml(void const*, unsigned long, char const*, char const*, int) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathFreeContext", referenced from:
      +[FNFMediaPresentationDescription presentationDescriptionWithContentsOfXml:mpdUrl:error:] in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathCompile", referenced from:
      lxml::xpath::expression::expression(char const*) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathCastToNumber", referenced from:
      lxml::xpath::object::integer() in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathNewContext", referenced from:
      lxml::xpath::xpath(lxml::xml const&, std::__1::function<void (_xmlXPathContext*)>) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathCompiledEval", referenced from:
      lxml::xpath::evaluate(lxml::xpath::expression const&) in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlFree", referenced from:
      lxml::xpath::object::string() in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
  "_xmlXPathRegisterNs", referenced from:
      +[FNFMediaPresentationDescription presentationDescriptionWithContentsOfXml:mpdUrl:error:] in FBAudienceNetwork(FNFMediaPresentationDescription.mm.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
"

【问题讨论】：

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标签： ios swift xcode unity3d ld

【解决方案1】：

看错误，好像少了：libxml2。

转到Xcode -> Target-> General -> Linked Frameworks and Libraries，点击加号并添加libxml2。

【讨论】：