iphone - 部署目标为 7.0 时架构错误的 undefined symbol

Question

我在我的原生 iOS 应用程序(一堆 .a 库)中使用第三方框架。我的应用程序是使用 XCode 5 base SDK 7.0 开发的。

当部署目标为 6.1 时，库可以正常编译和链接(库和 header 搜索路径很好)。但是，当我将部署目标更改为 7.0 时，出现以下链接器错误:

Undefined symbols for architecture i386:
  "std::string::find_last_of(char const*, unsigned long) const", referenced from:
      GetExecutionDir(ECTemplateString<char>&, char*, bool) in myLibrary.a(moPlatForm.o)
  "std::string::find(char const*, unsigned long) const", referenced from:
      ParseLog(std::string const&, unsigned int&, CmoDateTime&, int&, std::string&) in myLibrary.a(AppLog.o)
  "std::string::size() const", referenced from:
      mo::CmoParam::WriteToStream(void*, mo::STREAM_STATE*) in myLibrary.a(moParams.o)
  "std::string::c_str() const", referenced from:
      GetExecutionDir(ECTemplateString<char>&, char*, bool) in myLibrary.a(moPlatForm.o)
      CMocaFileTransfer::UpdateParamsForGetTraceFiles(mo::CmoParamList&, long) in myLibrary.a(RobieFileTransfer.o)
      CMocaFileTransfer::AddTraceFileForUpload(std::string const&, std::string const&) in myLibrary.a(RobieFileTransfer.o)
      CMocaFileTransfer::CreateParamsForSendTraceFiles(mo::CmoObject&) in myLibrary.a(RobieFileTransfer.o)
      mo::CmoParam::WriteToStream(void*, mo::STREAM_STATE*) in myLibrary.a(moParams.o)
      ParseLog(std::string const&, unsigned int&, CmoDateTime&, int&, std::string&) in myLibrary.a(AppLog.o)
      CAppLog::LogExists(unsigned int) in myLibrary.a(AppLog.o)
      ...

库有点旧，我不确定是否存在兼容性问题。我不打算支持 iOS 6，所以我需要将部署目标设置为 7.0。任何形式的帮助/指导都会很棒。

Answer 1

对我来说，将“stdc++.6.0.9.dylib”而不是“stdc++.dylib”包含到依赖项中也解决了链接器错误