Xcode Undefined symbols 错误

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于 2021-08-17 17:21:52 发布

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分类专栏： # macOS

本文链接：https://blog.youkuaiyun.com/luoshabugui/article/details/119761428

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本文讲述了遇到'Undefined symbol'报错，特别是typeinfo和vtable的问题，通过排查发现纯虚接口IConfig缺少定义，修正后解决了编译错误。重点在于理解接口类的实现细节和链接阶段的依赖。

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报错信息

error:
Undefined symbol: typeinfo for sdk::IConfig
Undefined symbol: vtable for sdk::IConfig

具体信息：
Undefined symbols for architecture x86_64:
  "typeinfo for sdk::IConfig", referenced from:
      typeinfo for sdk::ConfigImpl in sdk.a(config_impl.o)
  "vtable for sdk::IConfig", referenced from:
      sdk::IConfig::IConfig() in sdk.a(sdk_impl.o)
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)