c++ - VLCKit与iOS项目中的.mm文件冲突

Question

我在我的 iOS 项目中使用 VLCKit (MobileVLCKit.framework)。起初一切都运转良好。然后我添加一些 C++ 代码，因此某些文件是 .mm 文件。当我编译时，它失败了。 Xcode 日志

Undefined symbols for architecture armv7:
  "std::runtime_error::runtime_error(std::string const&)", referenced from:
      libebml::CRTError::CRTError(std::string const&, int) in MobileVLCKit(StdIOCallback.o)
  "std::ostream& std::ostream::_M_insert<void const*>(void const*)", referenced from:
      libebml::IOCallback::writeFully(void const*, unsigned long) in MobileVLCKit(IOCallback.o)
      libebml::IOCallback::readFully(void*, unsigned long) in MobileVLCKit(IOCallback.o)
  "std::runtime_error::runtime_error(std::string const&)", referenced from:
      libebml::IOCallback::writeFully(void const*, unsigned long) in MobileVLCKit(IOCallback.o)
      libebml::IOCallback::readFully(void*, unsigned long) in MobileVLCKit(IOCallback.o)
      "VTT for std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >", referenced from:
...

我不知道为什么以及如何解决这个问题。

Answer 1

我找到了解决方案:在“build设置”中将 C++ 标准库更改为 libstdc++(GNU c++ 标准库)。