iOS中连接混编C＋＋库的编译问题

问题

重新封装画板内核库后，所有的混编文件（.mm）都被打包到了库中，外面应用层代码全部都是OC文件（.m）。这时候编译工程会出现如下连接错误：

Undefined symbols for architecture arm64: "vtable for __cxxabiv1::__vmi_class_type_info", referenced from: ... NOTE: a missing vtable usually means the first non-inline virtual member function has no definition. "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::assign(char const*)", referenced from: ... "___cxa_pure_virtual", referenced from: ... "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::operator=(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from: ... "std::__1::__vector_base_common<true>::__throw_out_of_range() const", referenced from: ... "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from: ... "std::terminate()", referenced from: ... "___cxa_guard_release", referenced from: ... "___cxa_guard_abort", referenced from: ... "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(char const*, unsigned long)", referenced from: ... "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::reserve(unsigned long)", referenced from: ... "___gxx_personality_v0", referenced from: ... ... ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

探索

通过网上搜索到如下解决方案

将Build Settings->Apple LLVM7.1-Language中的Compile Sources As修改为According To File Tyle
将Build Settings->Apple LLVM7.1-Language中的Compile Sources As修改为Objective-C++

以上第二个方法对我不适用，修改为全部按**Objective-C++方式编译源文件会出问题。第一个解决方案的话也有问题，由于项目中没有了混编文件（.mm），那么Xcode根本不会调用Objective-C++**编译器，所以连接问题还是存在。