原文链接：https://blog.csdn.net/eric41050808/article/details/39502231
搞了一下午，终于找到答案了！！再Mac上使用自带的g++编译使用opencv编写的图像代码，在使用图像数据结构时，使用IplImage和CvMat数据类型进行简单的加载、显示图像和两种数据的相互转换都没有错误，但只要使用Mat数据结构就出现下面的错误：
Undefined symbols for architecture x86_64:\
"std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(char const*, unsigned long)", referenced from:\
_main in main.o\
"std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::~basic_string()", referenced from:\
_main in main.o\
"std::terminate()", referenced from:\
___clang_call_terminate in main.o\
"___cxa_begin_catch", referenced from:\
___clang_call_terminate in main.o\
"___gxx_personality_v0", referenced from:\
_main in main.o\
Dwarf Exception Unwind Info (__eh_frame) in main.o\
ld: symbol(s) not found for architecture x86_64\
clang: error: linker command failed with exit code 1 (use -v to see invocation)\
make: *** [main] Error 1\
想了很多办法，终于看到有人提示：编译选项添加-lstdc++，即使用标准C++库，问题解决！