Apple Mach-O Linker Error with upnpx library
问题 I am having a small problem when using the upnpx library. I have downloaded the library and opened the upnpdemo workspace. I created in the same workspace a new project to try to create a simple app with this library. I set the parameters like a demo project, but XCode returns 21 errors: Apple Mach-O Linker Error Undefined symbols for architecture i386: "std::string::find(char const*, unsigned long) const", referenced from: 回答1: In your new project's build settings, set the C++ Language