I have c++ enabled in my project and they build fine in Xcode 16.2. But now iOS SDK c++ files do not compile since “std::char_traits” support has been dropped from compiler during 16.3 update. This is the error I get: /Developer/SDKs/iPhoneOS18.4.sdk/usr/include/c++/v1/ios:543:64 Implicit instantiation of undefined template 'std::char_traits' At least these are broken, maybe more: ios.h basic_ostream.h string.h string_view.h This is rather annoying that Apple's own header files do not compile. Can't fix it by myself. Also other workarounds than downgrading to 16.2 are welcome. Feedback assistant: FB17183862