Thanks, this helped a lot to move on!
When finally trying to build a test app in Xcode 18.4 I got an error: Implicit instantiation of undefined template 'std::char_traits<unsigned int>'
ChatGPT gives an answer, but I don't know if this is the real case here:
That error —
“Implicit instantiation of undefined template ‘std::char_traits<unsigned int>’” —
means some code is trying to use std::basic_string<unsigned int>, which is not allowed because std::char_traits<unsigned int> is not defined by the standard library (libc++ doesn't support it).
This issue has come up in SFML, especially when trying to build for iOS using libc++, which is more strict than libstdc++.
