I have printed __cplusplus that is "201402",and my build setting also is c++17.
If this issue cannot be perfectly solved that I have to change my MINDEPLOYMENT_TARGET to iOS 13
Xcode 15 unkown error, only occur iOS 11-12
Version 15.0 (15A240d)
Xcode 14 don‘t have this problem
Ok,This problem has solved in Xcode 15.1 beta(15C5028h). It‘s blamed dyld