With the latest release of Xcode, my obj c++ project is now giving compile errors like this.
No code has changed. Reverting to Xcode 15.2 solves this
Xcode 15.3 - 'std::is_integral<double>' has different definitions in different modules
Did you ever get this resolved?
I'm experiencing the same fatal compile error with iOS 18 RC and Xcode 16 RC:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator18.0.sdk/usr/include/c++/v1/__type_traits/is_integral.h:53:29 'std::is_integral<double>' has different definitions in different modules; definition in module 'std_private_type_traits_is_integral' is here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.0.sdk/usr/include/c++/v1/__type_traits/is_integral.h:53:29 'std::is_integral<double>' has different definitions in different modules; definition in module 'std_private_type_traits_is_integral' is here
I don't know how to resolve this since the issue involves the is_integral.h file which is part of the Foundation include. This appears to be an Xcode 16 bug as my app builds without errors using Xcode 15.4 (on a Mac running Sonoma instead of Sequoia).
Meanwhile, I found a solution to run Xcode 15 on Sequoia.
Update: I was finally able to fix this issue by changing the project's Build Settings > Apple Clang Language C++ > C++ Language Dialect to "GNU++23" (from "Compiler Default").