I am working with cinterops on my M1 Mac. I am writing my .def file, but the compilation fails with: All supported Xcode versions should support objc_fixed_enum. The line triggering this error is in one of the header files I am using, GPBBootstrap.h from Objective-C Protobuf:

#if !__has_feature(objc_fixed_enum)
 #error All supported Xcode versions should support objc_fixed_enum.
#endif

Can I enable this support in my .def file? Sorry if this is not the right place to ask this question.

What XCode versions does the library have support for?

• According to their Github Page: Xcode 10.3 (or later).

I wonder if this is because cinterop uses a separate toolchain that provides a raw compiler (at least for C/C++). I wonder if it doesn’t use xcodebuild for Objective-C?