/home/USERNAME/tmp/darling/darling/src/external/objc4/runtime/NSObject.mm:1991:2: error: prefix attribute must be followed by an interface or protocol
@implementation __NSUnrecognizedTaggedPointer
 ^
1 error generated.
make[2]: *** [src/external/objc4/runtime/CMakeFiles/objc_obj.dir/build.make:89: src/external/objc4/runtime/CMakeFiles/objc_obj.dir/NSObject.mm.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:11436: src/external/objc4/runtime/CMakeFiles/objc_obj.dir/all] Error 2
make: *** [Makefile:132: all] Error 2