I’ve added a .mm Objective-C++ file to an old C++ project.  It has no code in 
it yet, except an empty Objecive-C @implementation.  Also, it #imports a 
counterpart .h file which in turn #imports <Cocoa/Cocoa.h>.

In Xcode 6.1, the compiler pukes on #import <Cocoa/Cocoa.h>, as though it does 
not know any Objective-C.  Testing the __OBJC__ macro, it is undefined.

The File Inspector indicates that my .mm file’s type is “Default - 
Objective-C++ Source” and the counterpart .h is  “Default - C Header”.  Looks 
OK to me.  Is there another Objective-C switch that needs to be flipped on 
somewhere?

Thank you,

Jerry
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