When I create UnzipKit in Xcode 7 beta 4, I get a compiler warning in the MiniZip ioapi.h file. For instance:
.../ioapi.h:22:9: warning: macro name is a reserved identifier [-Wreserved-id-macro] #define _ZLIBIOAPI64_H
ioapi.c has many of its own warnings, so I will compile it with -Wno-everything like this:

However, there are no compiler options available for headers:

How to disable a warning without changing the source file? I would prefer not to change it, since this is an external dependency. I also do not want to include it for the whole project, because this is a useful warning for my own code.
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