The warning this inhibits, -Wobjc-root-class, is opt-in for now. However, all clang unit tests that would trigger
the warning have been updated to use -Wno-objc-root-class. <rdar://problem/7446698>
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154187 91177308-0d34-0410-b5e6-96231b3b80d8
masks an existing method in its primary class, class extensions,
and primary class's non-optional protocol methods; as primary
class, or one of its subclass's will implement this method.
This warning has potential of being noisy so it has its own
group. // rdar://7020493
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Patrick Beard
Argyrios Kyrtzidis
Ted Kremenek
Fariborz Jahanian