[clang] [Parser][ObjC] Add -Wobjc-prefix-length warning option. (PR #97597)

[Alastair Houghton via cfe-commits]

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@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 %s -Wobjc-prefixes=NS,NSCF,NSURL -fsyntax-only -verify
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al45tair wrote:

Hmmm, maybe, yes. Not hard to add.

https://github.com/llvm/llvm-project/pull/97597