[clang] [llvm] [PowerPC][AIX] Support #pragma comment copyright for AIX (PR #178184)

[Tony Varghese via cfe-commits]

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@@ -3331,6 +3353,10 @@ void PragmaCommentHandler::HandlePragma(Preprocessor &PP,
     return;
   }
 
+  // Accept and ignore well-formed copyright with empty string.
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tonykuttai wrote:

done

https://github.com/llvm/llvm-project/pull/178184