Fix for PR 5181.

llvm-svn: 84051
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 23c8317..50ebb49 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -1246,10 +1246,13 @@
   case 5: Supported = !memcmp(Format, "scanf", 5); break;
   case 6: Supported = !memcmp(Format, "printf", 6); break;
   case 7: Supported = !memcmp(Format, "printf0", 7) ||
-                      !memcmp(Format, "strfmon", 7); break;
+                      !memcmp(Format, "strfmon", 7) ||
+                      !memcmp(Format, "cmn_err", 7); break;
   case 8:
     Supported = (is_strftime = !memcmp(Format, "strftime", 8)) ||
                 (is_NSString = !memcmp(Format, "NSString", 8)) ||
+                !memcmp(Format, "vcmn_err", 8) ||
+                !memcmp(Format, "zcmn_err", 8) ||
                 (is_CFString = !memcmp(Format, "CFString", 8));
     break;
   }