[clang] [clang-tools-extra] [llvm] [clang] Introduce diagnostics suppression mappings (PR #112517)

[kadir çetinkaya via cfe-commits]

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@@ -8979,3 +8979,8 @@ def wasm_opt : Flag<["--"], "wasm-opt">,
   Group<m_Group>,
   HelpText<"Enable the wasm-opt optimizer (default)">,
   MarshallingInfoNegativeFlag<LangOpts<"NoWasmOpt">>;
+
+def warning_suppression_mappings_EQ : Joined<["--"],
+  "warning-suppression-mappings=">, Group<Diag_Group>,
+  HelpText<"File containing list of sources to suppress diagnostics for. See XXX for format">,
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kadircet wrote:

oops, i was planning to refer to clang docs initially, but then noticed that none of the existing command line flags references clang webpage hence decided not to break that convention, but forgot to drop this one.

https://github.com/llvm/llvm-project/pull/112517