[lld] [ELF] Add context-aware diagnostic functions (PR #112319)

[Sam Clegg via llvm-commits]

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@@ -152,6 +152,19 @@ void message(const Twine &msg, llvm::raw_ostream &s = outs());
 void warn(const Twine &msg);
 uint64_t errorCount();
 
+enum class DiagLevel { Log, Warn, Err, Fatal };
+
+class SyncStream {
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sbc100 wrote:

I'm curious what the "Sync" part means here?    Can we come up with a more meaningful name?   Something that signifies this relates to logging/error output maybe?

https://github.com/llvm/llvm-project/pull/112319