[clang] [llvm] Enable fexec-charset option (PR #138895)

[Sergei Barannikov via cfe-commits]

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@@ -544,6 +545,11 @@ void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
 
   if (GetDependencyDirectives)
     PP->setDependencyDirectivesGetter(*GetDependencyDirectives);
+
+  if (auto EC = TextEncodingConfig::setConvertersFromOptions(
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s-barannikov wrote:

Can this be done in TargetInfo? It sets up representation of types, could as well configure encodings. Maybe clang folks can advise here.

https://github.com/llvm/llvm-project/pull/138895