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

[Sergei Barannikov via cfe-commits]

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@@ -0,0 +1,59 @@
+//===--- TextEncodingConfig.cpp -------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/TextEncodingConfig.h"
+#include "clang/Basic/DiagnosticDriver.h"
+
+using namespace llvm;
+
+llvm::TextEncodingConverter *
+TextEncodingConfig::getConverter(ConversionAction Action) {
+  if (Action == CA_ToSystemEncoding)
+    return ToSystemEncodingConverter;
+  else if (Action == CA_ToExecEncoding)
+    return ToExecEncodingConverter;
+  else
+    return nullptr;
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s-barannikov wrote:

Should be a `switch`

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