[clang] [clang-repl] Set up native platform support if ORC Runtime available (PR #217988)

[via cfe-commits]

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@@ -413,6 +413,16 @@ IncrementalExecutorBuilder::create(llvm::orc::ThreadSafeContext &TSC,
     if (!JB)
       return JB.takeError();
     JITBuilder = std::move(*JB);
+    if (!OrcRuntimePath.empty()) {
+      JITBuilder->setPlatformSetUp(
+          llvm::orc::ExecutorNativePlatform(OrcRuntimePath));
+    } else {
+      auto Err = llvm::make_error<llvm::StringError>(
+          "OrcRuntime not found, running JIT without native platform support "
+          "and some features may not work.",
+          std::error_code());
+      llvm::logAllUnhandledErrors(std::move(Err), llvm::errs(), "warning: ");
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khanxmetu wrote:

not sure if this needs to be a user-level warning or a `LLVM_DEBUG` log

https://github.com/llvm/llvm-project/pull/217988