Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/ExecutionEngine/OrcMCJITReplacement.h b/linux-x64/clang/include/llvm/ExecutionEngine/OrcMCJITReplacement.h
new file mode 100644
index 0000000..4cd5648
--- /dev/null
+++ b/linux-x64/clang/include/llvm/ExecutionEngine/OrcMCJITReplacement.h
@@ -0,0 +1,38 @@
+//===---- OrcMCJITReplacement.h - Orc-based MCJIT replacement ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file forces OrcMCJITReplacement to link in on certain operating systems.
+// (Windows).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_ORCMCJITREPLACEMENT_H
+#define LLVM_EXECUTIONENGINE_ORCMCJITREPLACEMENT_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include <cstdlib>
+
+extern "C" void LLVMLinkInOrcMCJITReplacement();
+
+namespace {
+ struct ForceOrcMCJITReplacementLinking {
+ ForceOrcMCJITReplacementLinking() {
+ // We must reference OrcMCJITReplacement in such a way that compilers will
+ // not delete it all as dead code, even with whole program optimization,
+ // yet is effectively a NO-OP. As the compiler isn't smart enough to know
+ // that getenv() never returns -1, this will do the job.
+ if (std::getenv("bar") != (char*) -1)
+ return;
+
+ LLVMLinkInOrcMCJITReplacement();
+ }
+ } ForceOrcMCJITReplacementLinking;
+}
+
+#endif