Check in LLVM r95781.
diff --git a/lib/Driver/Tool.cpp b/lib/Driver/Tool.cpp
new file mode 100644
index 0000000..781e0a7
--- /dev/null
+++ b/lib/Driver/Tool.cpp
@@ -0,0 +1,19 @@
+//===--- Tool.cpp - Compilation Tools -----------------------------------*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Driver/Tool.h"
+
+using namespace clang::driver;
+
+Tool::Tool(const char *_Name, const ToolChain &TC) : Name(_Name),
+ TheToolChain(TC) {
+}
+
+Tool::~Tool() {
+}