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diff --git a/kaldi_io/src/tools/openfst/include/fst/log.h b/kaldi_io/src/tools/openfst/include/fst/log.h
new file mode 100644
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--- /dev/null
+++ b/kaldi_io/src/tools/openfst/include/fst/log.h
@@ -0,0 +1,66 @@
+// log.h
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Author: riley@google.com (Michael Riley)
+//
+// \file
+// Google-style logging declarations and inline definitions.
+
+#ifndef FST_LIB_LOG_H__
+#define FST_LIB_LOG_H__
+
+#include <cassert>
+#include <iostream>
+#include <string>
+
+#include <fst/types.h>
+#include <fst/flags.h>
+
+using std::string;
+
+DECLARE_int32(v);
+
+class LogMessage {
+ public:
+  LogMessage(const string &type) : fatal_(type == "FATAL") {
+    std::cerr << type << ": ";
+  }
+  ~LogMessage() {
+    std::cerr << std::endl;
+    if(fatal_)
+      exit(1);
+  }
+  std::ostream &stream() { return std::cerr; }
+
+ private:
+  bool fatal_;
+};
+
+#define LOG(type) LogMessage(#type).stream()
+#define VLOG(level) if ((level) <= FLAGS_v) LOG(INFO)
+
+// Checks
+inline void CHECK(bool x) { assert(x); }
+
+#define CHECK_EQ(x, y) CHECK((x) == (y))
+#define CHECK_LT(x, y) CHECK((x) < (y))
+#define CHECK_GT(x, y) CHECK((x) > (y))
+#define CHECK_LE(x, y) CHECK((x) <= (y))
+#define CHECK_GE(x, y) CHECK((x) >= (y))
+#define CHECK_NE(x, y) CHECK((x) != (y))
+
+// Ports
+#define ATTRIBUTE_DEPRECATED __attribute__((deprecated))
+
+#endif  // FST_LIB_LOG_H__