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diff --git a/gnuradio-runtime/include/gr_error_handler.h b/gnuradio-runtime/include/gr_error_handler.h
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+++ b/gnuradio-runtime/include/gr_error_handler.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2005 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+/*
+ * This code is based on error.hh from the "Click Modular Router".
+ * Original copyright follows:
+ */
+/*
+ * error.{cc,hh} -- flexible classes for error reporting
+ * Eddie Kohler
+ *
+ * Copyright (c) 1999-2000 Massachusetts Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, subject to the conditions
+ * listed in the Click LICENSE file. These conditions include: you must
+ * preserve this copyright notice, and you cannot mention the copyright
+ * holders in advertising related to the Software without their permission.
+ * The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
+ * notice is a summary of the Click LICENSE file; the license in that file is
+ * legally binding.
+ */
+
+#ifndef INCLUDED_GR_ERROR_HANDLER_H
+#define INCLUDED_GR_ERROR_HANDLER_H
+
+#include <gr_runtime_api.h>
+#include <stdarg.h>
+#include <string>
+#include <cstdio>  // for FILE
+
+/*!
+ * \brief abstract error handler
+ * \ingroup base
+ */
+class GR_RUNTIME_API gr_error_handler {
+public:
+  enum seriousness {
+    ERR_DEBUG		= 0x00000000,
+    ERR_MESSAGE		= 0x00010000,
+    ERR_WARNING		= 0x00020000,
+    ERR_ERROR		= 0x00030000,
+    ERR_FATAL		= 0x00040000
+  };
+
+  gr_error_handler() {}
+  virtual ~gr_error_handler();
+
+  static gr_error_handler *default_handler();
+  static gr_error_handler *silent_handler();
+
+  static bool has_default_handler();
+  static void set_default_handler(gr_error_handler *errh);
+
+  void debug(const char *format, ...);
+  void message(const char *format, ...);
+  void warning(const char *format, ...);
+  void error(const char *format, ...);
+  void fatal(const char *format, ...);
+
+  virtual int nwarnings() const = 0;
+  virtual int nerrors() const = 0;
+  virtual void reset_counts() = 0;
+
+  void verror(seriousness s, const char *format, va_list);
+  void verror_text(seriousness s, const std::string &text);
+
+protected:
+  virtual void count_error(seriousness s) = 0;
+  virtual void handle_text(seriousness s, const std::string &str) = 0;
+  std::string make_text(seriousness s, const char *format, va_list);
+};
+
+
+class GR_RUNTIME_API gr_base_error_handler : public gr_error_handler {
+  int	d_nwarnings;
+  int	d_nerrors;
+
+public:
+  gr_base_error_handler() : d_nwarnings(0), d_nerrors(0) {}
+  int nwarnings() const { return d_nwarnings; }
+  int nerrors() const   { return d_nerrors; }
+  void reset_counts()   { d_nwarnings = d_nerrors = 0; }
+  void count_error(seriousness s);
+};
+
+class GR_RUNTIME_API gr_file_error_handler : public gr_base_error_handler {
+  FILE		*d_file;
+  int		 d_fd;
+public:
+  gr_file_error_handler(FILE *file);
+  gr_file_error_handler(int file_descriptor);
+  ~gr_file_error_handler();
+
+  void handle_text(seriousness s, const std::string &str);
+};
+
+#endif /* INCLUDED_GR_ERROR_HANDLER_H */