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diff --git a/common/console.h b/common/console.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ */
+
+#ifndef COMMON_CONSOLE_H
+#define COMMON_CONSOLE_H
+
+#include "common/scummsys.h"
+
+namespace Common {
+
+/**
+ * An output formatter takes a source string and 'decorates' it with
+ * extra information, storing the result in a destination buffer.
+ * A typical use is to (optionally) enhance the output given by
+ * the error() and debug() functions with extra information on
+ * the state of the active engine.
+ */
+typedef void (*OutputFormatter)(char *dst, const char *src, size_t dstSize);
+
+/**
+ * Set the output formatter used by error().
+ */
+void setErrorOutputFormatter(OutputFormatter f);
+
+
+/**
+ * A callback which is invoked by error() just before aborting.
+ * A typical example would be a function which shows a debug
+ * console and displays the given message in it.
+ */
+typedef void (*ErrorHandler)(const char *msg);
+
+/**
+ * Set a callback that is invoked by error() after the error
+ * message has been printed, but before the application is
+ * terminated.
+ * This can be used to e.g. show a debugger console.
+ */
+void setErrorHandler(ErrorHandler handler);
+
+}	// End of namespace Common
+
+
+#if defined(__GNUC__)
+void error(const char *s, ...) GCC_PRINTF(1, 2) NORETURN;
+#else
+void NORETURN error(const char *s, ...);
+#endif
+
+#ifdef DISABLE_TEXT_CONSOLE
+
+inline int printf(const char *s, ...) { return 0; }
+
+inline void warning(const char *s, ...) {}
+
+#else
+
+/**
+ * Print a warning message to the text console (stderr).
+ * Automatically prepends the text "WARNING: " and appends
+ * an exclamation mark and a newline.
+ */
+void warning(const char *s, ...) GCC_PRINTF(1, 2);
+
+#endif
+
+
+#endif