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diff --git a/include/avr/version.h b/include/avr/version.h
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+/**
+ * @file avr/iom644PA.h
+ *
+ * @brief Current Version of avr-libc
+ *
+ * This header file defines macros that contain version numbers and
+ * strings describing the current version of avr-libc.
+ *
+ * The version number itself basically consists of three pieces that
+ * are separated by a dot: the major number, the minor number, and
+ * the revision number.  For development versions (which use an odd
+ * minor number), the string representation additionally gets the
+ * date code (YYYYMMDD) appended.
+ *
+ * This file will also be included by \c <avr/io.h>.  That way,
+ * portable tests can be implemented using \c <avr/io.h> that can be
+ * used in code that wants to remain backwards-compatible to library
+ * versions prior to the date when the library version API had been
+ * added, as referenced but undefined C preprocessor macros
+ * automatically evaluate to 0.
+ */
+
+/*
+ *  Copyright (c) 2005, Joerg Wunsch
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * * Neither the name of the copyright holders nor the names of
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ *  @defgroup avr_version avr-libc Version Macros
+ *
+ *  @ingroup avr
+ */
+/**@{*/
+
+#ifndef _AVR_VERSION_H_
+#define _AVR_VERSION_H_
+
+/** \ingroup avr_version
+    String literal representation of the current library version. */
+#define __AVR_LIBC_VERSION_STRING__ "1.6.8"
+
+/** \ingroup avr_version
+    Numerical representation of the current library version.
+
+    In the numerical representation, the major number is multiplied by
+    10000, the minor number by 100, and all three parts are then
+    added.  It is intented to provide a monotonically increasing
+    numerical value that can easily be used in numerical checks.
+ */
+#define __AVR_LIBC_VERSION__        10608UL
+
+/** \ingroup avr_version
+    String literal representation of the release date. */
+#define __AVR_LIBC_DATE_STRING__    "20100211"
+
+/** \ingroup avr_version
+    Numerical representation of the release date. */
+#define __AVR_LIBC_DATE_            20100211UL
+
+/** \ingroup avr_version
+    Library major version number. */
+#define __AVR_LIBC_MAJOR__          1
+
+/** \ingroup avr_version
+    Library minor version number. */
+#define __AVR_LIBC_MINOR__          6
+
+/** \ingroup avr_version
+    Library revision number. */
+#define __AVR_LIBC_REVISION__       8
+
+/**@}*/
+#endif /* _AVR_VERSION_H_ */