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diff --git a/src/liblzma/api/lzma/version.h b/src/liblzma/api/lzma/version.h
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+++ b/src/liblzma/api/lzma/version.h
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+/**
+ * \file        lzma/version.h
+ * \brief       Version number
+ *
+ * \author      Copyright (C) 1999-2006 Igor Pavlov
+ * \author      Copyright (C) 2007 Lasse Collin
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ */
+
+#ifndef LZMA_H_INTERNAL
+#	error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief       Compile-time version number
+ *
+ * The version number is of format xyyyuuus where
+ *  - x is the major LZMA SDK version
+ *  - yyy is the minor LZMA SDK version
+ *  - uuu is LZMA Utils version (reset to zero every time SDK version
+ *    is incremented)
+ *  - s indicates stability: 0 = alpha, 1 = beta, 2 = stable
+ */
+#define LZMA_VERSION UINT32_C(40420010)
+
+
+/**
+ * \brief       liblzma version number as an integer
+ *
+ * This is the value of LZMA_VERSION macro at the compile time of liblzma.
+ * This allows the application to compare if it was built against the same,
+ * older, or newer version of liblzma that is currently running.
+ */
+extern const uint32_t lzma_version_number;
+
+
+/**
+ * \brief       Returns versions number of liblzma as a string
+ *
+ * This function may be useful if you want to display which version of
+ * libilzma your application is currently using.
+ *
+ * \return      Returns a pointer to a statically allocated string constant,
+ *              which contains the version number of liblzma. The format of
+ *              the version string is usually (but not necessarily) x.y.z
+ *              e.g. "4.42.1". Alpha and beta versions contain a suffix
+ *              ("4.42.0alpha").
+ */
+extern const char *const lzma_version_string;