--- /dev/null
+++ C/LZMA_ZLibCompat.h
@@ -0,0 +1,39 @@
+#ifndef LZMA_ZLibCompat
+#define LZMA_ZLibCompat
+
+#include <stddef.h>
+
+#include <zlib.h>
+
+/* CLzmaEncProps */
+#define ZLIB_COMPAT__THE_ONLY_SUPPORTED_COMPRESSION_LEVEL 9
+#define ZLIB_COMPAT__DICT_SIZE (1 << (ZLIB_COMPAT__THE_ONLY_SUPPORTED_COMPRESSION_LEVEL + 14))
+#define ZLIB_COMPAT__LC 3
+#define ZLIB_COMPAT__LP 0
+#define ZLIB_COMPAT__PB 2
+#define ZLIB_COMPAT__ALGO 2
+#define ZLIB_COMPAT__FB 128
+#define ZLIB_COMPAT__MATCH_FINDER_MODE ((const wchar_t *)L"BT4") /* BinTree-mode with numHashBytes=4 */
+#define ZLIB_COMPAT__MC 0 /* 0 means "use default autocalculated value", autocalculated from fb and btMode values, see LzmaEncProps_Normalize for details */
+#define ZLIB_COMPAT__WRITE_END_MARK 1
+
+#define LZMA_ZLIB_COMPAT(name) name##_lzma_zlib_compat
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int (*zlib_compress_t)                   (Bytef *    , uLongf *       , const Bytef *      , uLong          );
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(compress)   (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
+
+typedef int (*zlib_compress2_t)                  (Bytef *    , uLongf *       , const Bytef *      , uLong          , int      );
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(compress2)  (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);
+
+typedef int (*zlib_uncompress_t)                 (Bytef *    , uLongf *       , const Bytef *      , uLong          );
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(uncompress) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- C/LzmaLib/makefile.gcc
+++ C/LzmaLib/makefile.gcc
@@ -17,6 +17,8 @@
 	LzmaEnc.o \
 	LzmaLib.o
 
+OBJS += LZMA_ZLibCompat.o
+
 all: $(PROG)
 
 $(PROG): $(OBJS)
--- /dev/null
+++ C/LZMA_ZLibCompat.c
@@ -0,0 +1,105 @@
+#include <stdio.h>
+
+#include "LZMA_ZLibCompat.h"
+
+#include "Types.h"
+#include "LzmaLib.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(compress) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen) {
+	return LZMA_ZLIB_COMPAT(compress2)(dest, destLen, source, sourceLen, ZLIB_COMPAT__THE_ONLY_SUPPORTED_COMPRESSION_LEVEL);
+}
+
+/*
+  compress2 returns (taken from zlib.h)
+   - Z_OK if success,
+   - Z_MEM_ERROR if there was not enough memory,
+   - Z_BUF_ERROR if there was not enough room in the output buffer,
+   - Z_STREAM_ERROR if the level parameter is invalid.
+*/
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(compress2) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level) {
+	if (level != ZLIB_COMPAT__THE_ONLY_SUPPORTED_COMPRESSION_LEVEL) {
+		return Z_STREAM_ERROR;
+	}
+
+	Byte props[LZMA_PROPS_SIZE];
+	size_t propsSize = LZMA_PROPS_SIZE;
+	SRes result = LzmaCompress(
+		dest,
+		(size_t*)destLen,
+		source,
+		sourceLen,
+		props,
+		&propsSize,
+		level,
+		ZLIB_COMPAT__DICT_SIZE,
+		ZLIB_COMPAT__LC,
+		ZLIB_COMPAT__LP,
+		ZLIB_COMPAT__PB,
+		ZLIB_COMPAT__ALGO,
+		ZLIB_COMPAT__FB,
+		ZLIB_COMPAT__MATCH_FINDER_MODE,
+		ZLIB_COMPAT__MC,
+		ZLIB_COMPAT__WRITE_END_MARK,
+		1 /* numThreads */
+	);
+
+	if (result != SZ_OK) {
+		fprintf(stderr, "%s failed with code=%d\n", __FUNCTION__, result);
+	}
+
+	switch (result) {
+		case SZ_ERROR_MEM:
+			return Z_MEM_ERROR;
+		case SZ_ERROR_PARAM:
+			return Z_STREAM_ERROR;
+		case SZ_ERROR_OUTPUT_EOF: /* output buffer overflow */
+			return Z_BUF_ERROR;
+		default:
+			return (result == SZ_OK) ? Z_OK : Z_BUF_ERROR;
+	}
+}
+
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(uncompress) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen) {
+	Byte props[LZMA_PROPS_SIZE];
+	{
+		int i;
+		UInt32 dictSize = ZLIB_COMPAT__DICT_SIZE;
+		props[0] = (Byte)((ZLIB_COMPAT__PB * 5 + ZLIB_COMPAT__LP) * 9 + ZLIB_COMPAT__LC);
+		for (i = 1; i<LZMA_PROPS_SIZE; i++) {
+			props[i] = (Byte)(dictSize >> (8 * (i-1)));
+		}
+	}
+
+	size_t processedLen = sourceLen;
+	SRes result = LzmaUncompress(
+		dest,
+		(size_t*)destLen,
+		source,
+		&processedLen,
+		props,
+		LZMA_PROPS_SIZE
+	);
+
+	if (sourceLen - processedLen > 7) { /* TODO: understand where these 5 till 7 extra bytes come from - props encoded within the stream ? */
+		fprintf(stderr, "%s: warning sourceLen!=processedLen, sourceLen = %lu, processedLen = %zu, delta = %ld\n", __FUNCTION__, sourceLen, processedLen, sourceLen-processedLen);
+	}
+
+	switch (result) {
+		case SZ_ERROR_MEM:
+			return Z_MEM_ERROR;
+		case SZ_ERROR_DATA:         /* data error */
+		case SZ_ERROR_INPUT_EOF:    /* unexpected EOF in input buffer, i.e. decoder expects more bytes in input buffer */
+		case SZ_ERROR_UNSUPPORTED:  /* unsupported properties */
+			return Z_DATA_ERROR;
+		default:
+			return (result == SZ_OK /*&& sourceLen == processedLen*/) ? Z_OK : Z_DATA_ERROR;
+	}
+}
+
+#ifdef __cplusplus
+}
+#endif
--- CPP/7zip/Compress/LZMA_Lib/makefile.gcc
+++ CPP/7zip/Compress/LZMA_Lib/makefile.gcc
@@ -37,6 +37,8 @@
 	StringToInt.o \
 	MyVector.o
 
+CPP_OBJS += LZMA_ZLibCompat.o
+
 all: $(PROG)
 
 $(PROG): $(C_OBJS) $(CPP_OBJS)
--- /dev/null
+++ CPP/7zip/Compress/LZMA_ZLibCompat.cpp
@@ -0,0 +1,271 @@
+/*
+ * lzma zlib simplified wrapper
+ *
+ * Copyright (c) 2005-2006 Oleg I. Vdovikin <oleg@cs.msu.su>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place,
+ * Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "LZMA_ZLibCompat.h"
+
+#ifdef WIN32
+#include <initguid.h>
+#else
+#define INITGUID
+#endif
+
+#include "../../Common/MyWindows.h"
+#include "LzmaDecoder.h"
+#include "LzmaEncoder.h"
+
+#define STG_E_SEEKERROR                  ((HRESULT)0x80030019L)
+#define STG_E_MEDIUMFULL                 ((HRESULT)0x80030070L)
+
+class CInMemoryStream:
+  public IInStream,
+  public IStreamGetSize,
+  public CMyUnknownImp
+{
+public:
+  CInMemoryStream(const Bytef *data, UInt64 size) :
+	  m_data(data), m_size(size), m_offset(0) {}
+
+  virtual ~CInMemoryStream() {}
+
+  MY_UNKNOWN_IMP2(IInStream, IStreamGetSize)
+
+  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize)
+  {
+	  if (size > m_size - m_offset)
+		  size = m_size - m_offset;
+
+	  if (size) {
+		  memcpy(data, m_data + m_offset, size);
+	  }
+
+	  m_offset += size;
+
+	  if (processedSize)
+		  *processedSize = size;
+
+	  return S_OK;
+  }
+
+  STDMETHOD(ReadPart)(void *data, UInt32 size, UInt32 *processedSize)
+  {
+	return Read(data, size, processedSize);
+  }
+
+  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
+  {
+	  Int64 _offset;
+
+	  if (seekOrigin == STREAM_SEEK_SET) _offset = offset;
+	  else if (seekOrigin == STREAM_SEEK_CUR) _offset = m_offset + offset;
+	  else if (seekOrigin == STREAM_SEEK_END) _offset = m_size;
+	  else return STG_E_INVALIDFUNCTION;
+
+	  if (_offset < 0 || ((UInt64)_offset) > m_size)
+		  return STG_E_SEEKERROR;
+
+	  m_offset = _offset;
+
+	  if (newPosition)
+		  *newPosition = m_offset;
+
+	  return S_OK;
+  }
+
+  STDMETHOD(GetSize)(UInt64 *size)
+  {
+	  *size = m_size;
+	  return S_OK;
+  }
+protected:
+	const Bytef *m_data;
+	UInt64 m_size;
+	UInt64 m_offset;
+};
+
+class COutMemoryStream:
+  public IOutStream,
+  public CMyUnknownImp
+{
+public:
+  COutMemoryStream(Bytef *data, UInt64 maxsize) :
+	  m_data(data), m_size(0), m_maxsize(maxsize), m_offset(0) {}
+  virtual ~COutMemoryStream() {}
+
+  MY_UNKNOWN_IMP1(IOutStream)
+
+  STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize)
+  {
+	  if (size > m_maxsize - m_offset)
+		  size = m_maxsize - m_offset;
+
+	  if (size) {
+		  memcpy(m_data + m_offset, data, size);
+	  }
+
+	  m_offset += size;
+
+	  if (m_offset > m_size)
+		m_size = m_offset;
+
+	  if (processedSize)
+		  *processedSize = size;
+
+	  return S_OK;
+  }
+
+  STDMETHOD(WritePart)(const void *data, UInt32 size, UInt32 *processedSize)
+  {
+	  return Write(data, size, processedSize);
+  }
+
+  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
+  {
+	  Int64 _offset;
+
+	  if (seekOrigin == STREAM_SEEK_SET) _offset = offset;
+	  else if (seekOrigin == STREAM_SEEK_CUR) _offset = m_offset + offset;
+	  else if (seekOrigin == STREAM_SEEK_END) _offset = m_size;
+	  else return STG_E_INVALIDFUNCTION;
+
+	  if (_offset < 0 || ((UInt64)_offset) > m_maxsize)
+		  return STG_E_SEEKERROR;
+
+	  m_offset = _offset;
+
+	  if (newPosition)
+		  *newPosition = m_offset;
+
+	  return S_OK;
+  }
+
+  STDMETHOD(SetSize)(Int64 newSize)
+  {
+	  if ((UInt64)newSize > m_maxsize)
+		  return STG_E_MEDIUMFULL;
+
+	  return S_OK;
+  }
+protected:
+	Bytef *m_data;
+	UInt64 m_size;
+	UInt64 m_maxsize;
+	UInt64 m_offset;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(compress) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen) {
+	return LZMA_ZLIB_COMPAT(compress2)(dest, destLen, source, sourceLen, ZLIB_COMPAT__THE_ONLY_SUPPORTED_COMPRESSION_LEVEL);
+}
+
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(compress2) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level) {
+	if (level != ZLIB_COMPAT__THE_ONLY_SUPPORTED_COMPRESSION_LEVEL) {
+		return Z_STREAM_ERROR;
+	}
+
+	CInMemoryStream *inStreamSpec = new CInMemoryStream(source, sourceLen);
+	CMyComPtr<ISequentialInStream> inStream = inStreamSpec;
+
+	COutMemoryStream *outStreamSpec = new COutMemoryStream(dest, *destLen);
+	CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
+
+	NCompress::NLzma::CEncoder *encoderSpec =
+		new NCompress::NLzma::CEncoder;
+	CMyComPtr<ICompressCoder> encoder = encoderSpec;
+
+	PROPID propIDs[] =
+	{
+		NCoderPropID::kDictionarySize,
+		NCoderPropID::kPosStateBits,
+		NCoderPropID::kLitContextBits,
+		NCoderPropID::kLitPosBits,
+		NCoderPropID::kAlgorithm,
+		NCoderPropID::kNumFastBytes,
+		NCoderPropID::kMatchFinder,
+		NCoderPropID::kEndMarker
+	};
+	const int kNumProps = sizeof(propIDs) / sizeof(propIDs[0]);
+
+	PROPVARIANT properties[kNumProps];
+	for (int p = 0; p < 6; p++)
+		properties[p].vt = VT_UI4;
+	properties[0].ulVal = UInt32(ZLIB_COMPAT__DICT_SIZE);         // kDictionarySize
+	properties[1].ulVal = UInt32(ZLIB_COMPAT__PB);                // kPosStateBits
+	properties[2].ulVal = UInt32(ZLIB_COMPAT__LC);                // kLitContextBits
+	properties[3].ulVal = UInt32(ZLIB_COMPAT__LP);                // kLitPosBits
+	properties[4].ulVal = UInt32(ZLIB_COMPAT__ALGO);              // kAlgorithm
+	properties[5].ulVal = UInt32(ZLIB_COMPAT__FB);                // kNumFastBytes
+
+	properties[6].vt = VT_BSTR;
+	properties[6].bstrVal = (BSTR)ZLIB_COMPAT__MATCH_FINDER_MODE; // kMatchFinder
+
+	properties[7].vt = VT_BOOL;
+	properties[7].boolVal = ZLIB_COMPAT__WRITE_END_MARK ? VARIANT_TRUE : VARIANT_FALSE; // kEndMarker
+
+	if (encoderSpec->SetCoderProperties(propIDs, properties, kNumProps) != S_OK)
+		return Z_MEM_ERROR;
+
+	HRESULT result = encoder->Code(inStream, outStream, 0, 0, 0);
+	if (result == E_OUTOFMEMORY) {
+		return Z_MEM_ERROR;
+	} else if (result != S_OK) {
+		return Z_BUF_ERROR;
+	}
+
+	UInt64 fileSize;
+	outStreamSpec->Seek(0, STREAM_SEEK_END, &fileSize);
+	*destLen = fileSize;
+
+	return Z_OK;
+}
+
+ZEXTERN int ZEXPORT LZMA_ZLIB_COMPAT(uncompress) (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen) {
+	CInMemoryStream *inStreamSpec = new CInMemoryStream(source, sourceLen);
+	CMyComPtr<ISequentialInStream> inStream = inStreamSpec;
+
+	COutMemoryStream *outStreamSpec = new COutMemoryStream(dest, *destLen);
+	CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
+
+	NCompress::NLzma::CDecoder *decoderSpec = new NCompress::NLzma::CDecoder;
+	CMyComPtr<ICompressCoder> decoder = decoderSpec;
+
+	if (decoderSpec->SetDecoderPropertiesRaw(ZLIB_COMPAT__LC, ZLIB_COMPAT__LP, ZLIB_COMPAT__PB, ZLIB_COMPAT__DICT_SIZE) != S_OK) {
+		return Z_DATA_ERROR;
+	}
+
+	UInt64 fileSize = *destLen;
+	if (decoder->Code(inStream, outStream, 0, &fileSize, 0) != S_OK) {
+		return Z_DATA_ERROR;
+	}
+
+	outStreamSpec->Seek(0, STREAM_SEEK_END, &fileSize);
+	*destLen = fileSize;
+
+	return Z_OK;
+}
+
+#ifdef __cplusplus
+}
+#endif
