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1 ------------------------------------------------------------------
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2 This file is part of bzip2/libbzip2, a program and library for
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3 lossless, block-sorting data compression.
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4
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5 bzip2/libbzip2 version 1.0.6 of 6 September 2010
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6 Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
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7
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8 Please read the WARNING, DISCLAIMER and PATENTS sections in the
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9 README file.
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10
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11 This program is released under the terms of the license contained
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12 in the file LICENSE.
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13 ------------------------------------------------------------------
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14
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15 bzip2-1.0.6 should compile without problems on the vast majority of
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16 platforms. Using the supplied Makefile, I've built and tested it
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17 myself for x86-linux and amd64-linux. With makefile.msc, Visual C++
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18 6.0 and nmake, you can build a native Win32 version too. Large file
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19 support seems to work correctly on at least on amd64-linux.
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20
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21 When I say "large file" I mean a file of size 2,147,483,648 (2^31)
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22 bytes or above. Many older OSs can't handle files above this size,
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23 but many newer ones can. Large files are pretty huge -- most files
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24 you'll encounter are not Large Files.
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25
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26 Early versions of bzip2 (0.1, 0.9.0, 0.9.5) compiled on a wide variety
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27 of platforms without difficulty, and I hope this version will continue
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28 in that tradition. However, in order to support large files, I've had
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29 to include the define -D_FILE_OFFSET_BITS=64 in the Makefile. This
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30 can cause problems.
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31
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32 The technique of adding -D_FILE_OFFSET_BITS=64 to get large file
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33 support is, as far as I know, the Recommended Way to get correct large
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34 file support. For more details, see the Large File Support
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35 Specification, published by the Large File Summit, at
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36
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37 http://ftp.sas.com/standards/large.file
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38
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39 As a general comment, if you get compilation errors which you think
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40 are related to large file support, try removing the above define from
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41 the Makefile, ie, delete the line
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42
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43 BIGFILES=-D_FILE_OFFSET_BITS=64
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44
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45 from the Makefile, and do 'make clean ; make'. This will give you a
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46 version of bzip2 without large file support, which, for most
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47 applications, is probably not a problem.
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48
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49 Alternatively, try some of the platform-specific hints listed below.
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50
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51 You can use the spewG.c program to generate huge files to test bzip2's
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52 large file support, if you are feeling paranoid. Be aware though that
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53 any compilation problems which affect bzip2 will also affect spewG.c,
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54 alas.
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55
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56 AIX: I have reports that for large file support, you need to specify
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57 -D_LARGE_FILES rather than -D_FILE_OFFSET_BITS=64. I have not tested
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58 this myself.
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