1 For your convenience and allowed by zlib's license terms:
2 http://www.gzip.org/zlib/zlib_license.html a copy of the zlib source
3 is bundled with SimGear in $(top_srcdir)/src-libs/. You must have
4 zlib installed before you can build SimGear.
6 - Most linux distributions have a zlib package. For linux
7 developers, we recommend ysou install your distributions package
8 rather than building from source.
10 - Cygwin installs zlib automatically.
12 - For developers on most other platforms, you will have to build
13 zlib from source and install it yourself. For your convenience a
14 tar ball of the zlib source is included with the simgear source
15 distribution. Untar the zlib source, and follow the included
16 build and installation instructions.
18 Once zlib is installed you can return to configuring and building
21 We now send you to the official zlib README ...
24 =============================================================================
27 zlib 1.1.4 is a general purpose data compression library. All the code
28 is thread safe. The data format used by the zlib library
29 is described by RFCs (Request for Comments) 1950 to 1952 in the files
30 http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
31 format) and rfc1952.txt (gzip format). These documents are also available in
32 other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
34 All functions of the compression library are documented in the file zlib.h
35 (volunteer to write man pages welcome, contact jloup@gzip.org). A usage
36 example of the library is given in the file example.c which also tests that
37 the library is working correctly. Another example is given in the file
38 minigzip.c. The compression library itself is composed of all source files
39 except example.c and minigzip.c.
41 To compile all files and run the test program, follow the instructions
42 given at the top of Makefile. In short "make test; make install"
43 should work for most machines. For Unix: "./configure; make test; make install"
44 For MSDOS, use one of the special makefiles such as Makefile.msc.
45 For VMS, use Make_vms.com or descrip.mms.
47 Questions about zlib should be sent to <zlib@gzip.org>, or to
48 Gilles Vollant <info@winimage.com> for the Windows DLL version.
49 The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/
50 Before reporting a problem, please check this site to verify that
51 you have the latest version of zlib; otherwise get the latest version and
52 check whether the problem still exists or not.
54 PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html
55 before asking for help.
57 Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
58 issue of Dr. Dobb's Journal; a copy of the article is available in
59 http://dogma.net/markn/articles/zlibtool/zlibtool.htm
61 The changes made in version 1.1.4 are documented in the file ChangeLog.
62 The only changes made since 1.1.3 are bug corrections:
64 - ZFREE was repeated on same allocation on some error conditions.
65 This creates a security problem described in
66 http://www.zlib.org/advisory-2002-03-11.txt
67 - Returned incorrect error (Z_MEM_ERROR) on some invalid data
68 - Avoid accesses before window for invalid distances with inflate window
70 - force windowBits > 8 to avoid a bug in the encoder for a window size
71 of 256 bytes. (A complete fix will be available in 1.1.5).
73 The beta version 1.1.5beta includes many more changes. A new official
74 version 1.1.5 will be released as soon as extensive testing has been
78 Unsupported third party contributions are provided in directory "contrib".
80 A Java implementation of zlib is available in the Java Development Kit
81 http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
82 See the zlib home page http://www.zlib.org for details.
84 A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
85 is in the CPAN (Comprehensive Perl Archive Network) sites
86 http://www.cpan.org/modules/by-module/Compress/
88 A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
89 is available in Python 1.5 and later versions, see
90 http://www.python.org/doc/lib/module-zlib.html
92 A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com>
93 is availlable at http://www.westend.com/~kupries/doc/trf/man/man.html
95 An experimental package to read and write files in .zip format,
96 written on top of zlib by Gilles Vollant <info@winimage.com>, is
97 available at http://www.winimage.com/zLibDll/unzip.html
98 and also in the contrib/minizip directory of zlib.
101 Notes for some targets:
103 - To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
104 and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL
105 The zlib DLL support was initially done by Alessandro Iacopetti and is
106 now maintained by Gilles Vollant <info@winimage.com>. Check the zlib DLL
107 home page at http://www.winimage.com/zLibDll
109 From Visual Basic, you can call the DLL functions which do not take
110 a structure as argument: compress, uncompress and all gz* functions.
111 See contrib/visual-basic.txt for more information, or get
112 http://www.tcfb.com/dowseware/cmp-z-it.zip
114 - For 64-bit Irix, deflate.c must be compiled without any optimization.
115 With -O, one libpng test fails. The test works in 32 bit mode (with
116 the -n32 compiler flag). The compiler bug has been reported to SGI.
118 - zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1
119 it works when compiled with cc.
121 - on Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1
122 is necessary to get gzprintf working correctly. This is done by configure.
124 - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works
125 with other compilers. Use "make test" to check your compiler.
127 - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
129 - For Turbo C the small model is supported only with reduced performance to
130 avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
132 - For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html
133 Per Harald Myrvang <perm@stud.cs.uit.no>
138 The deflate format used by zlib was defined by Phil Katz. The deflate
139 and zlib specifications were written by L. Peter Deutsch. Thanks to all the
140 people who reported problems and suggested various improvements in zlib;
141 they are too numerous to cite here.
145 (C) 1995-2002 Jean-loup Gailly and Mark Adler
147 This software is provided 'as-is', without any express or implied
148 warranty. In no event will the authors be held liable for any damages
149 arising from the use of this software.
151 Permission is granted to anyone to use this software for any purpose,
152 including commercial applications, and to alter it and redistribute it
153 freely, subject to the following restrictions:
155 1. The origin of this software must not be misrepresented; you must not
156 claim that you wrote the original software. If you use this software
157 in a product, an acknowledgment in the product documentation would be
158 appreciated but is not required.
159 2. Altered source versions must be plainly marked as such, and must not be
160 misrepresented as being the original software.
161 3. This notice may not be removed or altered from any source distribution.
163 Jean-loup Gailly Mark Adler
164 jloup@gzip.org madler@alumni.caltech.edu
166 If you use the zlib library in a product, we would appreciate *not*
167 receiving lengthy legal documents to sign. The sources are provided
168 for free but without warranty of any kind. The library has been
169 entirely written by Jean-loup Gailly and Mark Adler; it does not
170 include third-party code.
172 If you redistribute modified sources, we would appreciate that you include
173 in the file ChangeLog history information documenting your changes.