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export libpng and zlib so Windows and OS/2 builds cleanly.

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1
2Installing libpng version 1.2.8 - December 3, 2004
3
4Before installing libpng, you must first install zlib. zlib
5can usually be found wherever you got libpng. zlib can be
6placed in another directory, at the same level as libpng.
7Note that your system might already have a preinstalled
8zlib, but you will still need to have access to the
9zlib.h and zconf.h include files that correspond to the
10version of zlib that's installed.
11
12You can rename the directories that you downloaded (they
13might be called "libpng-1.2.8" or "lpng109" and "zlib-1.2.1"
14or "zlib121") so that you have directories called "zlib" and "libpng".
15
16Your directory structure should look like this:
17
18 .. (the parent directory)
19 libpng (this directory)
20 INSTALL (this file)
21 README
22 *.h
23 *.c
24 contrib
25 gregbook
26 pngminus
27 pngsuite
28 visupng
29 projects
30 beos
31 c5builder (Borland)
32 visualc6 (msvc)
33 netware.txt
34 wince.txt
35 scripts
36 makefile.*
37 pngtest.png
38 etc.
39 zlib
40 README
41 *.h
42 *.c
43 contrib
44 etc.
45
46If the line endings in the files look funny, you may wish to get the other
47distribution of libpng. It is available in both tar.gz (UNIX style line
48endings) and zip (DOS style line endings) formats.
49
50
51If you are building libpng with MSVC, you can enter the
52libpng projects\visualc6 directory and follow the instructions in
53projects\visualc6\README.txt.
54
55You can build libpng for WindowsCE by downloading and installing
56the projects\wince directory as instructed in the projects\wince.txt file, and
57then following the instructions in the README* files. Similarly, you can
58build libpng for Netware or Beos as instructed in projects\netware.txt
59or projects\beos.
60
61Else enter the zlib directory and follow the instructions in zlib/README,
62then come back here and choose the appropriate makefile.sys in the scripts
63directory.
64
65The files that are presently available in the scripts directory
66include
67
68 makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
69 makefile.elf => Linux/ELF makefile symbol versioning,
70 gcc, creates libpng12.so.0.1.2.8)
71 makefile.linux => Linux/ELF makefile
72 (gcc, creates libpng12.so.0.1.2.8)
73 makefile.gcmmx => Linux/ELF makefile
74 (gcc, creates libpng12.so.0.1.2.8,
75 uses assembler code tuned for Intel MMX platform)
76 makefile.gcc => Generic makefile (gcc, creates static libpng.a)
77 makefile.knr => Archaic UNIX Makefile that converts files with
78 ansi2knr (Requires ansi2knr.c from
79 ftp://ftp.cs.wisc.edu/ghost)
80 makefile.aix => AIX/gcc makefile
81 makefile.cygwin => Cygwin/gcc makefile
82 makefile.darwin => Darwin makefile, can use on MacosX
83 makefile.dec => DEC Alpha UNIX makefile
84 makefile.freebsd => FreeBSD makefile
85 makefile.hpgcc => HPUX makefile using gcc
86 makefile.hpux => HPUX (10.20 and 11.00) makefile
87 makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64-bit
88 makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
89 makefile.intel => Intel C/C++ version 4.0 and later
90 libpng.icc => Project file for IBM VisualAge/C++ version 4.0 or later
91 makefile.netbsd => NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.
92 makefile.ne12bsd => NetBSD/cc makefile, uses PNGGCCRD,
93 makes libpng12.so
94 makefile.openbsd => OpenBSD makefile
95 makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
96 makefile.sggcc => Silicon Graphics (gcc,
97 creates libpng12.so.0.1.2.8)
98 makefile.sunos => Sun makefile
99 makefile.solaris => Solaris 2.X makefile (gcc,
100 creates libpng12.so.0.1.2.8)
101 makefile.so9 => Solaris 9 makefile (gcc,
102 creates libpng12.so.0.1.2.8)
103 makefile.32sunu => Sun Ultra 32-bit makefile
104 makefile.64sunu => Sun Ultra 64-bit makefile
105 makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
106 makefile.mips => MIPS makefile
107 makefile.acorn => Acorn makefile
108 makefile.amiga => Amiga makefile
109 smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
110 (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
111 makefile.atari => Atari makefile
112 makefile.beos => BEOS makefile for X86
113 makefile.bor => Borland makefile (uses bcc)
114 makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
115 makefile.tc3 => Turbo C 3.0 makefile
116 makefile.dj2 => DJGPP 2 makefile
117 makefile.msc => Microsoft C makefile
118 makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and later (uses
119 assembler code tuned for Intel MMX platform)
120 makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and later (does
121 not use assembler code)
122 makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
123 pngos2.def => OS/2 module definition file used by makefile.os2
124 makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
125 makevms.com => VMS build script
126 descrip.mms => VMS makefile for MMS or MMK
127 SCOPTIONS.ppc => Used with smakefile.ppc
128
129Copy the file (or files) that you need from the
130scripts directory into this directory, for example
131
132 MSDOS example: copy scripts\makefile.msc makefile
133 UNIX example: cp scripts/makefile.std makefile
134
135Read the makefile to see if you need to change any source or
136target directories to match your preferences.
137
138Then read pngconf.h to see if you want to make any configuration
139changes.
140
141Then just run "make" which will create the libpng library in
142this directory and "make test" which will run a quick test that reads
143the "pngtest.png" file and writes a "pngout.png" file that should be
144identical to it. Look for "9782 zero samples" in the output of the
145test. For more confidence, you can run another test by typing
146"pngtest pngnow.png" and looking for "289 zero samples" in the output.
147Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
148your output with the result shown in contrib/pngsuite/README.
149
150Most of the makefiles will allow you to run "make install" to
151put the library in its final resting place (if you want to
152do that, run "make install" in the zlib directory first if necessary).
153Some also allow you to run "make test-installed" after you have
154run "make install".
155
156If you encounter a compiler error message complaining about the
157lines
158 __png.h__ already includes setjmp.h;
159 __dont__ include it again.;
160This means you have compiled another module that includes setjmp.h,
161which is hazardous because the two modules might not include exactly
162the same setjmp.h. If you are sure that you know what you are doing
163and that they are exactly the same, then you can comment out or
164delete the two lines. Better yet, use the cexcept interface
165instead, as demonstrated in contrib/visupng of the libpng distribution.
166
167Further information can be found in the README and libpng.txt
168files, in the individual makefiles, in png.h, and the manual pages
169libpng.3 and png.5.
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