Installing libpng version 1.2.5 - October 3, 2002

Before installing libpng, you must first install zlib.  zlib

can usually be found wherever you got libpng.  zlib can be

placed in another directory, at the same level as libpng.

Note that your system might already have a preinstalled

zlib, but you will still need to have access to the

zlib.h and zconf.h include files that correspond to the

version of zlib that's installed.

You can rename the directories that you downloaded (they

might be called "libpng-1.2.5" or "lpng109" and "zlib-1.1.4"

or "zlib114") so that you have directories called "zlib" and "libpng".

Your directory structure should look like this:

   ..       (the parent directory)

      libpng  (this directory)

          INSTALL (this file)

          README

          *.h

          *.c

          contrib

             gregbook

             msvctest

             pngminus

             pngsuite

             visupng

          projects

             beos

             borland

             msvc

             netware.txt

             wince.txt

          scripts

             makefile.*

             libpng*.in

          pngtest.png

          etc.

      zlib

          README

          *.h

          *.c

          contrib

          etc.

If the line endings in the files look funny, you may wish to get the other

distribution of libpng.  It is available in both tar.gz (UNIX style line

endings) and zip (DOS style line endings) formats.

If you are building libpng with MSVC, you can enter the libpng\msvc directory

and follow the instructions in msvc\README.txt.

You can build libpng for WindowsCE by entering the downloading and installing

the libpng\wince directory as instructed in the projects\wince.txt file, and

then following the instructions in the README* files.  Similarly, you can

build libpng for Netware as instructed in projects\netware.txt.

Else enter the zlib directory and follow the instructions in zlib/README,

then come back here and choose the appropriate makefile.sys in the scripts

directory.

The files that are presently available in the scripts directory

include

 makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)

 makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.5)

 makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.5,

                       uses assembler code tuned for Intel MMX platform)

 makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)

 makefile.knr      =>  Archaic UNIX Makefile that converts files with

                       ansi2knr (Requires ansi2knr.c from

                       ftp://ftp.cs.wisc.edu/ghost)

 makefile.aix      =>  AIX/gcc makefile

 makefile.cygwin   =>  Cygwin/gcc makefile

 makefile.darwin   =>  Darwin makefile

 makefile.dec      =>  DEC Alpha UNIX makefile

 makefile.hpgcc    =>  FreeBSD makefile

 makefile.hpgcc    =>  HPUX makefile using gcc

 makefile.hpux     =>  HPUX (10.20 and 11.00) makefile

 makefile.ibmc     =>  IBM C/C++ version 3.x for Win32 and OS/2 (static)

 makefile.intel    =>  Intel C/C++ version 4.0 and later

 libpng.icc        =>  Project file for IBM VisualAge/C++ version 4.0 or later

 makefile.macosx   =>  MACOS X Makefile

 makefile.netbsd   =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.

 makefile.ne0bsd  =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng0.so

 makefile.openbsd  =>  OpenBSD makefile

 makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)

 makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng12.so.0.1.2.5)

 makefile.sunos    =>  Sun makefile

 makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng12.so.0.1.2.5)

 makefile.so9      =>  Solaris 9 makefile (gcc, creates libpng12.so.0.1.2.5)

 makefile.32sunu   =>  Sun Ultra 32-bit makefile

 makefile.64sunu   =>  Sun Ultra 64-bit makefile

 makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc

 makefile.mips     =>  MIPS makefile

 makefile.acorn    =>  Acorn makefile

 makefile.amiga    =>  Amiga makefile

 smakefile.ppc     =>  AMIGA smakefile for SAS C V6.58/7.00 PPC compiler

                       (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)

 makefile.atari    =>  Atari makefile

 makefile.beos     =>  BEOS makefile for X86

 makefile.bor      =>  Borland makefile (uses bcc)

 makefile.bc32     =>  32-bit Borland C++ (all modules compiled in C mode)

 makefile.bd32     =>  To make a png32bd.dll with Borland C++ 4.5

 makefile.tc3      =>  Turbo C 3.0 makefile

 makefile.dj2      =>  DJGPP 2 makefile

 makefile.msc      =>  Microsoft C makefile

 makefile.vcawin32 =>  makefile for Microsoft Visual C++ 5.0 and later (uses

                       assembler code tuned for Intel MMX platform)

 makefile.vcwin32  =>  makefile for Microsoft Visual C++ 4.0 and later (does

                       not use assembler code)

 makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)

 pngos2.def        =>  OS/2 module definition file used by makefile.os2

 makefile.watcom   =>  Watcom 10a+ Makefile, 32-bit flat memory model

 makevms.com       =>  VMS build script

 descrip.mms       =>  VMS makefile for MMS or MMK

 pngdef.pas        =>  Defines for a png32bd.dll with Borland C++ 4.5

 SCOPTIONS.ppc     =>  Used with smakefile.ppc

Copy the file (or files) that you need from the

scripts directory into this directory, for example

   MSDOS example: copy scripts\makefile.msc makefile

   UNIX example:    cp scripts/makefile.std makefile

Read the makefile to see if you need to change any source or

target directories to match your preferences.

Then read pngconf.h to see if you want to make any configuration

changes.

Then just run "make test" which will create the libpng library in

this directory and run a quick test that reads the "pngtest.png"

file and writes a "pngout.png" file that should be identical to it.

Look for "9782 zero samples" in the output of the test.  For more

confidence, you can run another test by typing "pngtest pngnow.png"

and looking for "289 zero samples" in the output.  Also, you can

run "pngtest -m *.png" in the "contrib/pngsuite" directory and compare

your output with the result shown in contrib/pngsuite/README.

Most of the makefiles will allow you to run "make install" to

put the library in its final resting place (if you want to

do that, run "make install" in the zlib directory first if necessary).

Some also allow you to run "make test-installed" after you have

run "make install".

Further information can be found in the README and libpng.txt

files, in the individual makefiles, in png.h, in the README files in

subdirectories of the LIB directory, and the manual pages libpng.3 and png.5.