Installing libpng version 1.0.2a - December 29, 1998 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-1.0.2a" or "lpng103" and "zlib-1.1.3" or "zlib113") 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 scripts makefile.* pngtest.png etc. zlib README *.h *.c contrib etc. First 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 descrip.mms => VMS makefile for MMS or MMK makefile.std => Generic UNIX makefile makefile.knr => Archaic UNIX Makefile that converts files with ansi2knr makefile.dec => DEC Alpha UNIX makefile makefile.sgi => Silicon Graphics IRIX makefile makefile.sun => Sun makefile makefile.s2x => Solaris 2.X makefile (gcc, creates libpng.so.2.1.0) makefile.lnx => Linux/ELF makefile (gcc, creates libpng.so.2.1.0) makefile.mip => MIPS makefile makefile.aco => Acorn makefile makefile.ama => Amiga makefile smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc) makefile.atr => Atari makefile makefile.bor => Borland makefile build.bat => MS-DOS batch file for Borland compiler makefile.dj2 => DJGPP 2 makefile makefile.msc => Microsoft C makefile makefile.w32 => makefile for Microsoft Visual C++ 4.0 and later makefile.tc3 => Turbo C 3.0 makefile makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def) pngos2.def => OS/2 module definition file used by makefile.os2 makefile.wat => Watcom 10a+ Makefile, 32-bit flat memory model makevms.com => VMS build script pngdll.mak => To make a png32bd.dll with Borland C++ 4.5 pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5 Copy the file (or files) that you need from the scripts directory into this directory, for example MSDOS example: copy scripts\makefile.msd 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. 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). Further information can be found in the README and libpng.txt files, in the individual makefiles, and in png.h, and the manual pages libpng.3 and png.5.