Installing libpng version 1.2.7beta2 - August 29, 2004 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-1.2.7beta2" or "lpng109" and "zlib-1.2.1" or "zlib121") 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 pngminus pngsuite visupng projects beos c5builder (Borland) visualc6 (msvc) netware.txt wince.txt scripts makefile.* 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 projects\visualc6 directory and follow the instructions in projects\visualc6\README.txt. You can build libpng for WindowsCE by downloading and installing the projects\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 or Beos as instructed in projects\netware.txt or projects\beos. 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.0.1.2.7beta2) makefile.gcmmx => Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.7beta2, 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, can use on MacosX makefile.dec => DEC Alpha UNIX makefile makefile.freebsd => 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.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.0.1.2.7beta2) makefile.sunos => Sun makefile makefile.solaris => Solaris 2.X makefile (gcc, creates libpng12.so.0.1.2.7beta2) makefile.so9 => Solaris 9 makefile (gcc, creates libpng12.so.0.1.2.7beta2) 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" which will create the libpng library in this directory and "make test" which will 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 contrib/pngsuite/*.png" 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". If you encounter a compiler error message complaining about the lines __png.h__ already includes setjmp.h; __dont__ include it again.; This means you have compiled another module that includes setjmp.h, which is hazardous because the two modules might not include exactly the same setjmp.h. If you are sure that you know what you are doing and that they are exactly the same, then you can comment out or delete the two lines. Better yet, use the cexcept interface instead, as demonstrated in contrib/visupng of the libpng distribution. Further information can be found in the README and libpng.txt files, in the individual makefiles, in png.h, and the manual pages libpng.3 and png.5.