src/png/INSTALL

   1
   2 Installing libpng version 1.4.4 - September 23, 2010
   3
   4 On Unix/Linux and similar systems, you can simply type
   5
   6     ./configure [--prefix=/path]
   7     make check
   8     make install
   9
  10 and ignore the rest of this document.
  11
  12 If configure does not work on your system and you have a reasonably
  13 up-to-date set of tools, running ./autogen.sh before running ./configure
  14 may fix the problem.  You can also run the individual commands in
  15 autogen.sh with the --force option, if supported by your version of
  16 the tools.  If you run 'libtoolize --force', though, this will replace
  17 the distributed, patched, version of ltmain.sh with an unpatched version
  18 and your shared library builds may fail to produce libraries with the
  19 correct version numbers.
  20
  21 Instead, you can use one of the custom-built makefiles in the
  22 "scripts" directory
  23
  24     cp scripts/makefile.system makefile
  25     make test
  26     make install
  27
  28 The files that are presently available in the scripts directory
  29 are listed and described in scripts/README.txt.
  30
  31 Or you can use one of the "projects" in the "projects" directory.
  32
  33 Before installing libpng, you must first install zlib, if it
  34 is not already on your system.  zlib can usually be found
  35 wherever you got libpng.  zlib can be placed in another directory,
  36 at the same level as libpng.
  37
  38 If you want to use "cmake" (see www.cmake.org), type
  39
  40    cmake . -DCMAKE_INSTALL_PREFIX=/path
  41    make
  42    make install
  43
  44 If your system already has a preinstalled zlib you will still need
  45 to have access to the zlib.h and zconf.h include files that
  46 correspond to the version of zlib that's installed.
  47
  48 You can rename the directories that you downloaded (they
  49 might be called "libpng-1.4.4" or "libpng14" and "zlib-1.2.3"
  50 or "zlib123") so that you have directories called "zlib" and "libpng".
  51
  52 Your directory structure should look like this:
  53
  54    ..       (the parent directory)
  55       libpng  (this directory)
  56           INSTALL (this file)
  57           README
  58           *.h
  59           *.c
  60           CMakeLists.txt    =>  "cmake" script
  61           configuration files:
  62              configure.ac, configure, Makefile.am, Makefile.in,
  63              autogen.sh, config.guess, ltmain.sh, missing,
  64              aclocal.m4, config.h.in, config.sub,
  65              depcomp, install-sh, test-pngtest.sh
  66           contrib
  67              gregbook
  68              pngminim
  69              pngminus
  70              pngsuite
  71              visupng
  72           projects
  73              cbuilder5 (Borland)
  74              visualc6 (msvc)
  75              visualc71
  76              vstudio
  77              xcode
  78           scripts
  79              makefile.*
  80              *.def (module definition files)
  81           pngtest.png
  82           etc.
  83       zlib
  84           README
  85           *.h
  86           *.c
  87           contrib
  88           etc.
  89
  90 If the line endings in the files look funny, you may wish to get the other
  91 distribution of libpng.  It is available in both tar.gz (UNIX style line
  92 endings) and zip (DOS style line endings) formats.
  93
  94 If you are building libpng with MSVC, you can enter the
  95 libpng projects\visualc6 or visualc71 directory and follow the instructions
  96 in README.txt.
  97
  98 Otherwise enter the zlib directory and follow the instructions in zlib/README,
  99 then come back here and run "configure" or choose the appropriate
 100 makefile.sys in the scripts directory.
 101
 102 Copy the file (or files) that you need from the
 103 scripts directory into this directory, for example
 104
 105    MSDOS example: copy scripts\makefile.msc makefile
 106    UNIX example:    cp scripts/makefile.std makefile
 107
 108 Read the makefile to see if you need to change any source or
 109 target directories to match your preferences.
 110
 111 Then read pngconf.h to see if you want to make any configuration
 112 changes.
 113
 114 Then just run "make" which will create the libpng library in
 115 this directory and "make test" which will run a quick test that reads
 116 the "pngtest.png" file and writes a "pngout.png" file that should be
 117 identical to it.  Look for "9782 zero samples" in the output of the
 118 test.  For more confidence, you can run another test by typing
 119 "pngtest pngnow.png" and looking for "289 zero samples" in the output.
 120 Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
 121 your output with the result shown in contrib/pngsuite/README.
 122
 123 Most of the makefiles will allow you to run "make install" to
 124 put the library in its final resting place (if you want to
 125 do that, run "make install" in the zlib directory first if necessary).
 126 Some also allow you to run "make test-installed" after you have
 127 run "make install".
 128
 129 If you encounter a compiler error message complaining about the
 130 lines
 131
 132       __png.h__ already includes setjmp.h;
 133       __dont__ include it again.;
 134
 135 this means you have compiled another module that includes setjmp.h,
 136 which is hazardous because the two modules might not include exactly
 137 the same setjmp.h.  If you are sure that you know what you are doing
 138 and that they are exactly the same, then you can comment out or
 139 delete the two lines.  Better yet, use the cexcept interface
 140 instead, as demonstrated in contrib/visupng of the libpng distribution.
 141
 142 Further information can be found in the README and libpng.txt
 143 files, in the individual makefiles, in png.h, and the manual pages
 144 libpng.3 and png.5.