src/png/INSTALL

   1
   2 Installing libpng
   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.  To be really sure that you aren't using any of the included
  17 pre-built scripts, you can do this:
  18
  19     ./configure --enable-maintainer-mode
  20     make maintainer-clean
  21     ./autogen.sh
  22     ./configure [--prefix=/path] [other options]
  23     make
  24     make install
  25     make check
  26
  27 Instead, you can use one of the custom-built makefiles in the
  28 "scripts" directory
  29
  30     cp scripts/makefile.system makefile
  31     make test
  32     make install
  33
  34 The files that are presently available in the scripts directory
  35 are listed and described in scripts/README.txt.
  36
  37 Or you can use one of the "projects" in the "projects" directory.
  38
  39 Before installing libpng, you must first install zlib, if it
  40 is not already on your system.  zlib can usually be found
  41 wherever you got libpng.  zlib can be placed in another directory,
  42 at the same level as libpng.
  43
  44 If you want to use "cmake" (see www.cmake.org), type
  45
  46    cmake . -DCMAKE_INSTALL_PREFIX=/path
  47    make
  48    make install
  49
  50 If your system already has a preinstalled zlib you will still need
  51 to have access to the zlib.h and zconf.h include files that
  52 correspond to the version of zlib that's installed.
  53
  54 You can rename the directories that you downloaded (they
  55 might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.5"
  56 or "zlib125") so that you have directories called "zlib" and "libpng".
  57
  58 Your directory structure should look like this:
  59
  60    ..       (the parent directory)
  61       libpng  (this directory)
  62           INSTALL (this file)
  63           README
  64           *.h
  65           *.c
  66           CMakeLists.txt    =>  "cmake" script
  67           configuration files:
  68              configure.ac, configure, Makefile.am, Makefile.in,
  69              autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in,
  70              libpng-config.in, aclocal.m4, config.h.in, config.sub,
  71              depcomp, install-sh, mkinstalldirs, test-pngtest.sh
  72           contrib
  73              gregbook
  74              pngminim
  75              pngminus
  76              pngsuite
  77              visupng
  78           projects
  79              visualc71
  80              vstudio
  81           scripts
  82              makefile.*
  83              *.def (module definition files)
  84              etc.
  85           pngtest.png
  86           etc.
  87       zlib
  88           README
  89           *.h
  90           *.c
  91           contrib
  92           etc.
  93
  94 If the line endings in the files look funny, you may wish to get the other
  95 distribution of libpng.  It is available in both tar.gz (UNIX style line
  96 endings) and zip (DOS style line endings) formats.
  97
  98 If you are building libpng with MSVC, you can enter the
  99 libpng projects\visualc6 or visualc71 directory and follow the instructions
 100 in README.txt.
 101
 102 Otherwise enter the zlib directory and follow the instructions in zlib/README,
 103 then come back here and run "configure" or choose the appropriate
 104 makefile.sys in the scripts directory.
 105
 106 Copy the file (or files) that you need from the
 107 scripts directory into this directory, for example
 108
 109    MSDOS example: copy scripts\makefile.msc makefile
 110    UNIX example:    cp scripts/makefile.std makefile
 111
 112 Read the makefile to see if you need to change any source or
 113 target directories to match your preferences.
 114
 115 Then read pnglibconf.dfa to see if you want to make any configuration
 116 changes.
 117
 118 Then just run "make" which will create the libpng library in
 119 this directory and "make test" which will run a quick test that reads
 120 the "pngtest.png" file and writes a "pngout.png" file that should be
 121 identical to it.  Look for "9782 zero samples" in the output of the
 122 test.  For more confidence, you can run another test by typing
 123 "pngtest pngnow.png" and looking for "289 zero samples" in the output.
 124 Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
 125 your output with the result shown in contrib/pngsuite/README.
 126
 127 Most of the makefiles will allow you to run "make install" to
 128 put the library in its final resting place (if you want to
 129 do that, run "make install" in the zlib directory first if necessary).
 130 Some also allow you to run "make test-installed" after you have
 131 run "make install".
 132
 133 Further information can be found in the README and libpng-manual.txt
 134 files, in the individual makefiles, in png.h, and the manual pages
 135 libpng.3 and png.5.