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, or if you have a need to
  13 change configure.ac or Makefile.am, and you have a reasonably
  14 up-to-date set of tools, running ./autogen.sh in a git clone before
  15 running ./configure may fix the problem.  To be really sure that you
  16 aren't using any of the included pre-built scripts, you can do this:
  17
  18     ./configure --enable-maintainer-mode
  19     make maintainer-clean
  20     ./autogen.sh --maintainer --clean
  21     ./autogen.sh --maintainer
  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 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 If you wish to test with a particular zlib that is not first in the
  49 standard library search path, put ZLIBLIB, ZLIBINC, CPPFLAGS, LDFLAGS,
  50 and LD_LIBRARY_PATH in your environment before running "make test"
  51 or "make distcheck":
  52
  53 ZLIBLIB=/path/to/lib export ZLIBLIB
  54 ZLIBINC=/path/to/include export ZLIBINC
  55 CPPFLAGS="-I$ZLIBINC" export CPPFLAGS
  56 LDFLAGS="-L$ZLIBLIB" export LDFLAGS
  57 LD_LIBRARY_PATH="$ZLIBLIB:$LD_LIBRARY_PATH" export LD_LIBRARY_PATH
  58
  59 If you are using one of the makefile scripts, put ZLIBLIB and ZLIBINC
  60 in your environment and type "make ZLIBLIB=$ZLIBLIB ZLIBINC=$ZLIBINC test".
  61
  62 If you want to use "cmake" (see www.cmake.org), type
  63
  64    cmake . -DCMAKE_INSTALL_PREFIX=/path
  65    make
  66    make install
  67
  68 You can rename the directories that you downloaded (they
  69 might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.7"
  70 or "zlib127") so that you have directories called "zlib" and "libpng".
  71
  72 Your directory structure should look like this:
  73
  74    ..       (the parent directory)
  75       libpng  (this directory)
  76           INSTALL (this file)
  77           README
  78           *.h
  79           *.c
  80           CMakeLists.txt    =>  "cmake" script
  81           configuration files:
  82              configure.ac, configure, Makefile.am, Makefile.in,
  83              autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in,
  84              libpng-config.in, aclocal.m4, config.h.in, config.sub,
  85              depcomp, install-sh, mkinstalldirs, test-pngtest.sh
  86           contrib
  87              gregbook
  88              libtests
  89              pngminim
  90              pngminus
  91              pngsuite
  92              visupng
  93           projects
  94              visualc71
  95              vstudio
  96           scripts
  97              makefile.*
  98              *.def (module definition files)
  99              etc.
 100           pngtest.png
 101           etc.
 102       zlib
 103           README
 104           *.h
 105           *.c
 106           contrib
 107           etc.
 108
 109 If the line endings in the files look funny, you may wish to get the other
 110 distribution of libpng.  It is available in both tar.gz (UNIX style line
 111 endings) and zip (DOS style line endings) formats.
 112
 113 If you are building libpng with MSVC, you can enter the
 114 libpng projects\visualc6 or visualc71 directory and follow the instructions
 115 in README.txt.
 116
 117 Otherwise enter the zlib directory and follow the instructions in zlib/README,
 118 then come back here and run "configure" or choose the appropriate
 119 makefile.sys in the scripts directory.
 120
 121 Copy the file (or files) that you need from the
 122 scripts directory into this directory, for example
 123
 124    MSDOS example: copy scripts\makefile.msc makefile
 125    UNIX example:    cp scripts/makefile.std makefile
 126
 127 Read the makefile to see if you need to change any source or
 128 target directories to match your preferences.
 129
 130 Then read pnglibconf.dfa to see if you want to make any configuration
 131 changes.
 132
 133 Then just run "make" which will create the libpng library in
 134 this directory and "make test" which will run a quick test that reads
 135 the "pngtest.png" file and writes a "pngout.png" file that should be
 136 identical to it.  Look for "9782 zero samples" in the output of the
 137 test.  For more confidence, you can run another test by typing
 138 "pngtest pngnow.png" and looking for "289 zero samples" in the output.
 139 Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
 140 your output with the result shown in contrib/pngsuite/README.
 141
 142 Most of the makefiles will allow you to run "make install" to
 143 put the library in its final resting place (if you want to
 144 do that, run "make install" in the zlib directory first if necessary).
 145 Some also allow you to run "make test-installed" after you have
 146 run "make install".
 147
 148 Further information can be found in the README and libpng-manual.txt
 149 files, in the individual makefiles, in png.h, and the manual pages
 150 libpng.3 and png.5.
 151
 152 Using the ./configure script -- 16 December 2002.
 153 =================================================
 154
 155 The ./configure script should work compatibly with what scripts/makefile.*
 156 did, however there are some options you might need to add to configure
 157 explicitly, which previously was done semi-automatically (if you didn't edit
 158 scripts/makefile.* yourself, that is)
 159
 160 CFLAGS="-Wall -O -funroll-loops \
 161 -malign-loops=2 -malign-functions=2" ./configure --prefix=/usr/include \
 162 --with-pkgconfigdir=/usr/lib/pkgconfig --includedir=/usr/include
 163
 164 You can alternatively specify --includedir=/usr/include, /usr/local/include,
 165 /usr/include/libpng%NN%, or whatever.
 166
 167 If you find that the configure script is out-of-date or is not supporting
 168 your platform properly, try running autogen.sh to regenerate "configure",
 169 "Makefile.in", and the other configuration files. Then try configure again.
 170