
UNIX/Cygwin/MinGW COMPILATION

  Note:

    Platform specific notes regarding specific operating systems may
    be found in the PLATFORMS.txt file.  This file (README.txt) provides
    generic instructions which work in most common cases.  Additional
    notes regarding Cygwin & MinGW are provided later in this file.

  Type:

    gzip -dc GraphicsMagick-1.1.tar.gz | tar xvf -
    cd GraphicsMagick-1.1

  If you do not have gzip(1), the source for the gzip package is
  available as a shell archive at

    ftp://ftp.gnu.org/gnu/gzip/gzip-1.2.4a.shar

  or as a tar archive at

    ftp://ftp.gnu.org/gnu/gzip/gzip-1.2.4a.tar

  Use 'configure' to automatically configure, build, and install
  GraphicsMagick. The configure script may be executed from the
  GraphicsMagick source directory (e.g ./configure) or from a seperate
  build directory by specifying the full path to configure (e.g.
  /src/GraphicsMagick-1.1/configure). The advantage of using a seperate
  build directory is that multiple GraphicsMagick builds may share the
  same GraphicsMagick source directory while allowing each build to use a
  unique set of options.

  If you are willing to accept configure's default options, and build from
  within the source directory, type:

      ./configure

  and watch the configure script output to verify that it finds everything
  that you think it should. If it does not, then adjust your environment
  so that it does.

  By default, `make install' will install the package's files
  in `/usr/local/bin', `/usr/local/man', etc. You can specify an
  installation prefix other than `/usr/local' by giving `configure'
  the option `--prefix=PATH'.  This is valuable in case you don't have
  privileges to install under the default paths or if you want to install
  in the system directories instead.

  If you are not happy with configure's choice of compiler, compilation
  flags, or libraries, you can give `configure' initial values for
  variables by specifying them on the configure command line, e.g.:

      ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix

  Options which should be common to packages installed under the same
  directory heirarchy may be supplied via a 'config.site' file located
  under the installation prefix via the path ${prefix}/share/config.site
  where ${prefix} is the installation prefix.  This file is used for all
  packages installed under that prefix.  This is an example config.site
  file:

  # Configuration values for all packages installed under this prefix
  CC=gcc
  CXX=c++
  CPPFLAGS='-I/usr/local/include'
  LDFLAGS='-L/usr/local/lib -R/usr/local/lib'

  When the 'config.site' file is being used to supply configuration
  options, configure will issue a message similar to:

    configure: loading site script /usr/local/share/config.site

  The configure variables you should be aware of are:

      CC          Name of C compiler (e.g. 'cc -Xa') to use
      CXX         Name of C++ compiler to use (e.g. 'CC')
      CFLAGS      Compiler flags (e.g. '-g -O2') to compile C code
      CXXFLAGS    Compiler flags (e.g. '-g -O2') to compile C++ code
      CPPFLAGS    Include paths (-I/somedir) to look for header files
      LDFLAGS     Library paths (-L/somedir) to look for libraries
                  Systems that support the notion of a library run-path
                  may require an additional argument in order to find
                  shared libraries at run time. For example, the Solaris
                  linker requires an argument of the form '-R/somedir',
                  some Linux systems will work with '-rpath /somedir',
                  while some other Linux systems who's gcc does not pass
                  -rpath to the linker require an argument of the form
                  '-Wl,-rpath,/somedir'.
      LIBS        Extra libraries (-lsomelib) required to link

  Any variable (e.g. CPPFLAGS or LDFLAGS) which requires a directory
  path must specify an absolute path rather than a relative path.

  Configure can usually find the X include and library files
  automatically, but if it doesn't, you can use the `configure' options
  `--x-includes=DIR' and `--x-libraries=DIR' to specify their locations.

  The configure script provides a number of GraphicsMagick specific
  options.  When disabling an option --disable-something is equivalent to
  specifying --enable-something=no and --without-something is equivalent
  to --with-something=no.  The configure options are as
  follows (execute 'configure --help' to see all options).

  Optional Features:
   --enable-ccmalloc       enable 'ccmalloc' memory debug support (default disabled)
   --enable-prof           enable 'prof' profiling support (default disabled)
   --enable-gprof          enable 'gprof' profiling support (default disabled)
   --enable-gcov           enable 'gcov' profiling support (default disabled)
   --disable-installed     disable building an installed GraphicsMagick
                           (default enabled)
   --disable-largefile     disable support for large (64 bit) file offsets
   --disable-lzw           disable LZW support (default enabled)
   --enable-symbol-prefix  enable prefixing library symbols with "Gm"
   --enable-magick-compat  install ImageMagick utility shortcuts (default disabled)

  Optional Packages/Options:
   --with-quantum-depth    number of bits in a pixel quantum (default 8)
   --with-modules          enable support for dynamically loadable modules
   --with-cache            set pixel cache threshhold (defaults to available memory)
   --without-threads       disable threads support
   --with-frozenpaths      enable frozen delegate paths
   --without-magick-plus-plus disable build/install of Magick++
   --without-perl          disable build/install of PerlMagick
        or
   --with-perl=PERL        use specified Perl binary to configure PerlMagick
   --with-perl-options=OPTIONS  options to pass on command-line when
                           generating PerlMagick's Makefile from Makefile.PL
   --without-bzlib         disable BZLIB support
   --without-dps           disable Display Postscript support
   --without-fpx           disable FlashPIX support
   --with-gslib            enable Ghostscript library support
   --without-jbig          disable JBIG support
   --without-jpeg          disable JPEG support
   --without-jp2           disable JPEG v2 support
   --without-lcms          disable LCMS support
   --without-png           disable PNG support
   --without-tiff          disable TIFF support
   --without-trio          disable TRIO library support
   --without-ttf           disable TrueType support
   --without-wmf           disable WMF support
   --with-fontpath         prepend to default font search path
   --with-gs-font-dir      directory containing Ghostscript fonts
   --with-windows-font-dir directory containing MS-Windows fonts
   --without-xml           disable XML support
   --without-zlib          disable ZLIB support
   --with-x                use the X Window System
   --with-share-path=DIR   Alternate path to share directory
                           (default share/GraphicsMagick)
   --with-libstdc=DIR      use libstdc++ in DIR (for GNU C++)

  GraphicsMagick options represent either features to be enabled, disabled,
  or packages to be included in the build.  When a feature is enabled (via
  --enable-something), it enables code already present in GraphicsMagick.
  When a package is enabled (via --with-something), the configure script
  will search for it, and if is is properly installed and ready to use
  (headers and built libraries are found by compiler) it will be included
  in the build.  The configure script is delivered with all features
  disabled and all packages enabled. In general, the only reason to
  disable a package is if a package exists but it is unsuitable for
  the build (perhaps an old version or not compiled with the right
  compilation flags).

  Several configure options require special note:

    o --enable-shared: the shared libraries are built and support for
      loading coder and process modules is enabled. Shared libraries are
      preferred because they allow programs to share common code, making
      the individual programs much smaller. In addition shared libraries
      are required in order for PerlMagick to be dynamically loaded by an
      installed PERL (otherwise an additional PERL (PerlMagick) must be
      installed. This option is not the default because all libraries used
      by GraphicsMagick must also be dynamic libraries if GraphicsMagick
      itself is to be dynamically loaded (such as for PerlMagick).

      GraphicsMagick built with delegates (see MAGICK PLUG-INS below)
      can pose additional challenges. If GraphicsMagick is built using
      static libraries (the default without --enable-shared) then
      delegate libraries may be built as either static libraries or
      shared libraries. However, if GraphicsMagick is built using shared
      libraries, then all delegate libraries must also be built as
      shared libraries.  Static libraries usually have the extension .a,
      while shared libraries typically have extensions like .so, .sa,
      or .dll. Code in shared libraries normally must compiled using
      a special compiler option to produce Position Independent Code
      (PIC). The only time this is not necessary is if the platform
      compiles code as PIC by default.

      PIC compilation flags differ from vendor to vendor (gcc's is
      -fPIC). However, you must compile all shared library source with
      the same flag (for gcc use -fPIC rather than -fpic). While static
      libraries are normally created using an archive tool like 'ar',
      shared libraries are built using special linker or compiler options
      (e.g. -shared for gcc).

      Building shared libraries often requires subtantial hand-editing
      of Makefiles and is only recommended for those who know what they
      are doing.

      If --enable-shared is not specified, a new PERL interpreter
      (PerlMagick) is built which is statically linked against the
      PerlMagick extension. This new interpreter is installed into the
      same directory as the GraphicsMagick utilities. If --enable-shared
      is specified, the PerlMagick extension is built as a dynamically
      loadable object which is loaded into your current PERL interpreter
      at run-time. Use of dynamically-loaded extensions is preferable over
      statically linked extensions so --enable-shared should be specified
      if possible (note that all libraries used with GraphicsMagick must
      be shared libraries!).

    o --disable-static: static archive libraries (with extension .a)
      are not built.  If you are building shared libraries, there
      is little value to building static libraries. Reasons to build
      static libraries include: 1) they can be easier to debug; 2) the
      clients do not have external dependencies (i.e. libMagick.so); 3)
      building PIC versions of the delegate libraries may take additional
      expertise and effort; 4) you are unable to build shared libraries.

    o --disable-installed: By default the GraphicsMagick build is
      configured to formally install into a directory tree. This is the
      most secure and reliable way to install GraphicsMagick. Specifying
      --disable-installed configures GraphicsMagick so that it doesn't use
      hard-coded paths and locates support files by computing an offset
      path from the executable (or from the location specified by the
      MAGICK_HOME environment variable. The uninstalled configuration is
      ideal for binary distributions which are expected to extract and run
      in any location.

    o --with-modules: image coders and process modules are built as
      loadable modules which are installed under the directory
      [prefix]/lib/GraphicsMagick-X.X.X/modules-QN (where 'N' equals 8, 16,
      or 32 depending on the quantum depth) in the subdirectories 'coders'
      and 'filters' respectively. The modules build option is only
      available in conjunction with --enable-shared. If --enable-shared is
      not also specified, then support for building modules is disabled.
      Note that if --enable-shared is specified, the module loader is
      active (allowing extending an installed GraphicsMagick by simply
      copying a module into place) but GraphicsMagick itself is not built
      using modules.

    o --disable-lzw: Until July 7, 2004, Unisys held a patent on the LZW
      algorithm so LZW was disabled by default. Support for LZW is now
      enabled by default. Use this option if you need to disable it.

    o --enable-symbol-prefix: The GraphicsMagick libraries may contain
      symbols which conflict with other libraries.  Specifify this option
      to prefix "Gm" to all library symbols, and use the C pre-processor
      to allow dependent code to still compile as before.

    o --enable-magick-compat: Normally GraphicsMagick installs only the
      'gm' utility from which all commands may be accessed. Existing
      packages may be designed to invoke ImageMagick utilities (e.g.
      "convert"). Specify this option to install ImageMagick utility
      compatibility links to allow GraphicsMagick to substitute directly
      for ImageMagick. Take care when selecting this option since if
      there is an existing ImageMagick installation installed in the same
      directory, its utilities will be replaced when GraphicsMagick is
      installed.

    o --with-quantum-depth: This option allows the user to specify the
      number of bits to use per pixel quantum (the size of the red,
      green, blue, and alpha pixel components. For example,
      "--with-quantum-depth=8" builds GraphicsMagick using 8-bit quantums.
      Most computer display adaptors use 8-bit quantums. Currently
      supported arguments are 8, 16, or 32. The default is 8. This
      option is the most important option in determining the overall
      run-time performance of GraphicsMagick.

      The number of bits in a quantum determines how many values it may
      contain. Each quantum level supports 256 times as many values as
      the previous level. The following table shows the range available
      for various quantum sizes.

          QuantumDepth  Valid Range (Decimal)  Valid Range (Hex)
                8            0-255                   00-FF
               16           0-65535                0000-FFFF
               32         0-4294967295         00000000-FFFFFFFF

      Larger pixel quantums cause GraphicsMagick to run more slowly and to
      require more memory. For example, using sixteen-bit pixel quantums
      causes GraphicsMagick to run 15% to 50% slower (and take twice as
      much memory) than when it is built to support eight-bit pixel
      quantums.

      The amount of virtual memory consumed by an image can be computed
      by the equation (QuantumDepth*Rows*Columns*5)/8. This is an
      important consideration when resources are limited, particularly
      since processing an image may require several images to be in
      memory at one time. The following table shows memory consumption
      values for a 1024x768 image:

          QuantumDepth  Virtual Memory
              8              3MB
             16              8MB
             32             15MB

    o --without-magick-plus-plus: Disable building Magick++, the C++
      application programming interface to GraphicsMagick. A suitable C++
      compiler is required in order to build Magick++. Specify the CXX
      configure variable to select the C++ compiler to use (default
      "g++"), and CXXFLAGS to select the desired compiler opimization
      and debug flags (default "-g -O2"). Antique C++ compilers will
      normally be rejected by configure tests so specifying this option
      should only be necessary if Magick++ fails to compile.

    o --with-frozenpaths: Normally external program names are substituted
      into the delegates.mgk file without full paths. Specify this option
      to enable saving full paths to programs using locations determined
      by configure. This is useful for environments where programs are
      stored under multiple paths, and users may use different PATH
      settings than the person who builds GraphicsMagick.

    o --without-threads: By default, the GraphicsMagick library is compiled
      with multi-thread support.  If this is undesireable, then specify
      --without-threads.

    o --with-cache: Specify a different image pixel cache threshold
      using the --with-cache option. This sets the maximum amount of
      heap memory that GraphicsMagick is allowed to consume before
      switching to using memory-mapped temporary files to store raw
      pixel data.

    o --disable-largefile: By default, GraphicsMagick is compiled with
      support for large (> 2GB on a 32-bit CPU) files if the operating
      system supports large files.  All applications which use the
      GraphicsMagick library must then also include support for large
      files. By disabling support for large files via --disable-largefile,
      dependent applications do not require special compilation options
      for large files in order to use the library.

    o --without-perl: By default, PerlMagick is conveniently compiled
      and installed as part of GraphicsMagick's normal "configure", "make",
      "make install" process.. When --without-perl is specified, you must
      first install GraphicsMagick, change to the PerlMagick subdirectory,
      build, and finally install PerlMagick. Note, PerlMagick is
      configured even if --without-perl is specified. If the argument
      --with-perl=/path/to/perl is supplied, then /path/to/perl will be
      taken as the PERL interpreter to use. This is important in case the
      'perl' executable in your PATH is not PERL5, or is not the PERL
      you want to use.

    o --with-perl-options: The PerlMagick module is normally installed
      using the Perl interpreter's installation PREFIX, rather than
      GraphicsMagick's. If GraphicsMagick's installation prefix is not
      the same as PERL's PREFIX, then you may find that PerlMagick's
      'make install' step tries to install into a directory tree that
      you don't have write permissions to. This is common when PERL is
      delivered with the operating system or on Internet Service Provider
      (ISP) web servers. If you want PerlMagick to install elsewhere,
      then provide a PREFIX option to PERL's configuration step via
      "--with-perl-options=PREFIX=/some/place". Other options accepted by
      MakeMaker are 'LIB', 'LIBPERL_A', 'LINKTYPE', and 'OPTIMIZE'. See
      the ExtUtils::MakeMaker(3) manual page for more information on
      configuring PERL extensions.

    o --without-x: By default, GraphicsMagick will use X11 libraries if
      they are available. When --without-x is specified, use of X11 is
      disabled. The display, animate, and import sub-commands are not
      included. The remaining sub-commands have reduced functionality
      such as no access to X11 fonts (consider using Postscript or
      TrueType fonts instead).

    o --with-gs-font-dir: Specify the directory containing the
      Ghostscript Postscript Type 1 font files (e.g. "n022003l.pfb") so
      that they can be rendered using the FreeType library. If the font
      files are installed using the default Ghostscript installation paths
      (${prefix}/share/ghostscript/fonts), they should be discovered
      automatically by configure and specifying this option is not
      necessary. Specify this option if the Ghostscript fonts fail to
      be located automatically, or the location needs to be overridden.

    o --with-windows-font-dir: Specify the directory containing
      MS-Windows-compatible fonts. This is not necessary when GraphicsMagick
      is running under MS-Windows.

  Building under Cygwin

    GraphicsMagick may be built under the Windows '95-XP Cygwin
    Unix-emulation environment available for free from

      http://www.cygwin.com/

    X11R6 for Cygwin is available from

      http://xfree86.cygwin.com/

    It is strongly recommended that the X11R6 package be installed since
    this enables GraphicsMagick's X11 support (animate, display, and
    import sub-commands will work) and it includes the Freetype v2 DLL
    required to support TrueType and Postscript Type 1 fonts. Make sure
    that /usr/X11R6/bin is in your PATH prior to running configure.

    If you are using Cygwin version 1.3.9 or later, you may specify the
    configure option '--enable-shared' to build Cygwin DLLs. Specifying
    '--enable-shared' is required if you want to build PerlMagick under
    Cygwin because Cygwin does not provide the libperl.a static library
    required to create a static PerlMagick. Note that since C++
    exceptions do not currently work properly when thrown from a DLL, the
    Magick++ library is always built as a static library. Be sure to not
    specify --disable-static if you are building the Magick++ library since
    that would surely lead to problems.

  Building under MinGW & MSYS

    GraphicsMagick may be built using the free MinGW ("Minimalistic GNU for
    Windows") package, available from

      http://www.mingw.org/

    which consists of a GNU-based (GCC) compilation toolset plus headers
    and libraries required to build programs which are entirely based on
    standard Microsoft Windows DLLs so that they may be used for
    proprietary applications. MSYS provides a Unix-style console shell
    window with sufficient functionality to run the GraphicsMagick
    configure script and execute `make', `make check', and `make
    install'. GraphicsMagick may be executed from the MSYS shell, but
    since it is a normal Windows application, it will work just as well
    from the Windows command line.

    Unlike the Cygwin build which creates programs based on a
    Unix-emulation DLL, and which uses Unix-style paths to access Windows
    files, the MinGW build creates native Windows console applications
    similar to the Visual C++ build. Run-time performance is similar to
    the Microsoft compilers.

    The base MinGW package and the MSYS package should be installed.
    Other MinGW packages are entirely optional. Once MSYS is installed a
    MSYS icon (blue capital 'M') is added to the desktop. Double clicking
    on this icon starts an instance of the MSYS shell.

    Start the MSYS console and follow the Unix configure and build
    instructions. The configure and build for MinGW is the same as for
    Unix. Any additional delegate libraries (e.g. libpng) will need to be
    built under MinGW in order to be used. These libraries should be
    built and installed prior to configuring GraphicsMagick. While some
    delegate libraries are easy to configure and build under MinGW,
    others may be quite a challenge.

    Since C++ exceptions do not currently work properly when thrown from
    a DLL, the Magick++ library is always built as a static library. Be
    sure to not specify --disable-static if you are building the Magick++
    library since that would surely lead to problems.

    Note that the default installation prefix is MSYS's notion of
    "/usr/local" which installs the package into a MSYS directory. To
    install outside of the MSYS directory tree, you may specify an
    installation prefix like "/c/GraphicsMagick" which causes the package
    to be installed under the Windows directory "C:\GraphicsMagick". The
    installation directory structure will look very much like the Unix
    installation layout (e.g. "C:\GraphicsMagick\bin",
    "C:\GraphicsMagick\lib", "C:\GraphicsMagick\share", etc.). Paths
    which may be embedded in libraries and configuration files are
    transformed into Windows paths so they don't depend on MSYS.

  Dealing with configuration failures:

    While configure is designed to ease installation of GraphicsMagick, it
    often discovers problems that would otherwise be encountered later
    when compiling GraphicsMagick. The configure script tests for headers
    and libraries by executing the compiler (CC) with the specified
    compilation flags (CFLAGS), pre-processor flags (CPPFLAGS), and linker
    flags (LDFLAGS). Any errors are logged to the file 'config.log'. If
    configure fails to discover a header or library please review this
    log file to determine why, however, please be aware that *errors
    in the config.log are normal* because configure works by trying
    something and seeing if it fails. An error in config.log is only a
    problem if the test should have passed on your system. After taking
    corrective action, be sure to remove the 'config.cache' file before
    running configure so that configure will re-inspect the environment
    rather than using cached values.

    Common causes of configure failures are: 1) a delegate header is
    not in the header include path (CPPFLAGS -I option); 2) a delegate
    library is not in the linker search/run path (LDFLAGS -L/-R option);
    3) a delegate library is missing a function (old version?); 4)
    compilation environment is faulty.

    If all reasonable corrective actions have been tried and the problem
    appears to be due to a flaw in the configure script, please send a
    bug report to the configure script maintainer (currently
    bfriesen@graphicsmagick.org). All bug reports should contain the
    operating system type (as reported by 'uname -a') and the
    compiler/compiler-version. A copy of the configure script output
    and/or the config.log file may be valuable in order to find the
    problem. If you send a config.log, please also send a script of the
    configure output and a description of what you expected to see (and
    why) so the failure you are observing can be identified and resolved.

  Makefile Build Targets

    Once GraphicsMagick is configured, these standard build targets are
    available from the generated Makefiles:
  
       'make'
          Build the package
  
       'make install'
          Install the package
  
       'make check'
          Run tests using the installed GraphicsMagick ('make install' must
          be done first!).
  
       'make clean'
          Remove everything in the build directory created by 'make'
  
       'make distclean'
          Remove everything in the build directory created by 'configure'
          and 'make'. This is useful if you want to start over from scratch.
  
       'make uninstall'
     	Remove all files from the system which are (or would be)
     	installed by 'make install' using the current configuration.
          Note that this target is imperfect for PerlMagick since Perl
          no longer supports an 'uninstall' target.

  Build & Install:

    Now that GraphicsMagick is configured, type

       make

    to build the package and

       make install

    to install it.

  Verifying The Build:

    To confirm your installation of the GraphicsMagick distribution was
    successful, ensure that the installation directory is in your executable
    search path and type:
  
        gm display

    The GraphicsMagick logo should be displayed on your X11 display.
  
    If the image colors are not correct use this command:
  
        gm display -visual default
  
    For a more serious test, you may run the GraphicsMagick test suite by
    typing
  
        make check

    Note that due to differences between the developer's environment and
    your own it is possible that some tests may be indicated as failed
    even though the results are ok. Differences between the developer's
    environment environment and your own may include the compiler, the
    CPU type, and the library versions used. The GraphicsMagick developers
    use the current release of all dependent libraries.

---------------------------------------------------------------------------

Copyright (C) 2003 GraphicsMagick Group
Copyright (C) 2002 ImageMagick Studio
Copyright (C) 1999 E. I. du Pont de Nemours and Company

This program is covered by multiple licenses, which are described in
Copyright.txt. You should have received a copy of Copyright.txt with this
package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.

