.. This text is in reStucturedText format, so it may look a bit odd.
.. See http://docutils.sourceforge.net/rst.html for details.

=============================
UNIX/Cygwin/MinGW Compilation
=============================

.. contents::
  :local:

Platforms Note
--------------

Platform specific notes regarding specific operating systems may be found
in the `PLATFORMS.txt <PLATFORMS.html>`_ file. The intructions in the
platforms document provide generic instructions which work in most common
cases. Additional notes regarding Cygwin & MinGW are provided later in
this file.

Archive Formats
---------------

GraphicsMagick is distributed in a number of different archive formats.
The source code must be extracted prior to compilation as follows:

  7z

    7-Zip archive format. The Z-Zip format may be extracted under Unix
    using '7za' from the P7ZIP package (http://p7zip.sourceforge.net/).
    Extract similar to::
  
      7za x GraphicsMagick-1.2.7z

  .tar.bz2

    BZip2 compressed tar archive format. Requires that both the bzip2
    (http://www.bzip.org/) and tar programs to be available. Extract
    similar to::
 
      bzip2 -d GraphicsMagick-1.2.tar.bz | tar -xvf -
 
  .tar.gz

    Gzip compressed tar archive format. Requires that both the gzip
    (http://www.gzip.org/) and tar programs to be available. Extract
    similar to::
 
     gzip -d GraphicsMagick-1.2.tar.gz | tar -xvf -

  .tar.lzma

    LZMA compressed tar archive format. Requires that LZMA utils
    (http://tukaani.org/lzma/) and tar programs to be available. Extract
    similar to::
 
      lzma -d GraphicsMagick-1.2.tar.lzma | tar -xvf -

  zip

    PK-ZIP archive format. Requires that the unzip program from Info-Zip
    (http://www.info-zip.org/UnZip.html) be available. Extract similar to::
 
      unzip GraphicsMagick-1.2.zip

The GraphicsMagick source code is extracted into the subdirectory
'GraphicsMagick-1.2'. After the source code extracted, change to the new
directory using the command::

  cd GraphicsMagick-1.2

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-1.2/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. As an alternative, the CONFIG_SITE
environment variable may be used to specify the path of a site
configuration file to load. 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

  --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)

  --enable-ltdl-install
    install libltdl

  --with-included-ltdl
    use the GNU ltdl sources included here

  --with-ltdl-include=DIR
    use the ltdl headers installed in DIR

  --with-ltdl-lib=DIR
    use the libltdl.la installed in DIR

  --with-modules
    enable building 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

  --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

  --with-fpx
    enable FlashPIX support

  --with-gslib
    enable Ghostscript library support (not recommended)

  --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

  --with-umem
    enable umem memory allocation library 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:

--with-included-ltdl, --enable-ltdl-install:

  GraphicsMagick supports loadable coder and filter modules if
  --enable-shared (see below) is specified in order to enable building
  shared libraries. This is true even if --with-modules (see below) has
  not been specified. The libldtl library is used to support this
  feature. A copy of libltdl is included with GraphicsMagick. By default,
  if a suitable libltdl is already installed on the system, it will be
  used. If there is no suitable libltdl installed, then it may be
  necessary to specify --with-included-ltdl to use libltdl as provided
  with GraphicsMagick. The --enable-ltdl-install option enables building
  libltdl locally and also formally installing it at time of 'make
  install'. If your already installed libltdl is supported via a package
  management system then you probably don't want to use this option.

--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!).

--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.

--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.

--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.

--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.

--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.

--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
      ============  ==============

  GraphicsMagick performs all image processing computations using
  double-precision floating point so results are very accurate.
  Increasing the quantum storage size decreases the amount of
  quantization noise (usually not visible at 8 bits) and helps
  prevent countouring and posterization in the image.

--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.

--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.

--without-threads:

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

--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.

--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.

--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.

--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.

--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).

--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.

--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?).OB
  4) The 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. On some systems,
       'make install' must be done before the test suite will work but
       usually the software can be tested prior to installation.
  
    '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 does not work 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.

  Verify that the expected image formats are supported by executing

    gm convert -list formats

  Verify that the expected fonts are available by executing

    gm convert -list fonts

  Verify that delegates (external programs) are configured as expected
  by executing

    gm convert -list delegates

  Verify that color definitions may be loaded by executing

    gm convert -list colors

  If GraphicsMagick is built to use loadable coder modules, then verify
  that the modules load via

    gm convert -list modules

  For a thorough 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 - 2008 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.

