.. 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 `www/platforms.rst <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-1.3.7z .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-1.3.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-1.3.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-1.3.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-1.3.zip The GraphicsMagick source code is extracted into the subdirectory 'GraphicsMagick-1.3'. After the source code extracted, change to the new directory using the command:: cd GraphicsMagick-1.3 Build Configuration ------------------- 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 separate build directory by specifying the full path to configure (e.g. /src/GraphicsMagick-1.3/configure). The advantage of using a separate 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=c99 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. The build now supports a Linux-style "silent" build (default disabled). To enable this, add the configure option --enable-silent-rules or invoke make like 'make V=0'. If the build has been configured for silent mode and it is necessary to see a verbose build, then invoke make like 'make V=1'. 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-openmp disable use of OpenMP (automatic multi-threaded loops) at all --enable-openmp-slow enable OpenMP for algorithms which sometimes run slower --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++ --with-perl enable 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. --disable-openmp By default, GraphicsMagick is compiled with support for OpenMP (http://www.openmp.org/) if the compilation environment supports it. OpenMP automatically parallizes loops across concurrent threads based on instructions in pragmas. OpenMP is relatively new to GCC and was introduced in GCC 4.2. OpenMP is a standard and was implemented in some other compilers long before its appearance in GCC. OpenMP adds additional build and linkage requirements. The OpenMP support provided by GCC ("GOMP") automatically enables use of OpenMP with the number of threads equal to the number of CPU cores in the system. Other implementations of OpenMP do not enable parallelization by default. According to the OpenMP standard, the OMP_NUM_THREADS environment variable specifies how many threads should be used. In order to obtain the best single-user performance, set OMP_NUM_THREADS equal to the number of available CPU cores. --enable-openmp-slow On some systems, relatively fast algorithms run slower (rather than faster) as threads are added via OpenMP. This may be due to CPU cache and memory architecture implementation, or OS thread API implementation. Since it is not known how a system will behave without testing, these algorithms are now disabled for OpenMP by default. This option should usually be enabled for AIX, Linux, and Solaris, which work well with OpenMP. AMD Opteron and AMD K10 architecture chips works well with this option. Intel Core 2 Duo works well, but Core 2 Quad does not. IBM Power works well. UltraSPARC works well. --with-perl Use this option to include PerlMagick in the GraphicsMagick build and test suite. While PerlMagick is always configured by default (PerlMagick/Makefile.PL is generated by the configure script), PerlMagick is no longer installed by GraphicsMagick's ''make install''. The procedure to configure, build, install, and check PerlMagick is described in PerlMagick/README.txt. When using a shared library build of GraphicsMagick, it is necessary to formally install GraphicsMagick prior to building PerlMagick in order to achieve a working PerlMagick since otherwise the wrong GraphicsMagick libraries may be used. 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. Experience suggests that static PerlMagick builds may not be fully successful for Perl versions newer than 5.8.8. --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. Lucky for us, the most common delegate libraries are available pre-built, as part of the GnuWin32 project, from http://gnuwin32.sourceforge.net/packages.html The relevant packages are bzip2, freetype, jbigkit, libintl, jpeg, libpng, libtiff, libwmf and zlib. However, note that for freetype to be detected by configure, you must move the ``freetype`` directory out of ``GnuWin32\include\freetype2`` and into ``GnuWin32\include``. 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 - 2010 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/Copyright.html.