gimp/INSTALL

Installation instructions for GIMP 2.1
--------------------------------------

There are some basic steps to building and installing this development
version of The GIMP.

Since the plug-in API of GIMP 2.2 will be compatible with GIMP 2.0,
2.2 is supposed to install itself into the gimp-2.0 directories. It is
thus not possible to install this development version into the same
prefix with GIMP 2.0. A number of files will clash, so PLEASE USE A
SEPARATE PREFIX to install this development version!!

The most important part is to make sure the requirements for a build
are fulfilled.  We depend on a number of tools and libraries which are
listed below. For libraries this means you need to also have the
header files installed.

  1. You need to have installed a recent version of pkg-config available
     from http://www.freedesktop.org/software/pkgconfig/.  

  2. You need to have installed GTK+ version 2.4.1 or better. Do not
     try to use an older GTK+ version (1.2.x), it will not work.
     GTK+-2.2 itself needs recent versions of GLib, Pango and ATK.
     Sources for these can be grabbed from ftp://ftp.gtk.org/.
     GTK+-2.x and friends can be installed side by side with GTK+-1.2.

  3. We require PangoFT2, a Pango backend that uses FreeType2. Make sure 
     you have FreeType2 and fontconfig installed before you compile Pango.
     FreeType2 can be downloaded from http://www.freetype.org/.
     Fontconfig from http://x2.freedesktop.org/software/fontconfig.

  4. We use libart2. Grab the module libart_lgpl out of GNOME CVS or
     fetch the tarball from
     ftp://ftp.gnome.org/pub/gnome/sources/libart_lgpl/

  5. You may want to install other third party libraries or programs that
     are needed for some of the available plugins. We recommend to check
     that the following libraries are installed: libpng, libjpeg,
     libtiff, gimp-print (4.2.x), gtkhtml-2, libmng, librsvg, libwmf.

  6. Configure the GIMP by running the `configure' script. You may want
     to pass some options to it, see below.

  7. Build the GIMP by running `make'. The use of GNU make is recommened.
     If you need to tweak the build to make it work with other flavours
     of make, we'd appreciate if you'd send us a patch with the changes.

  8. Install the GIMP by running `make install'. In order to avoid clashes
     with other versions of The GIMP, we install a binary called gimp-2.1.
     By default there's also a link created so that you can type 'gimp'
     to start gimp-2.1. If you have the 1.2 version installed, you should
     still be able to run it using 'gimp-1.2'.

Unless you are experienced with building software from source, you
should not attempt to build all these libraries yourself. We suggest
you check if your distributor has development packages of them.

Please make sure you don't have any old GTK+-2.x, jpeg, etc. libraries 
lying around on your system, otherwise configure may fail to find the 
new ones.

Generic instructions for configuring and compiling auto-configured
packages are included below. Here is an illustration of commands that
might be used to build and install the GIMP. The actual configuration,
compilation and installation output is not shown.

  % tar xvfz gimp-2.1.x.tar.gz   # unpack the sources
  % cd gimp-2.1.x                # change to the toplevel directory
  % ./configure                  # run the `configure' script
  % make                         # build the GIMP
  % make install                 # install the GIMP

The `configure' script examines your system, and adapts the GIMP to
run on it. The script has many options, some of which are described in
the generic instructions included at the end of this file. All of the
options can be listed using the command `./configure --help'. There
are five commands special options the GIMP `configure' script
recognizes. These are:

  --enable-shared and --disable-shared.  This option affects whether
     shared libraries will be built or not. Shared libraries provide
     for much smaller executables. The default is to enable shared
     libraries. Disabling shared libraries is almost never a good idea.

  --enable-debug and --disable-debug.  This option causes the build
     process to compile with debugging enabled. If debugging is
     disabled, the GIMP will instead be compiled with optimizations turned
     on. The default is for debugging to be disabled. NOTE: This
     option is intended primarily as a convenience for developers.

  --enable-ansi and --disable-ansi.  This option causes stricter
     ANSI C checking to be performed when compiling with GCC. The
     default is for strict checking to be disabled. NOTE: This option
     is intended primarily as a convenience for developers.

  --enable-gimpdir=DIR.  This option changes the default directory
     the gimp uses to search for its configuration files from ~/.gimp-2.1 
     (the directory .gimp-2.1 in the users home directory) to DIR.

  --without-libtiff, --without-libjpeg, --without-libpng.  configure
     will bail out if libtiff, libjpeg or libpng can not be found. You
     better fix the underlying problem and install these libraries with
     their header files. If you absolutely want to compile GIMP without
     support for TIFF, JPEG or PNG you need to explicitely disable
     them using the options given above.
 
  --without-exif.  If libexif is available, the JPEG plug-in will use
     it to keep EXIF data in your JPEG files intact.  If this is
     causing any trouble at compile-time, you can build --without-exif.
     Get libexif from http://www.sourceforge.net/projects/libexif.

  --without-mng, --without-aa.  The MNG plug-in needs libmng and
     configure checks for its presense. If for some reason you don't
     want to build the MNG plug-in even though the library is installed,
     use --without-mng to disable it expliticely. The same switch exists
     for aalib, use --without-aa if you run into problems.

  --with-gif-compression=[lzw|rle|none].  Allows to tune the compression
     algorithm used by the GIF plug-in. If you are afraid of Unisys' LZW
     patent, you can go for simple run-length encoding or even configure
     the plug-in to create uncompressed GIFs.

  --enable-gtk-doc.  This option controls whether the libgimp API
     references will be created using gtk-doc. The HTML pages are 
     included in a standard tarball, so you will only need this if you
     are building from CVS.

  --with-html-dir=PATH.  This option allows to specify where the
     libgimp API reference should be installed. You might want to modify
     the path so it points to the place where glib and gtk+ installled
     their API references so that the libgimp reference can link to
     them.

  --disable-print.  The print plug-in requires a recent version of
     libgimpprint. If you don't have it already installed, download
     it from http://gimp-print.sourceforge.net/. You need to pass
     --without-gimp to gimp-print's configure script to build it without
     having gimp-1.2 installed. If you want to compile GIMP without
     support for printing, use the --disable-print option.

  --enable-mp. This options control whether to build GIMP with or without
     support for multiple processors. This option is off by default. If
     you do have multiply processors and run GIMP with an OS supporting
     them you will like to enable this features to use all of your
     horsepower. Enabling it on singleprocessor systems won't harm but
     cause a bit processing overhead.

  --with-sendmail=[PATH]. This option is used to tell GIMP where to find
     the sendmail command. Normally this options don't have to be used
     because configure tries to find it in the usual places.

  --with-desktop-dir=[PATH]. This option specifies where to install
     links to the gimp desktop files. These files are used by desktop
     environments that comply to the specs published at freedesktop.org.
     The default value ${prefix}/share should be fine if your desktop
     environment is installed in the same prefix as gimp. No links are
     created if the desktop directories don't exist or you used
     --without-desktop-dir.

  --disable-default-binary. Use this option if you don't want to make
     gimp-2.1 the default gimp installation. Otherwise a link called
     gimp pointing to the gimp-2.1 executable will be installed.

The `make' command builds several things:
 - A bunch of public libraries in the directories starting with 'libgimp'.
 - The plug-in programs in the 'plug-ins' directory.
 - Some modules in the 'modules' subdirectory.
 - The main GIMP program 'gimp-2.1' in `app'.

The `make install' commands installs the gimp header files associated 
with the libgimp libraries, the plug-ins, some data files and the GIMP 
executable. After running `make install' and assuming the build process 
was successful you should be able to run `gimp'.


When ./configure fails
======================

'configure' uses pkg-config, a tool that replaces the old foo-config
scripts. The most recent version is available from 
	http://www.freedesktop.org/software/pkgconfig/

'configure' tries to compile and run a short GTK+ program. There are
several reasons why this might fail:

* pkg-config could not find the file 'gtk+-2.0.pc' that gets installed 
  with GTK. (This file is used to get information about where GTK+ is
  installed.)

  Fix: Either make sure that this file is in the path where pkg-config 
  looks for it (try 'pkg-config --debug' or add the location of 
  gtk+-2.0.pc to the environment variable PKG_CONFIG_PATH before running 
  configure.

* Libraries you installed are not found when you attempt to start gimp.
  The details of how to fix this problem will depend on the system:

  On Linux and other systems using ELF libraries, add the directory to
  holding the library to /etc/ld.so.conf or to the environment variable
  LD_LIBRARY_PATH, and run 'ldconfig'.

  On other systems, it may be necessary to encode this path
  into the executable, by setting the LDFLAGS environment variable
  before running configure. For example:

    LDFLAGS="-R/home/joe/lib" ./configure
  or
    LDFLAGS="-Wl,-rpath -Wl,/home/joe/lib" ./configure

* An old version of the GTK+ libraries was found instead of 
  your newly installed version. This commonly happens if a
  binary package of GTK+ was previously installed on your system,
  and you later compiled GTK+ from source.

  Fix: remove the old libraries and include files.

A detailed log of the ./configure output is written to the file
config.log. This may help diagnose problems.


When ./configure fails on plug-ins
==================================

There are some GIMP plug-ins that need additional third-party libraries 
installed on your system. For example to compile the plug-ins that load 
and save JPEG, PNG or TIFF files you need the related libraries and header 
files installed, otherwise you'll get a message that plugin xyz will not 
be build. 

If you are sure that those libraries are correctly installed, but configure
fails to detect them, the following might help:

Set your LDFLAGS environment variable to look for the library in a certain
place, e.g. if you are working in a bash shell you would say:
      export LDFLAGS="-L<path_to_library> -L<path_to_another_one>"
before you run configure.

Set your CPPFLAGS environment variable to look for the header file in a
certain place, e.g. if you are working in a bash shell you would say:
      export CPPFLAGS="-I<path_to_header_file> -I<path_to_another_one>"
before you run configure.

* If the check for gimpprint fails even though you have version 4.2.x
  installed, please try the latest available 4.2 package (which is
  gimp-print 4.2.7-pre1 at the time of this writing).


      Generic Instructions for Building Auto-Configured Packages
      ==========================================================


To compile this package:

1.  Configure the package for your system.  In the directory that this
file is in, type `./configure'.  If you're using `csh' on an old
version of System V, you might need to type `sh configure' instead to
prevent `csh' from trying to execute `configure' itself.

The `configure' shell script attempts to guess correct values for
various system-dependent variables used during compilation, and
creates the Makefile(s) (one in each subdirectory of the source
directory).  In some packages it creates a C header file containing
system-dependent definitions.  It also creates a file `config.status'
that you can run in the future to recreate the current configuration.
Running `configure' takes a minute or two.

To compile the package in a different directory from the one
containing the source code, you must use GNU make.  `cd' to the
directory where you want the object files and executables to go and
run `configure' with the option `--srcdir=DIR', where DIR is the
directory that contains the source code.  Using this option is
actually unnecessary if the source code is in the parent directory of
the one in which you are compiling; `configure' automatically checks
for the source code in `..' if it does not find it in the current
directory.

By default, `make install' will install the package's files in
/usr/local/bin, /usr/local/lib, /usr/local/man, etc.  You can specify
an installation prefix other than /usr/local by giving `configure' the
option `--prefix=PATH'.

You can specify separate installation prefixes for machine-specific
files and machine-independent files.  If you give `configure' the
option `--exec-prefix=PATH', the package will use PATH as the prefix
for installing programs and libraries.  Normally, all files are
installed using the same prefix.

`configure' ignores any other arguments that you give it.

If your system requires unusual options for compilation or linking
that `configure' doesn't know about, you can give `configure' initial
values for some variables by setting them in the environment.  In
Bourne-compatible shells, you can do that on the command line like
this:
        CC='gcc -traditional' DEFS=-D_POSIX_SOURCE ./configure

The `make' variables that you might want to override with environment
variables when running `configure' are:

(For these variables, any value given in the environment overrides the
value that `configure' would choose:)
CC              C compiler program.
                Default is `cc', or `gcc' if `gcc' is in your PATH.
INSTALL         Program to use to install files.
                Default is `install' if you have it, `cp' otherwise.
INCLUDEDIR      Directory for `configure' to search for include files.
                Default is /usr/include.

(For these variables, any value given in the environment is added to
the value that `configure' chooses:)
DEFS            Configuration options, in the form '-Dfoo -Dbar ...'
LIBS            Libraries to link with, in the form '-lfoo -lbar ...'

If you need to do unusual things to compile the package, we encourage
you to teach `configure' how to do them and mail the diffs to the
address given in the README so we can include them in the next
release.

2.  Type `make' to compile the package.

3.  Type `make install' to install programs, data files, and
documentation.

4.  You can remove the program binaries and object files from the
source directory by typing `make clean'.  To also remove the
Makefile(s), the header file containing system-dependent definitions
(if the package uses one), and `config.status' (all the files that
`configure' created), type `make distclean'.

The file `configure.in' is used as a template to create `configure' by
a program called `autoconf'.  You will only need it if you want to
regenerate `configure' using a newer version of `autoconf'.