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To install GD on your
system, you'll need to install some system libraries
first. Here is a step-by-step guide to retrieving and
installing them. Again, none of this is necessary if
you're using Perl on Windows or a Mac.
• zlib The zlib compression
library can be obtained from
ftp://ftp.freesoftware.com/pub/infozip/zlib/zlib.tar.gz.
Download and extract the archive. On most systems
(Solaris is an exception) you will not have to
build the zlib library, because when you build
libpng later, it incorporates the source files
rather than the actual library. If you choose to
build and install zlib, use the standard
install procedure:
% ./configure
% make
# make install (as root)
• libpng
Installing libpng is a little more
complicated. You can get the latest version from
ftp://ftp.cdrom.com/pub/png/src/.
Look for something like "libpng-x.y.z.tar.gz", where
x.y.z is the highest version number. Download and
extract the archive. You'll need zlib on the
same level as the libpng directory, and they
should both be named without their versions. In other
words, your directory structure should look like
this:
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+- zlib
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+- libpng
Something like the following should do it. The
actual commands may differ from system to system.
You'll have to remove the archive before doing this
(rm *.tar or rm
*.tar.gz).
% mv zlib* zlib
% mv libpng* libpng
% cd libpng
% cp scripts/makefile.stf Makefile
% make
# make install (as root)
You should choose one of the makefiles in the
libpng/scripts directory according to your
system (such as scripts/makefile.linux for
Linux or scripts/makefile.sunos for
Solaris).
• lttf (optional)
If you want support for TrueType fonts in your
graphs (say, because you want your axis labels in
Japanese), you can install the lttf library. You
cannot build this if you don't have X Windows
installed. You can download lttf from http://freetype.sourceforge.net/download.html
and then build it as usual:
% ./configure
% make
# make install (as root)
• jpeg-6b
You will need the jpeg-6a (or later)
library on your system for GD.pm to compile. It is
often already installed, so check /usr/lib
or /usr/local/lib for libjpeg. If
it's not installed, you can download it from ftp://ftp.uu.net/graphics/jpeg/
and build it with the steps shown above. Alternately,
there may be a precompiled packaged version (RPM,
DEB, etc.) available from your local package
site.
• libgd
Installing libgd should now be
straightforward. Download the latest version from
ftp://ftp.boutell.com/pub/boutell/gd/.
After extracting the archive, edit the Makefile so
that it includes support for jpeg and
ttf if you installed those packages. You may
also have to add
-I/usr/local/include/freetype to the
INCLUDEDIRS= line to make it work with
freetype-1.3.1. You can then build the library
as follows:
% make
# make install (as root)
You will now be able to install GD and the rest of
the Perl modules mentioned in this article.
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