=head1 NAME

rrdbuild - Instructions for building RRDtool

=head1 OVERVIEW

If you downloaded the source of RRDtool you have to compile it. This
document will give some information on how this is done.

RRDtool relies on services of third part libraries. Some of these libraries
may already be installed on your system. You have to compile copies of the other
ones before you can build RRDtool.

This document will tell you about all the necessary steps to get going.

These instructions assume you are using a B<bash> shell. If you use csh/tcsh,
then you can either type F<bash> to switch to bash for the compilation or if
you know what you are doing just replace the export bits with
setenv.

We further assume that your copies of B<tar> and B<make> are actually B<GNU
tar> and B<GNU make> respectively. It could be that they are installed as
B<gtar> and B<gmake> on your system.

=head1 OPTIMISTIC BUILD

Before you start to build RRDtool, you have to decide two things:

=over

=item 1.

In which directory you want to build the software.

=item 2.

Where you want to install the software.

=back

Once you have decided. Save the two locations into environment variables.

 BUILD_DIR=/tmp/rrdbuild
 INSTALL_DIR=/opt/rrdtool-1.5.999


If your F</tmp> is mounted with the option noexec (RHEL seems todo that) you have to choose
a different directory!

Now make sure the BUILD_DIR exists and go there:

 mkdir -p $BUILD_DIR
 cd $BUILD_DIR

Lets first assume you already have all the necessary libraries
pre-installed. 

 wget http://oss.oetiker.ch/rrdtool/pub/rrdtool-1.5.999.tar.gz
 gunzip -c rrdtool-1.5.999.tar.gz | tar xf -
 cd rrdtool-1.5.999
 ./configure --prefix=$INSTALL_DIR && make && make install

Ok, this was very optimistic. This try will probably have ended with
B<configure> complaining about several missing libraries.

=head1 INSTALLING DEPENDENCIES

If your OS lets you install additional packages from a software repository,
you may get away with installing the missing packages. When the packages are
installed, run configure again and try to compile again. Below you find some
hints on getting your OS ready for compiling RRDtool.

Additions to this list are welcome. In general RRDtool should work with the
latest versions of the libraries. The versions listed here are just what was
current when I tested this.

=head2 OpenSolaris 2008.05

Just add a compiler and the gnome development package:

 pkg install sunstudioexpress
 pkg install SUNWgnome-common-devel

There is a problem with F<cairo.pc> on OpenSolaris. It suggests that
xrender is required for compilation with cairo. This is not true and also
bad since OpenSolaris does not include an F<xrender.pc> file. Use Perl to
fix this:

 perl -i~ -p -e 's/(Requires.*?)\s*xrender.*/$1/' /usr/lib/pkgconfig/cairo.pc 

Make sure the RRDtool build system finds your new compiler

 export PATH=/opt/SunStudioExpress/bin

=head2 Debian / Ubuntu

Use apt-get to make sure you have all that is required. A number
of packages will get added through dependencies.

 apt-get install libpango1.0-dev libxml2-dev

=head2 Gentoo

In Gentoo installing RRDtool is really simple you just need to B<emerge
rrdtool>. All dependencies will be handled automatically by the portage
system. The only thing you should care about are USE flags, which allow you
fine tune features RRDtool will be built with. Currently the following USE
flags are available:

 doc    - install .html and .txt documentation
          into /usr/share/doc/rrdtool-1.x.xx/
 perl   - build and install perl language bindings
 python - build and install python language bindings
 ruby   - build and install ruby language bindings
 tcl    - build and install tcl language bindings
 rrdcgi - build and install rrdcgi

After you've decided which USE flags you need, set them either in
F<make.conf> or F</etc/portage/package.use> and finally run:

 # emerge -va rrdtool

Take a look at Gentoo handbook for further details on how to manage USE
flags: http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=2

=head1 BUILDING DEPENDENCIES

But again this may have been too optimistic still, and you actually have to
compile your own copies of some of the required libraries. Things like
libpng and zlib are pretty standard so you will probably have them on your
system anyway. Freetype, Fontinst, Cairo, Pango may be installed, but it is
possible that they are pretty old and thus don't live up to our
expectations, so you may want to compile their latest versions.

=head2 General build tips for AIX

If you are working with AIX, you may find the B<--disable-shared> option
will cause things to break for you. In that case you may have to install the
shared libraries into the RRDtool PREFIX and work with B<--disable-static>
instead.

Another hint to get RRDtool working on AIX is to use the IBM XL C Compiler:

 export CC=/usr/vac/bin/cc
 export PERLCC=$CC

(Better instructions for AIX welcome!)

=head2 Build Instructions

Some libraries want to know where other libraries are. For this to work,
set the following environment variable

 export PKG_CONFIG_PATH=${INSTALL_DIR}/lib/pkgconfig
 export PATH=$INSTALL_DIR/bin:$PATH

The above relies on the presence of the F<pkgconfig> program. Below you find instructions
on how to compile pkgconfig.

Since we are compiling libraries dynamically, they must know where to find
each other. This is done by setting an appropriate LDFLAGS. Unfortunately,
the syntax again differs from system to system:

=over

=item Solaris

 export LDFLAGS=-R${INSTALL_DIR}/lib 

if you are using the Sun Studio/Forte compiler, you may also want to set

 CFLAGS="-xO3 -xcode=pic13"   (SPARC)
 CFLAGS="-xO3 -Kpic"          (x86)

=item Linux

 export LDFLAGS="-Wl,--rpath -Wl,${INSTALL_DIR}/lib" 

=item HPUX

 export LDFLAGS="+b${INSTALL_DIR}/lib"

=item AIX

 export LDFLAGS="-Wl,-blibpath:${INSTALL_DIR}/lib"

=back 

If you have GNU make installed and it is not called 'make',
then do

 export MAKE=gmake
 export GNUMAKE=gmake

otherwise just do

 export MAKE=make

=head3 Building pkgconfig

As mentioned above, without pkgconfig the whole build process will be lots
of pain and suffering, so make sure you have a copy on your system. If it is
not available natively, here is how to compile it.

 wget http://pkgconfig.freedesktop.org/releases/pkg-config-0.23.tar.gz
 gunzip -c pkg-config-0.23.tar.gz | tar xf -
 cd pkg-config-0.23
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC"
 $MAKE
 $MAKE install

After installing pkgconfig in a custom directory, setting up the corresponding
environment variable will be helpful.

 export PKG_CONFIG=$INSTALL_DIR/bin/pkg-config

=head3 Building zlib

Chances are very high that you already have that on your system ... 

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/zlib-1.2.3.tar.gz
 gunzip -c zlib-1.2.3.tar.gz | tar xf -
 cd zlib-1.2.3
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC" --shared
 $MAKE
 $MAKE install

=head3 Building libpng

Libpng itself requires zlib to build, so we need to help a bit. If you
already have a copy of zlib on your system (which is very likely) you can
drop the settings of LDFLAGS and CPPFLAGS. Note that the backslash (\) at
the end of line 4 means that line 4 and line 5 are on one line.

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/libpng-1.2.18.tar.gz
 gunzip -c libpng-1.2.18.tar.gz | tar xf -
 cd libpng-1.2.18
 env CFLAGS="-O3 -fPIC" ./configure --prefix=$INSTALL_DIR
 $MAKE
 $MAKE install

=head3 Building freetype

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/freetype-2.3.5.tar.gz
 gunzip -c freetype-2.3.5.tar.gz | tar xf -
 cd freetype-2.3.5
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC"
 $MAKE
 $MAKE install

If you run into problems building freetype on Solaris, you may want to try to
add the following at the start the configure line:

 env EGREP=egrep

=head3 Building LibXML2

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/libxml2-2.6.32.tar.gz
 gunzip -c libxml2-2.6.32.tar.gz | tar xf -
 cd libxml2-2.6.32
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC"
 $MAKE
 $MAKE install

=head3 Building fontconfig

Note that fontconfig has a run time configuration file in INSTALL_DIR/etc you
may want to adjust that so that fontconfig finds the fonts on your system.
Run the fc-cache program to build the fontconfig cache after changing the
config file.

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/fontconfig-2.4.2.tar.gz
 gunzip -c fontconfig-2.4.2.tar.gz   | tar xf -
 cd fontconfig-2.4.2
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC" --with-freetype-config=$INSTALL_DIR/bin/freetype-config
 $MAKE
 $MAKE install

=head3 Building Pixman

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/pixman-0.10.0.tar.gz
 gunzip -c pixman-0.10.0.tar.gz  | tar xf -
 cd pixman-0.10.0
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC"
 $MAKE
 $MAKE install

=head3 Building Cairo

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/cairo-1.6.4.tar.gz
 gunzip -c cairo-1.6.4.tar.gz   | tar xf -
 cd cairo-1.6.4
 ./configure --prefix=$INSTALL_DIR \
    --enable-xlib=no \
    --enable-xlib-render=no \
    --enable-win32=no \
    CFLAGS="-O3 -fPIC"
 $MAKE
 $MAKE install

When building on Solaris you may want todo

 ./configure --prefix=$INSTALL_DIR \
    --enable-xlib=no \
    --enable-xlib-render=no \
    --enable-win32=no \
    CFLAGS="-O3 -fPIC -D_POSIX_PTHREAD_SEMANTICS"

=head3 Building Glib

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/glib-2.15.4.tar.gz
 gunzip -c glib-2.15.4.tar.gz  | tar xf -
 cd glib-2.15.4
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC"
 $MAKE
 $MAKE install

=head3 Building Pango

 cd $BUILD_DIR
 wget http://oss.oetiker.ch/rrdtool/pub/libs/pango-1.21.1.tar.bz2
 bunzip2 -c pango-1.21.1.tar.bz2 | tar xf -
 cd pango-1.21.1
 ./configure --prefix=$INSTALL_DIR CFLAGS="-O3 -fPIC" --without-x
 $MAKE
 $MAKE install

=head2 Building rrdtool (second try)

Now all the dependent libraries are built and you can try again. This time
you tell configure where it should be looking for libraries and include
files. This is done via environment variables. Depending on the shell you
are running, the syntax for setting environment variables is different.

And finally try building again. We disable the python and tcl bindings
because it seems that a fair number of people have ill configured python and
tcl setups that would prevent RRDtool from building if they are included in
their current state.

 cd $BUILD_DIR/rrdtool-1.5.999
 ./configure --prefix=$INSTALL_DIR --disable-tcl --disable-python
 $MAKE clean
 $MAKE
 $MAKE install

SOLARIS HINT: if you want to build  the Perl module for the native Perl (the
one shipping with Solaris) you will need the Sun Forte compiler installed on
your box or you have to hand-tune bindings/perl-shared/Makefile while
building!

Now go to I<$INSTALL_DIR>B</share/rrdtool/examples/> and run them to see if
your build has been successful.

=head1 AUTHOR

Tobias Oetiker E<lt>tobi@oetiker.chE<gt>