+ 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 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: