+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 the
+expectations, so you may want to compile their latest versions.
+
+=head3 Build Tipps for AIX
+
+If you are woking 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=$CC
+
+(Better instructions for AIX welcome!)
+
+=head2 Building Libraries
+
+In order to build the libraries you need a compiler on your system.
+Unfortunately compilers are not all alike. This has an effect on the CFLAGS
+you want to set. The examples below are for the popular GCC compiler suite.
+If you have an other compile you have to use the following settings:
+
+=over
+
+=item Sun Forte
+
+ CFLAGS="-xO3 -kPIC"
+
+=back
+
+=over
+
+Some libraries want to know where other libraries are. For this to work,
+set the following environamen variable
+
+ export PKG_CONFIG_PATH=${INSTALL_DIR}/lib/pkgconfig
+ export PATH=$INSTALL_DIR/bin:$PATH
+
+Since we are compiling libraries dynamically, you they must further know
+where to find each other. This is done by setting an appropriate LDFLAG.
+Unfortunatly the syntax differs from system to system: