+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:$PATH
+
+Since we are compiling libraries dynamically, you they must further know
+where to find each other. This is done by setting an appropriate LDFLAG.
+Unfortunatly the syntax differs from system to system:
+
+=over
+
+=item Solaris
+
+ export LDFLAGS=-R${INSTALL_DIR}/lib
+
+=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 GNUmake installed and it is not called 'make',
+then do
+
+ export MAKE=gmake
+ export GNUMAKE=gmake
+
+otherwhise just do
+
+ export MAKE=make
+
+