name-mangling schemes.
The pkg-config utility is required for configuration, it can be downloaded
-from <http://pkg-config.freedesktop.org/>.
+from <http://pkg-config.freedesktop.org/>. Also Python version >= 2.6 is
+required.
To build the GiNaC tutorial and reference manual the doxygen utility
(it can be downloaded from http://www.stack.nl/~dimitri/doxygen) and