I received a kind note from a Debian user explaining that Debian provides archives for old packages.
In this case, we can find certified Debian packages compiled for all architectures at <http://snapshot.debian.org/package/fontconfig/2.13.0-5/#fontconfig_2.13.0-5> -- Francesco Potortì (ricercatore) Voice: +39.050.621.3058 ISTI - Area della ricerca CNR Mobile: +39.348.8283.107 via G. Moruzzi 1, I-56124 Pisa Skype: wnlabisti (entrance 20, 1st floor, room C71) Web: http://fly.isti.cnr.it