Reason for the backports:

- libfreetype6: crash with FreeType 2.2.1 -> lenny backport

- libsdl-tty2.0-0: problem with rendering fonts with bold style
  -> lenny backport

- libzip: I used to build with zziplib, but distros ship either 0.12
  or 0.13 and I don't want to double-compile. So I switched to libzip
  -> lenny backport

- libffi: Debian Etch has libffi4, which works, but is in a different
  package than in Lenny, where it's libffi5. This make it necessary to
  double-compile the package. Instead I quickly backported libffi5.

For minimal systems that don't have the packages (e.g. eee-pc/xandros):

- wxwidgets: downloaded from the Debian Etch archive:
dget http://ftp.fr.debian.org/debian/pool/main/w/wxwidgets2.6/wxwidgets2.6_2.6.3.2.1.5.dsc
for i in libwxbase2.6-0_2.6.3.2.1.5_i386.deb libwxbase2.6-dbg_2.6.3.2.1.5_i386.deb libwxbase2.6-dev_2.6.3.2.1.5_i386.deb libwxgtk2.6-0_2.6.3.2.1.5_i386.deb libwxgtk2.6-dbg_2.6.3.2.1.5_i386.deb libwxgtk2.6-dev_2.6.3.2.1.5_i386.deb python-wxgtk2.6_2.6.3.2.1.5_i386.deb wx-common_2.6.3.2.1.5_i386.deb wx2.6-headers_2.6.3.2.1.5_i386.deb ; do wget http://ftp.fr.debian.org/debian/pool/main/w/wxwidgets2.6/$i; done


Build dependencies (not needed to use the program, only to build the
.deb package):

- intltool: new version has a different and backward-incompatible
  build system -> lenny backport