README.source for gerris in Debian
==================================

The download from upstream is a snapshot tarball which contains two
external modules:
- RStarTree, without copyrigth/license info.
- fes2004, from Thierry LETELLIER, licensed under GPL, but including
  some functions from Aktarus library (from Thierry LETELLIER and
  Laurent ROBLOU). The Aktarus functions include some GPL-incompatible
  restrictions.

This external modules aren't essential to gerris and was removed from
the Debian sources.

The debian/get-orig-source.sh script downloads the upstream source, and
creates the gerris_$VERSION.orig.tar.gz used as Debian source file. The
script does the following:
- download the latest upstream tarball
- unpack the tarball
- remove modules/
- update configure, configure.in, Makefile.in, and Makefile.am,
  removing references to modules/ (preserving timestamps).
- rename sources dir and set timestamps from upstream tarball
- tar and gzip the result
