Log message:
Set GNU_CONFIGURE instead of HAS_CONFIGURE and manual prefix.
Uses c++, so add it to USE_LANGUAGES. Sort bl3.mk includes.

XXX: does not seem to use SDL_ttf, but provide its own copy,
which does not compile with current freetype2 for me.

Log message:
Globulation 2 is an innovative Real-Time Strategy (RTS) game which reduces
micro-management by automatically assigning tasks to units.
Also included is a scripting language for versatile gameplay or tutorials and
an integrated map editor. Globulation2 can be played in single player mode,
through your local network, or over the Internet with Ysagoon Online Gaming
(pronounced yog as in yoghurt).
Glob2 is Free Software, licensed and distributed under the GNU General Public
License.

WWW: http://www.globulation2.org