Dependencies:
 SDL
 SDL_mixer
 GL
 GLU
 glut

On Ubuntu you can get all necessary packages by typing:
 sudo apt-get install g++ make libsdl-mixer1.2-dev libglut3-dev

Copy the Makefile in the build/linux directory to the top directory.
(The one where there's all the subdirs, including 'src')
From there you can 'make' and 'make install'.

For cross-compiling on debian (mingw package):
make CXX=i686-w64-mingw32-g++ CFLAGS="-g3 -O3 `/usr/i686-w64-mingw32/SDL-1.2.15/bin/sdl-config --cflags` -I/usr/i686-w64-mingw32/include/SDL -Wall -D_WIN32" LDFLAGS="`/usr/i686-w64-mingw32/SDL-1.2.15/bin/sdl-config --libs` -lopengl32 -lfreeglut -lglu32 -Wl,--subsystem,windows /usr/i686-w64-mingw32/runtime/SDL_mixer.dll" EXE=nether.exe
