You can now retrieve SDL current development source code via CVS:
Install CVS (available from http://www.loria.fr/~molli/cvs-index.html)
Then:
Create a work directory (say ~cvs)
cd ~/cvs
cvs -d :pserver:guest at devolution.com:/home/slouken/cvsroot login
# password is "cvsguest"
cvs -d :pserver:guest at devolution.com:/home/slouken/cvsroot checkout sdl
cd sdl; make
Every few days, you should run “make spotless; cvs update” from the sdl
subdirectory to get the latest developer changes.