emerge foobillard (version 2.5) disables sdl support even with sdl is USE. I think this is due to the --disable-glut configure option which actually has the effect of enabling glut and disabling sdl (bug in configure script). However simply removing the term --disable-glut from line 36 of the ebuild seems to solve the problem. Note that there is no sound support when using glut over sdl. Reproducible: Always Steps to Reproduce: 1. 2. 3.
2.7 is now in portage and it's configure.in is this: AC_ARG_ENABLE(SDL, [ --enable-SDL use SDL-lib instead of glut (default)], [export USE_SDL=yes], [export USE_SDL=no]) AC_ARG_ENABLE(glut, [ --enable-glut use glut instead of SDL-lib], [export USE_SDL=no], [export USE_SDL=yes]) so it should be all set now