The simple-screensaver extension includes xscreensaver's animations (which the xscreensaver project keeps in a directory called "libexec") as well as the "xscreensaver-getimage" utility.

To compile xscreensaver:

$ tce-load -wi compiletc bc intltool libglade-dev gdk-pixbuf2-dev Xorg-7.7-3d-dev pkg-config gtk2-dev shared-mime-info

For the 3D animations to compile, at least one of the extensions below is required. My shotgun approach was to load all of these instead of trying to figure out which one(s) is/are required:

$ tce-load -wi libGL-dev libGLESv2-dev libEGL-dev glu-dev glade-dev gegl-dev

$ cd xscreensaver-5.44
$ ./configure --prefix=/usr/local --with-pixbuf --with-jpeg --with-setuid-hacks --with-gl
$ make
$ sudo make install