sdl dependencies?

[Tupshin Harper <tupshin@tupshin.com>]

I'm trying to build the latest unstable source, and "make tools" fails here:
make[4]: Entering directory 
`/usr/src/xen-unstable/tools/ioemu/target-i386-dm'
gcc  -Wl,-T,/usr/src/xen-unstable/tools/ioemu/x86_32.ld -o qemu-dm vl.o 
exec.o monitor.o osdep.o block.o readline.o pci.o console.o 
block-cloop.o ide.o ne2000.o pckbd.o vga.o dma.o fdc.o mc146818rtc.o 
serial.o i8259.o i8254.o pc.o port-e9.o cirrus_vga.o vnc.o sdl.o 
libqemu.a  -lm -L../../libxc -lxc -lz  -L/usr/lib -lvncserver -lnsl 
-lpthread -ljpeg -lz -lutil
sdl.o(.text+0x49e): In function `sdl_resize':
/usr/src/xen-unstable/tools/ioemu/sdl.c:72: undefined reference to 
`SDL_SetVideoMode'

followed by a bunch of other undefined references, all referring to sdl.

Running debian (sarge), and I've installed every conceivable sdl package 
with no luck. What do I need to get this to compile?

Thanks
-Tupshin