[Qemu-devel] make fails with confusing message if sdl audio enabled but sdl graphics not

[Peter Maydell]

If you configure like this:
 configure --disable-sdl --audio-drv-list=sdl
then configure will succeed but attempting to make fails with
a confusing message:

$ make
Makefile:259: *** ui/sdl.mo added in common-obj-y but ui/sdl.mo-objs
is not set. Stop.

(I actually encountered this on an OpenBSD system where
'sdl' is the default audio driver and the system happened
not to have sdl installed, so it doesn't need any configure
arguments to run into it. The above repro works on Linux,
though.)

thanks
-- PMM