[Gnash] SDL: required or suggested ?

[strk]

Gnash README file says:

 You'll also want the OpenGL development
 package and the SDL development packages installed as well.

And ./configure does not giveup if SDL is not found.
Anyway, build fails:

 sound_handler_sdl.cpp:11:23: SDL_mixer.h: No such file or directory
 sound_handler_sdl.cpp:23: error: `Mix_Chunk' was not declared in this scope

So, is SDL required (bug in ./configure) or no (bug in backend) ?

--strk;