tree e1a888afe82b62afcf2fabe0401b0c002fb41942
parent bda7773f044a13cf69cbbcb016285dd217b981c3
author Simon Glass <sjg@chromium.org> 1393532777 -0700
committer Simon Glass <sjg@chromium.org> 1395108348 -0600

sandbox: Add SDL library for LCD, keyboard, audio

SDL (Simple DirectMedia Layer - see www.libsdl.org) is a library which
provides simple graphics and sound features. It works under X11 and also
with a simple frame buffer interface. It is ideally suited to sandbox
U-Boot since it fits nicely with the low-level feature set required by
U-Boot. For example, U-Boot has its own font drawing routines, its own
keyboard processing and just needs raw sound output.

We can use SDL to provide emulation of these basic functions for sandbox.
This significantly expands the testing that is possible with sandbox.

Add a basic SDL library which we will use in future commits.

Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>