[BUG] sandbox: './u-boot -l ' fails

[Heinrich Schuchardt]

Hello Simon,

when I try to run ./u-boot -l the sandbox stalls. Shouldn't it run out
of the box?

$ ./u-boot -l -d arch/sandbox/dts/sandbox.dtb

U-Boot 2020.10-rc4-00018-g21a10244f9-dirty (Sep 19 2020 - 19:55:39 +0200)

Model: sandbox
DRAM:  128 MiB

Warning: host_lo MAC addresses don't match:
Address in ROM is               26:4b:ca:6c:98:f4
Address in environment is       00:00:11:22:33:44

Warning: host_virbr0 MAC addresses don't match:
Address in ROM is               ee:3e:c9:ce:1f:9c
Address in environment is       00:00:11:22:33:45

Warning: host_docker0 MAC addresses don't match:
Address in ROM is               c2:85:07:7b:9a:18
Address in environment is       00:00:11:22:33:46
WDT:   Not found!
MMC:

No output after this point.

The problem also exists with U-Boot v2020.07, v2019.10, v2018.11.

CONFIG_SANDBOX_SDL=y

SDL_InitSubSystem() never returns. It is looping somewhere in U-Boot's
__serial_getc(). I wonder how it gets there without returning from the
function.

I compiled SDL2.cpp from
https://gist.github.com/miguelmartin75/6946310#file-sdl2-cpp-L18
with

g++ SDL2.cpp -D_REENTRANT -I/usr/include/SDL2 -lSDL2 -lGL -o test

and it runs fine showing an X11 windows with red background.

So there seems to be no general problem with the SDL2 library.

Best regards

Heinrich