sandbox: Add instructions about building on 32-bit machines
Sandbox is built with 64-bit ints by default. This doesn't work properly on
32-bit machines.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/sandbox/README.sandbox b/board/sandbox/README.sandbox
index 9fe3bf1..ed820d3 100644
--- a/board/sandbox/README.sandbox
+++ b/board/sandbox/README.sandbox
@@ -44,6 +44,9 @@
make sandbox_defconfig all NO_SDL=1
./u-boot
+ If you are building on a 32-bit machine you may get errors from __ffs.h
+ about shifting more than the machine word size. Edit the config file
+ include/configs/sandbox.h and change CONFIG_SANDBOX_BITS_PER_LONG to 32.
U-Boot will start on your computer, showing a sandbox emulation of the serial
console: