doc: fix documentation of out-of-tree build
Correct environment variable for output directory is KBUILD_OUTPUT.
Signed-off-by: Timo Ketola <timo@exertus.fi>
diff --git a/doc/README.kwbimage b/doc/README.kwbimage
index 13f6f92..762b2e3 100644
--- a/doc/README.kwbimage
+++ b/doc/README.kwbimage
@@ -30,10 +30,10 @@
image that can be flashed on the board NAND/SPI flash. The make target
which uses mkimage to produce such an image is "u-boot.kwb". For example:
- export BUILD_DIR=/tmp/build
+ export KBUILD_OUTPUT=/tmp/build
make distclean
make yourboard_config
- make $BUILD_DIR/u-boot.kwb
+ make u-boot.kwb
Board specific configuration file specifications: