tools/env: document current cross-compilation issues and workaround
Signed-off-by: Luca Ceresoli <luca.ceresoli@comelit.it>
diff --git a/tools/env/README b/tools/env/README
index 91e679a..d5f228f 100644
--- a/tools/env/README
+++ b/tools/env/README
@@ -2,6 +2,12 @@
This is a demo implementation of a Linux command line tool to access
the U-Boot's environment variables.
+In the current version, there is an issue in cross-compilation.
+In order to cross-compile fw_printenv, run
+ make HOSTCC=<your CC cross-compiler> env
+in the root directory of the U-Boot distribution. For example,
+ make HOSTCC=arm-linux-gcc env
+
For the run-time utiltity configuration uncomment the line
#define CONFIG_FILE "/etc/fw_env.config"
in fw_env.h.