[LEDE-DEV] ImageBuilder ar71xx BIN_DIR issue

[Nemesis]

Hi everybody,

today we started testing lede-17.01 for OpenWISP.org and we noticed a
strange issue with the image-generator.

We supply a command like:

make image PROFILE="Default" BIN_DIR="$BIN_DIR"

but the image building fails because something goes to look for binaries
in ./bin/targets/ar71xx/generic instead of
"$BIN_DIR/targets/ar71xx/generic".

If we create manually the dir with:

mkdir ./bin/targets/ar71xx/generic

The image building procedure completes successfully.

Is this desired behaviour or not?

Regards
Federico