define find-subdir-assets
$(sort $(if $(1),$(patsubst ./%,%, \
$(shell if [ -d $(1) ] ; then cd $(1) ; find -L ./ -not -name '.*' -and -type f -and -not -type l ; fi)), \
- $(warning Empty argument supplied to find-subdir-assets) \
+ $(warning Empty argument supplied to find-subdir-assets in $(LOCAL_PATH)) \
))
endef