+btrfs_debug_tree_objects = cmds-inspect-dump-tree.o
+btrfs_show_super_objects = cmds-inspect-dump-super.o
+btrfs_calc_size_objects = cmds-inspect-tree-stats.o
+
+# collect values of the variables above
+standalone_deps = $(foreach dep,$(patsubst %,%_objects,$(subst -,_,$(filter btrfs-%, $(progs)))),$($(dep)))