+PARENL :=(
+PARENR :=)
+
+dep_split=$(subst :,$(space),$(1))
+dep_rem=$(subst !,,$(subst $(strip $(PARENL)),,$(subst $(strip $(PARENR)),,$(word 1,$(call dep_split,$(1))))))
+dep_confvar=$(strip $(foreach cond,$(subst ||, ,$(call dep_rem,$(1))),$(CONFIG_$(cond))))
+dep_pos=$(if $(call dep_confvar,$(1)),$(call dep_val,$(1)))
+dep_neg=$(if $(call dep_confvar,$(1)),,$(call dep_val,$(1)))
+dep_if=$(if $(findstring !,$(1)),$(call dep_neg,$(1)),$(call dep_pos,$(1)))
+dep_val=$(word 2,$(call dep_split,$(1)))
+strip_deps=$(strip $(subst +,,$(filter-out @%,$(1))))
+filter_deps=$(foreach dep,$(call strip_deps,$(1)),$(if $(findstring :,$(dep)),$(call dep_if,$(dep)),$(dep)))
+