$(foreach class,$(classes), \
$(eval $(class)-srcs+= \
$$(subst $(top)/,, \
- $$(abspath $$(addprefix $(dir $(1)),$$($(class)-y)))))) \
+ $$(abspath $$(subst $(dir $(1))/,/,$$(addprefix $(dir $(1)),$$($(class)-y))))))) \
$(foreach special,$(special-classes), \
$(foreach item,$($(special)-y), $(call $(special)-handler,$(dir $(1)),$(item)))) \
$(eval subdirs+=$$(subst $(CURDIR)/,,$$(abspath $$(addprefix $(dir $(1)),$$(subdirs-y)))))