fcn_src2obj = $(call fcn_mkobj, $(call fcn_src2obj_int,$1))
fcn_obj2src = $(subst $(OBJECT_DIR),$(SOURCE_DIR),$(patsubst %$(OBJECT_SUFFIX).o,%,$1))
fcn_src2obj = $(call fcn_mkobj, $(call fcn_src2obj_int,$1))
fcn_obj2src = $(subst $(OBJECT_DIR),$(SOURCE_DIR),$(patsubst %$(OBJECT_SUFFIX).o,%,$1))