-objs = $(patsubst source/%.cpp,temp/%.o,$(patsubst source/%.c,temp/%.o,$(1)))
-deps = $(patsubst source/%.cpp,temp/%.d,$(patsubst source/%.c,temp/%.d,$(1)))
-gen = $(patsubst source/%.t,gensrc/%,$(1))
+rename = $(addprefix $(1)/,$(addsuffix $(2),$(basename $(notdir $(3)))))
+objs = $(call rename,temp,.o,$(1))
+deps = $(call rename,temp,.d,$(1))
+gen = $(call rename,gensrc,,$(1))