# for each target.SRCS, generate target.OBJS, target.a and add target.OBJS to all
$(foreach V,$(filter %.SRCS, ${.VARIABLES}),\
	$(eval $(V:%.SRCS=%.OBJS) += $(foreach f,$($(V)),$(addsuffix .o,$(basename $(f))))) \
	$(eval $(V:%.SRCS=%.a): $($(V:%.SRCS=%.OBJS))) \
	$(eval all: $($(V:%.SRCS=%.OBJS))) \
)

# Suffix rules
%.a:
	@echo '  AR   $@'
	@${AR} ${ARFLAGS} $@ $(filter %.o,$^)

.SUFFIXES: .s .S .c .o
.s.o:
	@echo '  AS   $^'
	@$(AS) $(ASFLAGS) -c -o $@ $^

.S.o:
	@echo '  CC   $^'
	@$(CC) $(CCFLAGS) -c -o $@ $^

.c.o:
	@echo '  CC   $^'
	@$(CC) $(CCFLAGS) -c -o $@ $^

# Test rules
tst/test_%: tst/%.cc
	@echo '  CXX  $@'
	@${CXX} $< -o $@ $(GTEST) $(GMOCK)

# clean target
.PHONY: clean FORCE
clean:
	@$(foreach V,$(filter %.OBJS, ${.VARIABLES}), rm -rf $($(V)))
	@rm -rf tst/test_*

FORCE: