CPPFLAGS ?= -Werror -Wall -std=c99

program = test
sources = $(wildcard *.c)
objects = $(sources:%.c=%.o)
depends = $(sources:%.c=%.d)

%.d: %.c
	@$(CPP) $(CPPFLAGS) -c -MP -MM -MT "$@ $*.o" $< >$@

$(program): $(objects)
	$(CXX) -o $@ $^ $(LDFLAGS) $(LDLIBS)

.PHONY: clean
clean:
	rm -f $(program) $(objects) $(depends)

ifneq ($(MAKECMDGOALS),clean)
-include $(depends)
endif