SRCS = a.c

depend: .depend

.depend: $(SRCS)
        rm -f ./.depend
        $(CC) $(CFLAGS) -MM $^ -MF  ./.depend;

include .depend


# -MM outputs source file header dependecies, excluding system headers;
# the output syntax is the preprocessor syntax that make can use to define
# all source file dependencies, and that is why it's included at the end

# -MF specifies the file to output to when used with -MM