Default Makefile

make's implicit rules and macro definitions are no longer hard-coded within the program itself. They are now contained in the default makefile /usr/share/lib/make/make.rules. make reads this file automatically unless there is a file in the local directory named make.rules. When you use a local make.rules file, you must add a directive to include the standard make.rules file to get the standard implicit rules and predefined macros.