Understanding makefile considerations in Source Code Control Systems (SCCS)

If you specify a description file, or a file named makefile or Makefile is in the current directory, the make command does not look for a description file within SCCS.

If a description file is not in the current directory and you enter the make command, the make command looks for an SCCS file named either s.makefile or s.Makefile. If either of these files is present, the make command uses a get command to direct SCCS to build the description file from that source file. When the SCCS generates the description file, the make command uses the file as a normal description file. When the make command finishes executing, it removes the created description file from the current directory.