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Compatibility with Microsoft's NMAKE
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Use the -N option if you want to use makefiles that were originally
created for Microsoft's NMAKE. The following changes occur when you
use -N:

  MAKE interprets the << operator like the && operator: temporary files
  are used as response files, then deleted. To keep a file, either use
  the -K command-line option or use KEEP in the makefile.

        <<TEMPFILE.TXT!
        text

        !KEEP

  If you don't want to keep a temporary file, type NOKEEP or type
  only the temporary file name. If you use NOKEEP with a temporary
  file, then use the -K option with MAKE, MAKE deletes the temporary file.

  o  The $d macro is treated differently. Use "!ifdef" or "!ifndef" instead.

  o  Macros that return paths won't return the last \. For example, if
     $(<D) normally returns C:\CPP\, the -N option makes it return C:\CPP.

  o  Unless there's a matching .suffixes directive, MAKE searches rules
     from bottom to top of the makefile.

  o  The $* macro always expands to the target name instead of the
     dependent in an implicit rule.