ORIGIN

   $(ORIGIN macro)

   Result is the origin of 'macro' as follows:

         "FILE"          defined in a description file
         "COMMAND LINE"  defined on the command line
         "SPECIAL"       a special macro
         "DEFAULT"       a default macro
         "CLI SYMBOL"    a CLI symbol
         "TEMPORARY"     defined by function FOREACH
         "UNDEFINED"     'macro' is not defined