The IBM.PPMACRO environment variable specifies the macro facility option settings. For example:
set ibm.ppmacro=xref print
The syntax of the character string you assign to the IBM.PPMACRO environment variable is the same as that required for the compile-time options specified on the PLI command (see Using the PLI command to invoke the compiler).
The defaults together with the changes you apply using this environment variable become the new defaults. Any options you specify on the PP(MACRO) option in the IBM.OPTIONS environment variable or the PLI command or in your source program override these defaults.