The /DEFINE compiler directive defines conditions for conditional compilation. The entries in the condition-name area are free-format (do not have to be left justified).
/DEFINE must be followed by at least one space, and then
the condition-name must be specified on the same line.
The remainder of the line must be blank.
See Compiler Directives for information on
the columns available for directives.
/DEFINE cannot be specified within
a free-form statement.