If you plan to modify the values for compiler options and
compiler phases, use the IGYCOPT syntax format.
The IBM-supplied default values are shown both on the planning
worksheets and immediately following each syntax diagram. The
syntax diagrams also show the default as explained in How to read the syntax diagrams.
Compiler options and phases, and their defaults, are described
in the following information. Review these options and phases and
their default values to determine the values that are most suitable
for your applications. Figure 1. Syntax format for IGYCOPT compiler options and phases macro