Planning to modify compiler option default values
Compiler option defaults and residency for compiler phases are set in the IGYCDOPT program.
IGYCDOPT is link-edited with AMODE 31 and RMODE ANY during installation.
For compiler option defaults and residency for compiler phases set in the IGYCDOPT program, see IGYCDOPT worksheet for options and IGYCDOPT program worksheet for compiler phases, respectively.
When you assemble COBOL customization parts, such as IGYCDOPT,
you need access to a system MACLIB. Typically, the MACLIB is found
in SYS1.MACLIB. You also need access to the COBOL MACLIB IGY.V6R2M0
.SIGYMAC.
The IGYCDOPT program has two purposes: it lets you select and fix the defaults for compiler options, and specify which compiler phases are in shared storage. You can accept the IBM-supplied compiler option values when you install Enterprise COBOL, or you can modify them to better suit the needs of programmers at your location. You can also choose whether your application programmers will have the ability to override these options.


If you identify compiler phases that reside in shared system storage, the compiler can use the storage in the region for work areas. For a more detailed description of why you might want to modify the phase defaults, see Why place the compiler phases in shared storage?.