This section describes some important compiler options, and after a description of some important defaults, it describes choices you can make to improve:
If you want to ignore all the discussion below and blindly try to maximize compatibility at all costs, you should:
The rest of this section will describe these and other options in detail so that you can understand the consequences of your choices.
Note that you can also change the IBM defaults for the compiler option by running the job IBMZWIOP when you install the compiler or by applying a usermod to the module IBMZIOP after you have installed the compiler.