Re: compiling an RPGLE pgm

[Barbara Morris <bmorris@xxxxxxxxxx>]

Joel Fritz wrote:
> 
> I'll admit it, I was guessing--one class in 8086 Assembler probably doesn't
> make me a compiler expert. <g>  I didn't mean to imply that OPM and ILE used
> different static memory models.  I didn't realize that dynamic memory
> allocation was available in OPM.
> 
> I'm curious if the following is a good description of static data in both
> OPM and ILE:
> Constants, global variables (including file fields,) compile time array
> data.
> 
> The OPM use of automatic storage is interesting too.
> 

Joel, by "OPM", do you mean DFTACTGRP(*YES) programs?  If so, I wouldn't
use the term that way - maybe "OPM equivalent" would be better.  "Real"
OPM RPG (RPG III) doesn't have dynamic memory allocation and if I recall
correctly, the OPM RPG compiler doesn't generate any automatic variables
(but it could - OPM CL does).

For any RPG program, RPG III or RPG IV, static data includes global
variables, and many internal control structures.  For ILE RPG programs
with subprocedures, it also includes local variables defined with
STATIC.  For RPG IV programs (both flavours of dftactgrp) I don't think
constants (including compile-time data) is part of the static data.  If
you display an ILE module or program (any language), there's an item
called the "String Directory".  I'm pretty sure this is where the
constants are.  I have no idea what kind of storage is used.