There was a post to ibm-main by Allan Kielstra of IBM compiler development (I
think) on May 10, 2017 (How are Program Object sections with Defer attribute
loaded?) that discusses how the writable static area (WSA) is used in COBOL V5
and COBOL V6. Briefly, this is how I understand it. If the "NOWSOPT" compiler
option is used (the default in COBOL V5) then all COBOL working-storage is
placed in the WSA. If the "WSOPT" compiler option is used then working-storage
is separately allocated upon initial entry to the program and the address of
the WS is placed in the WSA.
Hopefully I got that all right!
________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of
Farley, Peter x23353 <peter.far...@broadridge.com>
Sent: Wednesday, August 9, 2017 1:47 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: MSGIEW2678S Module contains one or more deferred classes
I also see this in COBOL V5.2 binder listings for various programs of different
types (sanitized):
CLASS C_WSA LENGTH = 194 ATTRIBUTES = MRG, DEFER , RMODE=ANY
OFFSET = 0 IN SEGMENT 002 ALIGN = DBLWORD
---------------
CLASS
OFFSET NAME TYPE LENGTH SECTION
0 $PRIV000012 PART 10
10 PROGNAME#S PART 184 PROGNAME
The names and lengths are consistent among multiple programs, so the compiler
must be doing something needing a WSA (Writable Static Area).
Perhaps Tom Ross could explain that part to us.
Peter
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Farley, Peter x23353
Sent: Wednesday, August 09, 2017 3:33 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: MSGIEW2678S Module contains one or more deferred classes
As I understand it, at least all debugging information (TEST option) is now
added as deferred data classes in the program object instead of being sent to a
separate dataset at compile time.
The COBOL Pgmr's Guide says to totally eliminate TEST data use NOTEST(NODWARF).
Not sure if that eliminates all deferred classes though.
HTH
Pe6ter
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Giliad Wilf
Sent: Wednesday, August 09, 2017 2:36 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: MSGIEW2678S Module contains one or more deferred classes
On Wed, 9 Aug 2017 13:37:54 -0400, Tony Harminc <t...@harminc.net> wrote:
>
>And the resulting IEW2678S makes sense in that context, because there
>is nowhere known to IEWBLODI for the deferred classes to be loaded
>from. So asking IBM to support deferred classes in IEWBLODI (or
>IEWBLOAD, which is the same thing except without the IDENTIFY), makes
>little sense. What might make sense would be an option on these two
>functions to force all deferred classes to be loaded at the same time
>as the non-deferred ones.
>
>And of course as John M points out, building the PO in a temporary
>dataset (or one or more UNIX files...?) would be about as easy, would
>perform almost as well, and sounds as though it would accomplish
>what's needed.
>
>Tony H.
>
Can you suggest why, and what for, does Ent. COBOL V5.1 for z/OS generate
deferred data class(es) at all?
Is this being controlled by some compiler option that can be negated?
Obviously, Ent. COBOL V4.2 for z/OS does not do this.
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