You are misunderstanding. My concern, and I admit its a small one, is about those programs that were tested prior to the version upgrade but implemented after the version upgrade. Meaning they were tested having been compiled with V6.2, but compiled for implementation using V6.3. It's a short window where that would happen, so probably not worth fretting about.
________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Charles Mills <charl...@mcn.org> Sent: Tuesday, January 14, 2020 3:52 PM To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> Subject: Re: Migrating to new compiler release I think we are getting into "how many compiler developers can dance on the head of a pin?" territory here. I stand by my original answer: - Yes, be prudent. There are old sysprogs and there are bold sysprogs but there are no old, bold sysprogs. - I would be surprised if there were any reasons why having 6.3 installed would affect how 6.2-compiled programs would run. I would be really surprised if such reasons existed and they could not be quickly fixed by APAR and PTF. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Frank Swarbrick Sent: Tuesday, January 14, 2020 1:58 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Migrating to new compiler release I disagree with that. A new version may simply be new features, none affecting any features the old version supported. ________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Charles Mills <charl...@mcn.org> Sent: Tuesday, January 14, 2020 2:09 PM To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> Subject: Re: Migrating to new compiler release > My question has to do with the (probably slight) possibility that the code generated by one compiler would be different, for the same statement, for another. It certainly would. If the code generated for every statement was the same for both compilers, then there would be no difference between the two. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Frank Swarbrick Sent: Tuesday, January 14, 2020 11:37 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Migrating to new compiler release I understand that the runtime is part of LE, and is generally shared between versions (at least V5 and V6 seem to share the same runtime for many/most functions). Conceivably it's still possible that the code generated by a certain version of a compiler may have defects. Probably less likely if the code is in a pre-existing feature. My question has to do with the (probably slight) possibility that the code generated by one compiler would be different, for the same statement, for another. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
