I am more than a bit confused.  I know I saw an announcement that XLC 2.4.1 was 
available for download, but exactly which version is supplied in the z/OS 
PDSE's in an existing z/OS 2.4 environment?  Is this new XLC version available 
in Unix services shell environments only, or is a JCL/PDSE version also 
automatically available?

At what RSU level is XLC 2.4.1 already included for z/OS 2.4?  For z/OS 2.5?

If JCL/PDSE copies are not provided, what are C language developers in a 
JCL-only (no Unix) SDLC environment supposed to do to use the new version for 
their work?

Peter

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Phil Smith III
Sent: Monday, May 8, 2023 11:21 AM
To: [email protected]
Subject: Re: XLC - Weak symbols

Neale Ferguson wrote, in part:
>There's no #pragma weak in SC14-7308-40. What manual were you
>referencing? I am on V2.4.

SC31-5801-00, "Compiler Reference for XL C/C++ V2.4.1 for z/OS V2.4". Note the 
2.4.1. The compiler seems to have two versions, traditional (pre-2.4.1) and 
"Open" (2.4.1 and presumably later). The changes are significant, including 
defaults, which is.odd and painful and quite possibly dangerous. Surprising. 
We're using 2.4 as well, and keep tripping over stuff because we search and 
find the wrong page (the fact that IBM does zero SEO for this stuff doesn't 
help, either: even with "z/OS" in the search, results are often for AIX).

...phsiii (grumpy on a Monday morning)
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