On Wed, 14 May 2014 17:07:00 -0400, Robert A. Rosenberg wrote:

>By having a
>dummy macro under the Operating System FMID (and supplying a SUPing
>copy of the Macro in the Component) ...

It is possible to do that, not with SUP, but with VERSION. Doing so leads to 
other complications. It only works if DB2 is installed in the same target zone. 
That in turn requires that DB2 be reinstalled with each new version of the 
operating system.

There are different complications when DB2 is installed in a different target 
zone than z/OS. If both products install the macro in SYS1.MACLIB, the 
effect is that the macro is updated outside of SMP/E with respect to the 
z/OS target zone. It gets worse if there are two versions of DB2 installed.

If DB2 installs it in a different target library, care must be taken by all 
users 
of the macro to concatenate the DB2 MACLIB ahead of the z/OS MACLIB. 

-- 
Tom Marchant

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