Red Hat provides an official answer to this question here:

https://access.redhat.com/solutions/4966101

Ashwin Bhemidhi wrote:
>We run an in house developed application ( 3270 SNA controller) that
>needs the 31 bit libraries. The application was written in 'C'
>programming language couple of decades ago.

Is it feasible, and it would it make sense at least as a short-term 
measure, to statically link the (hopefully few) libraries you need? Of 
course there are a few disadvantages with static linking, notably that 
static linking puts you in the library maintenance business, for security 
patching for example. I'm assuming the libraries you need can still be 
compiled from source and linked in 31-bit mode.

Another possible avenue to explore is a "radical" one: what this 3270 SNA 
controller is actually doing. Typically it's been a long, long time since 
operating systems that support SNA such as z/OS have required separate, 
"off board" controllers/gateways. You can contact me directly if you'd 
like to discuss such possibilities.

- - - - - - - - - -
Timothy Sipples
I.T. Architect Executive
Digital Asset & Other Industry Solutions
IBM Z & LinuxONE
- - - - - - - - - -
E-Mail: sipp...@sg.ibm.com

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