Why does Oracle Database Client 12.1.0.2 32-bit fail or segfault on RHEL 7?

Issue

• Why does the 32 bit version of Oracle Database Client 12.1.0.2 fail to install on RHEL 7?

• Why does sqlplus in the 32 bit version of Oracle Database Client 12.1.0.2 segfault on RHEL 7?

  $ sqlplus /nolog
  Segmentation fault
  

• Not able to run 32 bit Oracle 12c client - Segmentation fault (core dumped).

  $ /u01/app/oracle/product/12.1.0/client_32/bin/sqlplus
  Segmentation fault (core dumped)
  $
  

• Problem with Oracle 12.1.0.2 Pro*C/C++ Precompiler.

  $ /opt/oracle/product/12.1.0/proc32/proc test
  Pro*C/C++: Release 12.1.0.2.0 - Production on So Jun 5 15:48:15 2016
  Copyright (c) 1982, 2014, Oracle and/or its affiliates.  All rights reserved.
  System-Standardoptionswerte aus: /opt/oracle/product/12.1.0/precomp/admin/pcscfg.cfg
  Segmentation fault