Required LD_PRELOAD settings for CS Linux

Answer

Set the LD_PRELOAD environment variable for some applications or TPs to run properly with CS Linux:

For example a 32bit JavaCPI-C application must have the following set before the 32bit Java Runtime Environment (JRE) is started:

   LD_PRELOAD=/usr/lib/libpLiS.so


For a 64-bit application you might need:

   LD_PRELOAD=/usr/lib64/libpLiS.so


Do not export or put the LD_PRELOAD environment variable into the system profile, especially on 64-bit (s390x, ppc64, and x86_64) systems.  Issuing the following command sets the value for all subsequent commands. 

   export LD_PRELOAD=...

This can cause problems if LD_PRELOAD is pointing to a 32-bit library but a subsequent command is a 64-bit binary or visa-versa.  In that case, use the following syntax to only set the LD_PRELOAD environment variable for that binary:

   LD_PRELOAD=/usr/lib/libpLiS.so 32bitbinaryname
or
   LD_PRELOAD=/usr/lib64/libpLiS.so 64bitbinaryname

On a Linux s390x system the default shell ('/bin/bash') is a 64-bit binary, so issuing 'export LD_PRELOAD=32bitlibrary' causes all the subsequent shell commands to fail.  Issue the following command to recover:

   unset LD_PRELOAD