ArcSDE should support zlinux (SLES or RHEL for System z, IBM Mainframe)

Does anyone have any idea about when or why not ArcSDE would be certified on zlinux (SLES or RHEL).
Now, ArcSDE is only supported linux on:
Linux x86, on CPUs that adhere to the x86 architecture (32-bit), with supported Linux releases
Linux x86_64, on CPUs that adhere to the x86_64 architecture (64-bit), with supported Linux releases

Now, my real question is:
Can I use
Oracle db server(zlinux, SLES11SP2 for mainframe, Oracle 11gr2) + Arcgis server(windows) + APP server(windows or linux, weblogic) to deliver a three-layers application architecture for an GIS system.

Someone told me it's impossible because the ArcSDE is not certified on zlinux, there are 3 lib file should be put into the Oracle db lib link:
libst_shapelib.so
libpe.so
libsg.so

Is this true?