r26255 is forcing the use of __malloc_hook which is implemented in opal/mca/memory/linux however that is not compiled in the library when built on Solaris thus causing a referenced symbol not found when libmpi tries to load the openib btl. 

I am looking how to fix this now but if someone has a good idea how to detect when __malloc_hook is used (or not) I'd be interested in hearing it. 

Terry D. Dontje | Principal Software Engineer
Developer Tools Engineering | +1.781.442.2631
Oracle - Performance Technologies
95 Network Drive, Burlington, MA 01803
Email terry.dontje@oracle.com