Posted Sep 20, 2012 18:00 UTC (Thu) by Fats (subscriber, #14882)
Parent article: Throwing one away
"RHEL7 will have a great many incompatible changes from RHEL6"
Except for the time when thread implementation change I don't much incompatibilities between RHEL version. At our work place we have a bunch of programs compiler on RHEL3 that still run on newer versions if the proper compatbility lib is provided, most of the time older version of shared libs.