cms-sw/cmssw — pull request #3734 by Dr15Jones (2014-05-08 00:02:57+00:00)
Title: Make KfComponentsHolder thread safe

Valgrind report was complaining about multiple threads changing a dummy function static simultaneously. Fix was to make it thread_local. However, thread_local is not parseable by gccxml so changed TrackingRecHit.h to only forward declare KfComponentsHolder.
Discovered that way to much of CMSSW depends on TrackingRecHit.h.