Add support for Clang compiler in deprecated.h
Add support for Clang compiler in deprecated.h

mamoll/fcl,hsu/fcl,mamoll/fcl,EdsterG/fcl,mamoll/fcl,EdsterG/fcl,hsu/fcl,uschwes/fcl,uschwes/fcl,hsu/fcl,uschwes/fcl,EdsterG/fcl