Use execute_process instead of deprecated exec_program, and doesn't use unnecessary IS_SYMLINK.
Use execute_process instead of deprecated exec_program, and doesn't use unnecessary IS_SYMLINK.

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