-;;; KLUDGE: this is set up automatically in #!-SB-THREAD builds by the
-;;; :SET-TRANS thing in objdef.lisp. However, for #!+SB-THREAD builds
-;;; we need to use a special VOP, so we have to do this by hand.
-;;; -- CSR, 2003-05-08
-#!+sb-thread
+;;; :SET-TRANS (in objdef.lisp DEFINE-PRIMITIVE-OBJECT) doesn't quite
+;;; cut it for symbols, where under certain compilation options
+;;; (e.g. #!+SB-THREAD) we have to do something complicated, rather
+;;; than simply set the slot. So we build the IR2 converting function
+;;; by hand. -- CSR, 2003-05-08