+ ;; meaning: The #'COMPILE-STEM argument :TRACE-FILE should be T.
+ ;; When the compiler is SBCL's COMPILE-FILE or something like it,
+ ;; compiling "foo.lisp" will generate "foo.trace" which contains lots
+ ;; of exciting low-level information about representation selection,
+ ;; VOPs used by the compiler, and bits of assembly.
+ :trace-file