-(defconstant +fasl-file-version+ 23)
-;;; 2 = sbcl-0.6.4 uses COMPILE-OR-LOAD-DEFGENERIC.
-;;; 3 = sbcl-0.6.6 uses private symbol, not :EMPTY, for empty HASH-TABLE slot.
-;;; 4 = sbcl-0.6.7 uses HAIRY-DATA-VECTOR-REF and HAIRY-DATA-VECTOR-SET
-;;; when array headers or data element type uncertainty exist, and
-;;; uses DATA-VECTOR-REF and DATA-VECTOR-SET only for VOPs. (Thus,
-;;; full calls to DATA-VECTOR-REF and DATA-VECTOR-SET from older
-;;; fasl files would fail, because there are no DEFUNs for these
-;;; operations any more.)
-;;; 5 = sbcl-0.6.8 has rearranged static symbols.
-;;; 6 = sbcl-0.6.9, got rid of non-ANSI %DEFCONSTANT/%%DEFCONSTANT stuff
-;;; and deleted a slot from DEBUG-SOURCE structure.
-;;; 7 = around sbcl-0.6.9.8, merged SB-CONDITIONS package into SB-KERNEL
-;;; 8 = sbcl-0.6.10.4 revived Gray stream support, changing stream layouts.
-;;; 9 = deleted obsolete CONS-UNIQUE-TAG bytecode in sbcl-0.6.11.8
-;;; (somewhere in here also changes to AND and OR CTYPE layouts)
-;;; 10 = new layout for CONDITION in sbcl-0.6.11.38
-;;; 11 = (a) new helper functions for MAKE-LOAD-FORM (HASH-TABLE) in
-;;; sbcl-0.6.12.11
-;;; (b) new address space constants for OpenBSD in 0.6.12.17
-;;; (doesn't need separate version from (a) because the
-;;; OpenBSD port was broken from sometime before 0.6.12.11
-;;; until the address space was changed)
-;;; 12 = sbcl-0.6.12.22 added new SB-FASL package
-;;; 13 = sbcl-0.6.12.28 removed some elements from *STATIC-SYMBOLS*
-;;; 14 = sbcl-0.6.12.29 removed more elements from *STATIC-SYMBOLS*
-;;; 15 = sbcl-0.6.12.33 changed the layout of STREAM
-;;; 16 = sbcl-0.pre7.15 changed the layout of PRETTY-STREAM
-;;; 17 = sbcl-0.pre7.38 (merging many changes accumulated in
-;;; the sbcl-0.pre7.37.flaky5.* branch back into the main branch)
-;;; got rid of byte compiler, byte interpreter, and IR1
-;;; interpreter, changed %DEFUN and DEFSTRUCT, changed the
-;;; meaning of FOP-FSET, and changed the layouts of various
-;;; internal compiler structures (e.g. DEFSTRUCT CLAMBDA)
-;;; 18 = sbcl-0.pre7.39 swapped FUNCTION-POINTER-TYPE and
-;;; INSTANCE-POINTER-LOWTAG low-level type codes to help with
-;;; the PPC port
-;;; (In 0.pre7.48, the low-level object layout of SYMBOL on the
-;;; non-X86 ports changed. I forgot to bump the fasl version number:
-;;; I only have an X86.. -- WHN)
-;;; 19 = sbcl-0.pre7.50 deleted byte-compiler-related low-level type codes
-;;; 20 = sbcl-0.pre7.51 modified names and layouts of
-;;; physical-environment-related structures in the compiler
-;;; 21 = sbcl-0.pre7.62 finally incremented the version after several
-;;; incompatible changes in earlier versions: many many symbols
-;;; renamed, changes in globaldb representation of constants
-;;; and inline functions, and change in the value of
-;;; INTERNAL-TIME-UNITS-PER-SECOND
-;;; 22 = about a zillion changes between sbcl-0.pre7.62 and
-;;; sbcl-0.pre7.133, during which time it seemed too much
-;;; trouble to increment the counter
-;;; 23 = sbcl-0.7.0.1 deleted no-longer-used EVAL-STACK stuff,
-;;; causing changes in *STATIC-SYMBOLS*.