-;;; This value should be incremented when the system changes in such
-;;; a way that it will no longer work reliably with old fasl files.
-(defconstant +fasl-file-version+ 16)
-;;; 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
+;;; the code for a character which terminates a fasl file header
+(def!constant +fasl-header-string-stop-char-code+ 255)
+
+;;; This value should be incremented when the system changes in such a
+;;; way that it will no longer work reliably with old fasl files. In
+;;; practice, I (WHN) have often forgotten to increment it for CVS
+;;; versions which break binary compatibility. But it certainly should
+;;; be incremented for release versions which break binary
+;;; compatibility.
+(def!constant +fasl-file-version+ 74)
+;;; (description of versions before 0.9.0.1 deleted in 0.9.17)
+;;; 56: (2005-05-22) Something between 0.9.0.1 and 0.9.0.14. My money is
+;;; on 0.9.0.6 (MORE CASE CONSISTENCY).
+;;; 57: (2005-06-12) Raw slot rearrangement in 0.9.1.38
+;;; 58: (2005-08-16) Multiple incompatible changes between 0.9.3 and 0.9.3.60
+;;; 59: (2005-09-18) METAOBJECT implementation, removal of INSTANCE and
+;;; FUNCALLABLE-INSTANCE classes.
+;;; 60: (2005-10-24) Bumped for 0.9.6
+;;; 61: (2005-11-06) Improved source location recording added extra parameters
+;;; to multiple %DEFMUMBLE functions.
+;;; 62: (2005-12-30) Make the count of FASL header counted strings
+;;; a 32-bit value also on 64-bit platforms.
+;;; 63: (2006-01-27) Shuffle storage classes around to reduce the error
+;;; trap information size on RISCy platforms.
+;;; 64: (2006-03-24) New calling convention for unknown-values on x86 and
+;;; x86-64. Also (belatedly) PPC/gencgc, including :gencgc on FPAFF.
+;;; 65: (2006-04-11) Package locking interface changed.
+;;; 66: (2006-05-13) Fopcompiler
+;;; 67: (2006-07-25) Reports on #lisp about 0.9.13 fasls being invalid on
+;;; 0.9.14.something
+;;; 68: (2006-08-14) changed number of arguments of LOAD-DEFMETHOD
+;;; 69: (2006-08-17) changed validity of various initargs for methods
+;;; 70: (2006-09-13) changes to *PSEUDO-ATOMIC* on x86 and x86-64
+;;; 71: (2006-11-19) CLOS calling convention changes
+;;; 72: (2006-12-05) Added slot to the primitive function type
+;;; 73: (2007-04-13) Changed a hash function
+;;; 74: (2007-06-05) UNWIND-TO-FRAME-AND-CALL