X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fearly-fasl.lisp;h=30bcfd0fd07a06106b88419ce2b0f8f084353518;hb=2f2fad31a662b5387376003fab7ef328b4ac9063;hp=6defa1c625afefc2671dd3301564515f3f6ea88d;hpb=aca45f35fc54bc29e2c79397e3538ff27f6e0db9;p=sbcl.git

diff --git a/src/code/early-fasl.lisp b/src/code/early-fasl.lisp
index 6defa1c..30bcfd0 100644
--- a/src/code/early-fasl.lisp
+++ b/src/code/early-fasl.lisp
@@ -33,23 +33,57 @@
 ;;;   against.
 (defparameter *fasl-header-string-start-string* "# FASL")
 
+(macrolet ((define-fasl-format-features ()
+             (let (;; master value for *F-P-A-F-F*
+		   (fpaff '(:sb-thread)))
+	       `(progn
+		  ;; a list of *(SHEBANG-)FEATURES* flags which affect
+		  ;; binary compatibility, i.e. which must be the same
+		  ;; between the SBCL which compiles the code and the
+		  ;; SBCL which executes the code
+		  ;;
+		  ;; This is a property of SBCL executables in the
+		  ;; abstract, not of this particular SBCL executable, 
+		  ;; so any flag in this list may or may not be present
+		  ;; in the *FEATURES* list of this particular build.
+		  (defparameter *features-potentially-affecting-fasl-format*
+		    ',fpaff)
+		  ;; a string representing flags of *F-P-A-F-F* which
+		  ;; are in this particular build
+		  ;;
+		  ;; (A list is the natural logical representation for
+		  ;; this, but we represent it as a string because
+		  ;; that's physically convenient for writing to and
+		  ;; reading from fasl files, and because we don't
+		  ;; need to do anything sophisticated with its
+		  ;; logical structure, just test it for equality.)
+		  (defparameter *features-affecting-fasl-format*
+		    ,(let ((*print-pretty* nil))
+		       (prin1-to-string
+			(sort
+			 (copy-seq
+			  (intersection sb-cold:*shebang-features* fpaff))
+			 #'string<
+			 :key #'symbol-name))))))))
+  (define-fasl-format-features))
+	   
 ;;; the code for a character which terminates a fasl file header
-(defconstant +fasl-header-string-stop-char-code+ 255)
+(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) fairly often neglect to increment it for CVS
+;;; 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.
-(defconstant +fasl-file-version+ 25)
-;;; (record of versions before 0.7.0 deleted in 0.7.1.41)
-;;; 23 = sbcl-0.7.0.1 deleted no-longer-used EVAL-STACK stuff,
-;;;      causing changes in *STATIC-SYMBOLS*.
-;;; 24 = sbcl-0.7.1.19 changed PCL service routines which might be
-;;;      called from macroexpanded code
-;;; 25 = sbcl-0.7.1.41 (and immediately preceding versions, actually)
-;;;      introduced new functions to check for control stack exhaustion
+(def!constant +fasl-file-version+ 41)
+;;; (record of versions before 2003 deleted in 2003-04-26/0.pre8.107 or so)
+;;; 38: (2003-01-05) changed names of internal SORT machinery
+;;; 39: (2003-02-20) in 0.7.12.1 a slot was added to
+;;;     DEFSTRUCT-SLOT-DESCRIPTION
+;;; 40: (2003-03-11) changed value of (SXHASH NIL)
+;;; 41: (2003-04-26) enforced binary incompatibility between +SB-THREAD
+;;;     and -SB-THREAD builds
 
 ;;; the conventional file extension for our fasl files
 (declaim (type simple-string *fasl-file-type*))