- ;; Read and validate implementation and version, or die.
- (let* ((implementation-length (read-arg 4))
- (implementation-string (make-string implementation-length))
- (ignore (read-string-as-bytes stream implementation-string))
- (implementation (keywordicate implementation-string))
- ;; FIXME: The logic above to read a keyword from the fasl file
- ;; could probably be shared with the read-a-keyword fop.
- (version (read-arg 4)))
- (declare (ignore ignore))
- (flet ((check-version (variant possible-implementation needed-version)
- (when (string= possible-implementation implementation)
- (unless (= version needed-version)
- (error "~@<~S is in ~A fasl file format version ~D, ~
- but this version of SBCL uses ~
- format version ~D.~:@>"
- stream
- variant
- version
- needed-version))
- t)))
- (or (check-version "native code"
- +backend-fasl-file-implementation+
- +fasl-file-version+)
- (check-version "byte code"
- (backend-byte-fasl-file-implementation)
- +fasl-file-version+)
- (error "~S was compiled for implementation ~A, but this is a ~A."
- stream
- implementation
- +backend-fasl-file-implementation+)))))))
+ ;; Read and validate version-specific compatibility stuff.
+ (flet ((string-from-stream ()
+ (let* ((length (read-arg 4))
+ (result (make-string length)))
+ (read-string-as-bytes stream result)
+ result)))
+ ;; Read and validate implementation and version.
+ (let* ((implementation (keywordicate (string-from-stream)))
+ ;; FIXME: The logic above to read a keyword from the fasl file
+ ;; could probably be shared with the read-a-keyword fop.
+ (version (read-arg 4)))
+ (flet ((check-version (variant
+ possible-implementation
+ needed-version)
+ (when (string= possible-implementation implementation)
+ (or (= version needed-version)
+ (error "~@<~S is in ~A fasl file format version ~W, ~
+ but this version of SBCL uses ~
+ format version ~W.~:@>"
+ stream
+ variant
+ version
+ needed-version)))))
+ (or (check-version "native code"
+ +backend-fasl-file-implementation+
+ +fasl-file-version+)
+ (error "~S was compiled for implementation ~A, ~
+ but this is a ~A."
+ stream
+ implementation
+ +backend-fasl-file-implementation+))))
+ ;; Read and validate *FEATURES* which affect binary compatibility.
+ (let ((faff-in-this-file (string-from-stream)))
+ (unless (string= faff-in-this-file *features-affecting-fasl-format*)
+ (error
+ "~@<incompatible ~S in fasl file ~S: ~2I~_~
+ Of features affecting binary compatibility, ~4I~_~S~2I~_~
+ this runtime has ~4I~_~A,~2I~_~
+ while the fasl expects ~4I~_~A.~:>"
+ '*features*
+ stream
+ *features-potentially-affecting-fasl-format*
+ *features-affecting-fasl-format*
+ faff-in-this-file)))
+ ;; success
+ t))))