"darwin" is no longer hardcoded in lib/ypsilon-compat.ikarus.ss,

instead, it is obtained from the target info that autoconf
generates.

lib/ypsilon-compat.ikarus.ss

@@ -25,9 +25,7 @@
 
   (define (architecture-feature what)
     (case what
-      [(operating-system) "darwin"]
-      [(alignof:int)             4]
-      [(sizeof:int)              4]
+      [(operating-system) (host-info)]
       [else (error 'architecture-feature "invalid args" what)]))
 
   (define (string-contains text s)

scheme/Makefile.am

@@ -41,6 +41,7 @@ ikarus.config.ss: Makefile last-revision ../config.h
 	echo '(define ikarus-version "$(PACKAGE_VERSION)")' >$@
 	echo '(define ikarus-revision "$(shell cat last-revision)")' >>$@
 	echo '(define ikarus-lib-dir "$(pkglibdir)")' >>$@
+	echo '(define target "$(target)")' >>$@
 	echo '(define wordsize $(sizeofvoidp))' >>$@
 
 

scheme/Makefile.in

@@ -380,6 +380,7 @@ ikarus.config.ss: Makefile last-revision ../config.h
 	echo '(define ikarus-version "$(PACKAGE_VERSION)")' >$@
 	echo '(define ikarus-revision "$(shell cat last-revision)")' >>$@
 	echo '(define ikarus-lib-dir "$(pkglibdir)")' >>$@
+	echo '(define target "$(target)")' >>$@
 	echo '(define wordsize $(sizeofvoidp))' >>$@
 
 ikarus.boot: $(EXTRA_DIST) ikarus.config.ss

scheme/ikarus.main.ss

@@ -19,10 +19,12 @@
 ;;; libraries within the compiler itself.
 
 (library (ikarus startup)
-  (export print-greeting init-library-path)
-  (import (ikarus))
+  (export print-greeting init-library-path host-info)
+  (import (except (ikarus) host-info))
   (include "ikarus.config.ss")
 
+  (define (host-info) target)
+  
   (define (print-greeting)
     (printf "Ikarus Scheme version ~a\n" 
       (if (zero? (string-length ikarus-revision))

scheme/last-revision

@@ -1 +1 @@
-1610
+1612

scheme/makefile.ss

@@ -1478,6 +1478,7 @@
     [pointer-set-long   $for]
     [make-ffi           $for]
     [make-callback      $for]
+    [host-info            i]
 
   ))