From 4684239efa63dc1b2c1cbe37ef7d3062029f5532 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 20 Feb 2017 00:05:40 -0800
Subject: Import Upstream version 3b1

---
 elk.init | 40 ++++++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 16 deletions(-)

(limited to 'elk.init')

diff --git a/elk.init b/elk.init
index e85a908..3021352 100644
--- a/elk.init
+++ b/elk.init
@@ -35,11 +35,15 @@
 ;;; (implementation-vicinity) should be defined to be the pathname of
 ;;; the directory where any auxillary files to your Scheme
 ;;; implementation reside.
-(define (implementation-vicinity)
-  (case (software-type)
-    ((unix)	 "/usr/share/elk/")
-    ((vms)	"scheme$src:")
-    ((ms-dos)	"C:\\scheme\\")))
+(define implementation-vicinity
+  (let ((impl-path
+	 (or (getenv "ELK_IMPLEMENTATION_PATH")
+	     (case (software-type)
+	       ((unix)	 "/usr/share/elk/")
+	       ((vms)	 "scheme$src:")
+	       ((ms-dos) "C:\\scheme\\")
+	       (else "")))))
+    (lambda () impl-path)))
 
 ;;; (library-vicinity) should be defined to be the pathname of the
 ;;; directory where files of Scheme library functions reside.
@@ -107,8 +111,7 @@
 ;@
 (define sub-vicinity
   (case (software-type)
-    ((vms) (lambda
-	       (vic name)
+    ((vms) (lambda (vic name)
 	     (let ((l (string-length vic)))
 	       (if (or (zero? (string-length vic))
 		       (not (char=? #\] (string-ref vic (- l 1)))))
@@ -148,6 +151,7 @@
 					;(SLIB:LOAD-COMPILED "filename")
 	vicinity
 	srfi-59
+	srfi-96
 
 		       ;; Scheme report features
    ;; R5RS-compliant implementations should provide all 9 features.
@@ -191,11 +195,11 @@
 
 			;; Other common features
 
-;;;	srfi				;srfi-0, COND-EXPAND finds all srfi-*
+;;;	srfi-0				;srfi-0, COND-EXPAND finds all srfi-*
 	sicp				;runs code from Structure and
 					;Interpretation of Computer
 					;Programs by Abelson and Sussman.
-;;;	defmacro			;has Common Lisp DEFMACRO
+	defmacro			;has Common Lisp DEFMACRO
 ;;;	record				;has user defined data structures
 	string-port			;has CALL-WITH-INPUT-STRING and
 					;CALL-WITH-OUTPUT-STRING
@@ -217,9 +221,9 @@
 
 ;------------
 
-(define program-arguments
-  (lambda ()
-    (cons "undefined-program-name" (command-line-args))))
+(define (program-arguments)
+  (cons (symbol->string (scheme-implementation-type))
+	(command-line-args)))
 
 ; EXACT? appears to always return #f which isn't very useful.
 ; Approximating it with INTEGER? at least means that some
@@ -352,10 +356,6 @@
 
 (define defmacro:eval slib:eval)
 (define defmacro:load load)
-;;; If your implementation provides R4RS macros:
-;(define macro:eval slib:eval)
-;(define macro:load load)
-;; slib:eval-load definition moved to "require.scm"
 
 (define slib:warn
   (lambda args
@@ -432,4 +432,12 @@
 ;;; At this point SLIB:LOAD must be able to load SLIB files.
 (define slib:load slib:load-source)	;WARNING: redefining LOAD
 
+;;; If your implementation provides R4RS macros:
+;;(define macro:eval slib:eval)
+;;(define macro:load slib:load-source)
+
+;;; If your implementation provides syntax-case macros:
+;;(define syncase:eval slib:eval)
+;;(define syncase:load slib:load-source)
+
 (slib:load (in-vicinity (library-vicinity) "require"))
-- 
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