X-Git-Url: http://git.lukelau.me/?a=blobdiff_plain;f=main.scm;h=ce9241ac11537abaf0766e6876e138b24645efd3;hb=91145e54f41ee88f1e279a80430b3f5ed4e7a8c6;hp=29c03e5c9c6cfc8a97e63cd44f2d0b16aff5e9eb;hpb=05e0f42eb4a44694b96297ce50b5a27eb6bb9f71;p=scheme.git

diff --git a/main.scm b/main.scm
index 29c03e5..ce9241a 100644
--- a/main.scm
+++ b/main.scm
@@ -1,6 +1,34 @@
 (load "codegen.scm")
 
+; returns (os filename)
+(define (parse-args)
+  (define (parse-os x)
+    (if (null? x) 'darwin ; todo: replace this with the os
+					; it was compiled with
+	(if
+	 (or (equal? (car x) "-t")
+	     (equal? (car x) "--target"))
+	 (case (cadr x)
+	   ("darwin" 'darwin)
+	   ("linux"  'linux)
+	   (else (error #f "unknown os")))	   
+	 (parse-os (cdr x)))))
+  (define (parse-file x)
+    (if (null? x) 'stdin
+	(if
+	 (or (equal? (car x) "-t")
+	     (equal? (car x) "--target"))
+	 (parse-file (cddr x))
+	 (car x))))
+  (let ((args (cdr (command-line))))
+    (list (parse-os args) (parse-file args))))
+
+
+(define target (car (parse-args)))
+(define file (cadr (parse-args)))
+
 (compile-to-binary
- (if (>= (length (command-line)) 1)
-     (call-with-input-file (cadr (command-line)) read)
-     (read)))
+ (if (eqv? file 'stdin)
+     (read)
+     (call-with-input-file file read))
+ "a.out" target)