+;; Cygwin
+;; #(CYGWIN_NT-5.1 Hostname 1.5.12(0.116/4/2) 2004-11-10 08:34 i686)
+;;
+;; Debian
+;; #(Linux hostname 2.4.27-1-686 #1 Fri Sep 3 06:28:00 UTC 2004 i686)
+;;
+;; Mingw
+;; #(Windows XP HOSTNAME build 2600 5.01 Service Pack 1 i686)
+;;
+(define PLATFORM
+ (string->symbol
+ (string-downcase
+ (car (string-tokenize (vector-ref (uname) 0) char-set:letter)))))
+
+(case PLATFORM
+ ((windows)
+ (define native-getcwd getcwd)
+ (define (slashify x)
+ (if (string-index x #\/)
+ x
+ (string-regexp-substitute "\\" "/" x)))
+ ;; FIXME: this prints a warning.
+ (define-public (ly-getcwd)
+ (slashify (native-getcwd))))
+ (else (define-public ly-getcwd getcwd)))
+
+(define-public (is-absolute? file-name)
+ (let ((file-name-length (string-length file-name)))
+ (if (= file-name-length 0)
+ #f
+ (or (eq? (string-ref file-name 0) #\/)
+ (and (eq? PLATFORM 'windows)
+ (> file-name-length 2)
+ (eq? (string-ref file-name 1) #\:)
+ (eq? (string-ref file-name 2) #\/))))))
+