diff -urN a/library/Makefile b/library/Makefile
--- a/library/Makefile	2013-07-29 17:26:14.000000000 +0200
+++ b/library/Makefile	2013-07-29 17:26:58.000000000 +0200
@@ -26,7 +26,9 @@
 
 DLEXT=so
 # OSX shared library extension:
-# DLEXT=dylib
+ifdef DARWIN 
+DLEXT=dylib
+endif
 
 # Windows shared library extension:
 ifdef WINDOWS