diff -r 4b7e3d45ba4a vendor/boost/tools/build/v2/tools/darwin.jam
--- a/vendor/boost/tools/build/v2/tools/darwin.jam	Mon Nov 23 06:21:18 2009 +0000
+++ b/vendor/boost/tools/build/v2/tools/darwin.jam	Wed May 19 15:16:02 2010 -0400
@@ -468,14 +468,17 @@
     # The -F option specifies the directories where a framework
     # is searched for.  So, if we find <framework> feature
     # with some path, we need to generate property -F option.
-    local framework-path = [ on $(target) return $(FRAMEWORK:D) ] ;
+    local framework-paths = [ on $(target) return $(FRAMEWORK:D) ] ;
 
     # Be sure to generate no -F if there's no path.
+    for local framework-path in $(framework-paths)
+    {
     if $(framework-path) != ""
     {
         FRAMEWORK_PATH on $(target) += -F$(framework-path) ;
     }
 }
+}
 
 rule link ( targets * : sources * : properties * )
 {