Index: tools/build/v2/tools/python.jam
===================================================================
--- tools/build/v2/tools/python.jam (revision 57846)
+++ tools/build/v2/tools/python.jam (working copy)
@@ -976,7 +976,7 @@
     # the Python framework, even when building extensions. Note that framework
     # builds of Python always use shared libraries, so we do not need to worry
     # about duplicate Python symbols.
-    if $(target-os) in windows cygwin darwin
+    if $(target-os) in windows cygwin
     {
         alias python_for_extensions : python : $(target-requirements) ;
     }
Index: tools/build/v2/tools/darwin.jam
===================================================================
--- tools/build/v2/tools/darwin.jam (revision 57846)
+++ tools/build/v2/tools/darwin.jam (working copy)
@@ -465,7 +465,7 @@
 }
 
 # Set the max header padding to allow renaming of libs for installation.
-flags darwin.link.dll OPTIONS : -headerpad_max_install_names ;
+flags darwin.link.dll OPTIONS : -headerpad_max_install_names -undefined dynamic_lookup ;
 
 # To link the static runtime we need to link to all the core runtime libraries.
 flags darwin.link OPTIONS <runtime-link>static