--- boost_1_45_0.orig/tools/build/v2/tools/darwin.jam	2010-07-12 02:37:43.000000000 -0500
+++ boost_1_45_0/tools/build/v2/tools/darwin.jam	2011-11-07 12:22:06.000000000 -0600
@@ -482,7 +482,7 @@
 flags darwin.compile OPTIONS <link>shared : -dynamic ;
 
 # Misc options.
-flags darwin.compile OPTIONS : -no-cpp-precomp -gdwarf-2 ;
+flags darwin.compile OPTIONS : -gdwarf-2 ;
 
 # Add the framework names to use.
 flags darwin.link FRAMEWORK <framework> ;