--- boost_1_35_0/tools/build/v2/tools/gcc.jam	2008-03-15 19:55:28.000000000 +0100
+++ boost_1_35_0-gil/tools/build/v2/tools/gcc.jam	2008-07-21 12:04:56.000000000 +0200
@@ -284,8 +284,8 @@
 
 # Declare flags and action for compilation
 flags gcc.compile OPTIONS <optimization>off   : -O0 ;
-flags gcc.compile OPTIONS <optimization>speed : -O3 ;
-flags gcc.compile OPTIONS <optimization>space : -Os ;
+flags gcc.compile OPTIONS <optimization>speed : -O3 -fno-strict-aliasing ;
+flags gcc.compile OPTIONS <optimization>space : -Os -fno-strict-aliasing ;
 
 flags gcc.compile OPTIONS <inlining>off  : -fno-inline ;
 flags gcc.compile OPTIONS <inlining>on   : -Wno-inline ;