--- boost_1_58_0/tools/build/src/tools/gcc.jam~	2015-07-17 15:14:57.381636224 +0100

+++ boost_1_58_0/tools/build/src/tools/gcc.jam	2015-07-27 17:35:29.122264048 +0100

@@ -421,7 +421,9 @@

 rule setup-address-model ( targets * : sources * : properties * )

 {

-    local model = [ feature.get-values address-model : $(properties) ] ;

+    # For RPM builds the address model flag is passed in %{optflags}.

+    # local model = [ feature.get-values address-model : $(properties) ] ;

+    local model ;

     if $(model)

     {

         local option ;