--- boost_1_66_0/tools/build/src/tools/gcc.jam~ 2018-01-19 13:09:56.041685502 +0000

+++ boost_1_66_0/tools/build/src/tools/gcc.jam  2018-01-19 13:09:56.042685500 +0000

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

 rule set-address-model-options ( 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 ;