--- gcc-4.8.5/gcc/config.host.orig	2017-02-10 20:45:10.425515700 -0800
+++ gcc-4.8.5/gcc/config.host	2017-02-10 20:47:33.935525500 -0800
@@ -214,7 +214,7 @@
         ;;
     esac
     ;;
-  i[34567]86-*-cygwin*)
+  i[34567]86-*-cygwin* | x86_64-*-cygwin*)
     host_xm_file=i386/xm-cygwin.h
     out_host_hook_obj=host-cygwin.o
     host_xmake_file="${host_xmake_file} i386/x-cygwin"