--- configure.dt
+++ configure
@@ -24916,6 +24916,8 @@
 if test $platform_win32 = yes
 then :

+  HAVE_VISIBILITY_TRUE='#'
+  HAVE_VISIBILITY_FALSE=
 else case e in #(
   e)
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -fvisibility=hidden compiler flag" >&5