$NetBSD: patch-bb,v 1.4 2017/05/15 08:40:21 spz Exp $

--- configure.ac.orig	2017-04-23 23:46:28.000000000 +0000
+++ configure.ac
@@ -308,6 +308,7 @@ case "$host_os" in mingw*)
          # TODO: that is for backward compatibility only
       fi
     fi
+    ZZIPLIB_LDFLAGS="${EXPORT_SYMBOLS_LDFLAGS}"
     RESOLVES=" # "
 ;; esac
 AC_MSG_RESULT([$ZZIPLIB_LDFLAGS $RESOLVES])
