patch 8.1.0391: building in a shadow directory fails commit https://github.com/vim/vim/commit/ac49f61a206217e94438b7b51bbfcae79b8a2a19 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Sep 15 15:08:52 2018 +0200 patch 8.1.0391: building in a shadow directory fails Problem: Building in a shadow directory fails. Solution: Don't link the xdiff directory but what's in it. (closes https://github.com/vim/vim/issues/3428)