patch 8.0.1717: C89 check causes too much trouble commit https://github.com/vim/vim/commit/3cba73423e5304ef7ccdb2280d65562d2f06f483 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Apr 15 13:12:46 2018 +0200 patch 8.0.1717: C89 check causes too much trouble Problem: C89 check causes too much trouble. Solution: Remove enforcing C89 for now.

" Settings for test script execution
" Always use "COMMAND.COM", don't use the value of "$SHELL".
set shell=c:\COMMAND.COM shellquote= shellxquote= shellcmdflag=/c shellredir=>
" This is used only when the +eval feature is available.
if executable("cmd.exe")
   set shell=cmd.exe
endif

source setup.vim