/usr/share/vim/vim74/compiler/xbuild.vim is in vim-runtime 2:7.4.052-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | " Vim compiler file
" Compiler: Mono C#
" Maintainer: Chiel ten Brinke (ctje92@gmail.com)
" Last Change: 2013 May 13
if exists("current_compiler")
finish
endif
let current_compiler = "xbuild"
let s:keepcpo= &cpo
set cpo&vim
if exists(":CompilerSet") != 2 " older Vim always used :setlocal
command -nargs=* CompilerSet setlocal <args>
endif
CompilerSet errorformat=\ %#%f(%l\\\,%c):\ %m
CompilerSet makeprg=xbuild\ /nologo\ /v:q\ /property:GenerateFullPaths=true
let &cpo = s:keepcpo
unlet s:keepcpo
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