> check-if-root: > @if test `id -u` = 0 && ! grep -q 'lxc\|docker' /proc/self/cgroup; then > \ > echo; \ > echo 'No. You make ME a sandwich.'; \ > echo; \ > exit 1; \ > fi
That code means "if current user is root and it is not a docker/lxc container then fail". Libreoffice maintainers just warns you that you shouldn't run build process under root (so, add "userpriv sandbox usersandbox" and so on to the FEATURES). and the sandwitch is just reference to the https://www.xkcd.com/149/
