Several submodules of midas have been re-organized, so if you want to pull the
newest version, you need a
git pull --recurse-submodules
git submodule update --init --recursive
before you can build again. To do this automatically the next time, you can do
git config submodule.recurse true
which needs git 2.14 or later. I hope this works for everybody. If there is a
better way to do that (I'm not a big expert on git) please reply here.