Looks like the docker images to build uses an older version, will update it tomorrow.

@zoq Sounds good.

Thanks for all the ifdef cleanups---I didn't realize there was so much of that going on in ensmallen. I'll approve too once we get CI passing and then we can get this merged and a new release out. 👍

@shrit @rcurtin @zoq I've updated the CI config via commits 32015ae and 51c9506
Let me know if this isn't the right way or something else needs to be done

Perfect, I just need to rebuild the docker image that we use on the jenkins server, and that should fix the ensmallen sanity checks job as well.

@zoq Do you mean updating the Ubuntu image? I think the current image uses the old Ubuntu 20.04 release which only has armadillo 9.800.4

@zoq Do you mean updating the Ubuntu image? I think the current image uses the old Ubuntu 20.04 release which only has armadillo 9.800.4

Right, updated the image.

@mlpack-jenkins test this please

@rcurtin @shrit Could you provide the second approval to facilitate merging? The mlpack bot (that automatically provides the second approval after 24 hours) seems to have gone missing in action.

@conradsnicta oh, you're right, I need to add the Github actions script to this repo too. (Basically I went to update mlpack-bot because it stopped working, then it turned out everything it was built on was deprecated, and so in the end I rewrote its functionality as a Github action.)