Linus Torvalds supposedly uses a version of mg (formerly Micro GNU Emacs)
that is maintained along with the Linux kernel:

  https://git.kernel.org/pub/scm/editors/uemacs/uemacs.git

Hope that helps,
~Chad

On Sat, Aug 17, 2019 at 6:27 PM Jeffrey Walton <noloader@gmail.com> wrote:

> Hi Everyone,
>
> I'm trying to find a lightweight C-only implementation of Emacs for
> Linux. I need it for situations like this:
> https://redmine.pfsense.org/issues/9682 .
>
> Searching is pretty much useless due to irrelevant results. I found
> Zile at https://www.gnu.org/software/software.html#allgnupkgs , but it
> fails to build (it configures OK).
>
> I understand I will probably loose some functionality due to decoupling
> Lisp.
>
> Does anyone have a list of Emacs replacements?
>
> Thanks in advance.
>
> Jeff
>
>