Can't speak for way in the past, but as a user for the past 4 odd years I
never had access to the C source files in the docs.

On Mon, Feb 27, 2023, 7:59 AM Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> Did I dream it?
>
> I was convinced we had installed a change a couple years ago which makes
> `make install` include a (compressed) copy of our C source files so that
> `C-h f` can jump to them even for those users who don't build
> Emacs themselves.
>
> But I can't find any trace of that anywhere.
>
>
>         Stefan
>
>
>