bug#41890: bug#42210: bug#41890: 28.0.50; [PATCH]: Add bindings for project.el

[Dmitry Gutov]

On 20.07.2020 23:47, Juri Linkov wrote:
> I don't know why the user might want to find files or search in such
> non-project directories as/usr/share/emacs/site-lisp/gtk-doc-tools/

Apparently these directories are in your load-path.

I think it makes sense to search for files across your load path sometimes.

Or if you have multiple tag files loaded, it would search across 
directories containing those files.

And that's just with the built-in backend. Other projects can have other 
examples of what constitutes external roots.