Re: How does one find out what file a library has been loaded from?

[Eli Zaretskii]

> Date: Tue, 19 Jul 2022 10:52:08 +0000
> From: Alan Mackenzie <acm@muc.de>
> 
> Hello, Emacs.
> 
> Forgive me if I've asked this before, but how does one determine what
> file a library has been loaded from?  In particular, whether that file
> is a source file, a byte compiled file or a native compiled file.
> 
> I've tried looking at load-history, and it tells me cc-engine was loaded
> from 
> 
>   "/home/acm/emacs/emacs.git/sub-master-5/lisp/progmodes/cc-engine.elc"
> 
> ..  I think that's a lie.  I suspect I'm dealing with a native compiled
> cc-engine, here.  In fact, the string ".eln" doesn't occur anywhere in
> load-history, and I _know_ some of the files are native compiled - my
> build was configured with-native-compilation.
> 
> So, how do I find this out?

What do you like to find? whether it was loaded from cc-engine.elc or
cc-engine-XXXXXX.eln?  If so, why does it matter?