Lars Ingebrigtsen <larsi@gnus.org> writes:

> 2) If the function was defined in a .el file (as this bug report
> describes), then Emacs knows the name of the library.  But it doesn't
> then use `find-library-name' to locate the library, but just uses
> load-history.  Fixing this is pretty easy -- just use
> `find-library-name' and use that instead of the value from
> `load-history'.

Yes, this is working fine, it is what I am using actually.
https://github.com/emacs-helm/helm/blob/master/helm-lib.el#L1230


-- 
Thierry