Re: [PATCH PING] Honor 'SOURCE_DATE_EPOCH' when generating autoloads.

[Paul Eggert]

Eli Zaretskii wrote:
> Some code out there that expects the value to be a string might become
> broken by such a change, I think.

I doubt whether there is any such code that will break. No code uses the 
variable within Emacs itself; I just checked. And the variable is not documented 
to contain only a string, so strictly speaking the implementation can make the 
variable nil if wants to.

We should also obsolete the variable, while we're at it. There's a comment to 
that effect before the variable. Really, code should not be using 
emacs-build-system.