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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [platform-testers] Emacs 26.2 RC1 is out!
Date: Fri, 22 Mar 2019 15:19:56 +0200
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: emacs-devel@gnu.org
> Date: Fri, 22 Mar 2019 08:20:14 -0400
> 
> >> Hmm... would there be a way to make it so configure accepts options like
> >> 
> >>     ./configure ... --with-xpm=ifavailable  --with-jpeg=ifavailable ...
> >> 
> >> so you can use a single script on all systems and it will use xpm
> >> where available?
> >
> > AFAIR, that is how this worked before, and we changed that because it
> > would cause builds without image libraries without noticing.
> 
> I know but what I'm proposing is to make it possible for the user to
> explicitly say "yes, please do just that, even though it has proved
> undesirable as a default behavior".

I understood that, but AFAIK there's no other project which supports
that.