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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 10:37:10 +0300
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Cc: emacs-devel@gnu.org
To: Stefan Monnier <monnier@iro.umontreal.ca>
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In-reply-to: <jwvpnqjk98t.fsf-monnier+emacs@gnu.org> (message from Stefan
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Thu, 21 Mar 2019 21:08:55 -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.  The
configure messages about lack of the packages are not easy to spot,
among all the other "Checking for ... no" messages.