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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: GDI+ take 3
Date: Wed, 15 Apr 2020 17:15:27 +0300
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To: Angelo Graziosi <angelo.g0@libero.it>
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 Angelo Graziosi on Wed, 15 Apr 2020 16:07:46 +0200 (CEST))
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> Date: Wed, 15 Apr 2020 16:07:46 +0200 (CEST)
> From: Angelo Graziosi <angelo.g0@libero.it>
> 
>   Does Emacs use -ljpeg?                                  yes
>   Does Emacs use -ltiff?                                  yes
>   Does Emacs use a gif library?                           yes
>   Does Emacs use a png library?                           yes
> [...]
>   Does Emacs use native APIs for images?                  yes (w32)
> [...]
> 
> Maybe I am wrong, but the discussion started with the goal to make the Windows build self-contained without PNG, JPEG etc.. Or Not?

You could try building --without-jpeg etc., if you want.  It's
supposed to work (except that w32-use-native-image-API still has to be
set to a non-nil value for it to actually do it).  I didn't yet try
such a build myself, so if there are problems, please be sure to
report them.