bug#54633: [PATCH] * configure.ac: Fix --without-gif for W32, NS, Haiku, and PGTK.

[Eli Zaretskii]

> Date: Wed, 30 Mar 2022 12:42:54 +0000
> From: Randy Taylor <dev@rjt.dev>
> Cc: 54633@debbugs.gnu.org
> 
> When I build Emacs I specify "--without-gif".
> 
> When using PGTK:
>   - With the original code and specifying "--without-gif", here is what 
> configure gives me: Does Emacs use a gif library?                           
> yes -lgif
>   - With the patch and specifying "--without-gif", I get this (as expected): 
> Does Emacs use a gif library?                           no
>   - With the patch, if I remove "--without-gif" or specify "--with-gif=yes", 
> I get this (as expected): Does Emacs use a gif library?                       
>     yes -lgif
> 
> When using X11:
>   - With the original code and specifying "--without-gif", here is what 
> configure gives me (as expected): Does Emacs use a gif library?               
>             no
>   - With the original code and removing "--without-gif" or specifying 
> "--with-gif="yes", here is what configure gives me (as expected): Does Emacs 
> use a gif library?                           yes -lgif
> 
> The check in the code for "--without-gif" only applies to X11, but not the 
> other systems.
> This patch fixes it to apply for all the systems in that check, in the same 
> fashion as the SVG check (see line 2660 in configure.ac).

Thanks.  But your patch touched more than just the PGTK build.  For
w32, for example, I see no reason to make any changes; do you?
Likewise for NS.

Po Lu, do you agree that only PGTK needs a fix?  If co, can you
suggest a fix for PGTK only?