bug#49789: 28.0.50; svg file is not displayed when opening (--with-x-toolkit=athena)

[Eli Zaretskii <eliz@gnu.org>]

> From: Uwe Brauer <oub@mat.ucm.es>
> Cc: Uwe Brauer <oub@mat.ucm.es>, 49789@debbugs.gnu.org
> Date: Sat, 31 Jul 2021 14:04:03 +0200
> 
> > your build was not linked against the librsvg library (the RSVG
> > feature is not in the list), so it simply doesn't support display of
> > SVG images.
> 
> Hm, the INSTALL file states:
> 
> 
> To disable individual types of image support in Emacs for some reason,
> even though configure finds the libraries, you can configure with one
> or more of these options:
> 
>   --without-xpm          for XPM image support
>   --without-jpeg         for JPEG image support
>   --without-tiff         for TIFF image support
>   --without-gif          for GIF image support
>   --without-png          for PNG image support
>   --without-rsvg         for SVG image support
> 
> Since I did not use --without-rsvg, I interpret this instruction that
> svg *is* supported. So 
> 
>     1. Either the documentation should be changed or
> 
>     2. There is a bug somewhere

Note the "even though configure finds the libraries" part in the
INSTALL text.  In your case, the configure script didn't find librsvg,
I guess, so the --without-NNN is not needed to build Emacs without SVG
support.