bug#42844: 27.1; Emacs 27.1: SVG file not rendered as image

[phillip . lord]

On 2020-08-15 18:44, Eli Zaretskii wrote:
> > Cc: 42844@debbugs.gnu.org
> > From: "gbiotti@gmail.com" <gbiotti@gmail.com>
> > Date: Sat, 15 Aug 2020 19:29:30 +0200
> >
> > > Phillip, could you please look into this?  The missing DLLs should be
> > > added to the bundle.
> >
> > It turns out that this is not enough.
> > I copied the three dll from the 26.3 bundle and run the test again:
> >
> > (image-type-available-p 'svg) => nil
> >
> > And obviously the svg file is shown as text.
>
> Then using the same dependency tool, please look for more missing
> DLLs.  There must be others.
>
> > I can make it work only by operating a Frankestein mix between old 
> > 26.3
> > bundle (with deps) and 27.1 bundle (with deps).
>
> I don't understand what that means, sorry.

It probably means unpacking the 26.3 deps bundle over Emacs 27.1, or 
some mixture of the two. As the 26.3 bundle had a lot more dependencies 
that's not a surprise. Specifically, the problem is probably the logic 
in Emacs-27.1 that skips glib2 as a dependency. IIRC, that brings in 
python and many other of the packages from msys2 which made Emacs-26.3 
so huge.

The librsvg dependency itself is correctly given when I build the zips 
package.

Phil