xft use --with-cairo

xft use --with-cairo

[Stefan Monnier]

I just noticed a funny detail of the `configure` step when
using --with-cairo:

    [...]
    Does Emacs use -lotf?                                   yes
    Does Emacs use -lxft?                                   
    Does Emacs use -lsystemd?                               no
    [...]

Notice how it stays silent about xft.
The build goes through just fine, so I'm not sure what this means.
Should it say yes/no, or is xft indispensable for Cairo, in which case
the whole line should maybe be removed?


        Stefan

Re: xft use --with-cairo

[YAMAMOTO Mitsuharu]

On Tue, 25 Jun 2019 04:36:21 +0900,
Stefan Monnier wrote:
> 
> I just noticed a funny detail of the `configure` step when
> using --with-cairo:
> 
>     [...]
>     Does Emacs use -lotf?                                   yes
>     Does Emacs use -lxft?                                   
>     Does Emacs use -lsystemd?                               no
>     [...]
> 
> Notice how it stays silent about xft.
> The build goes through just fine, so I'm not sure what this means.
> Should it say yes/no, or is xft indispensable for Cairo, in which case
> the whole line should maybe be removed?

The cairo build used to depend on Xft, but that is no longer the case
(even with lwlib-Xaw).  I overlooked this one when I made such
changes.  I've pushed a fix to display "no" for this case.

				     YAMAMOTO Mitsuharu
				mituharu@math.s.chiba-u.ac.jp

Re: xft use --with-cairo

[Stefan Monnier]

> The cairo build used to depend on Xft, but that is no longer the case
> (even with lwlib-Xaw).  I overlooked this one when I made such
> changes.  I've pushed a fix to display "no" for this case.

Thanks.  I wonder, tho: the user might be tempted to conclude that the
xft headers were not found or something like this, so maybe it's better
to remove the line altogether (or put something like "N/A").


        Stefan

Re: xft use --with-cairo

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Mon, 24 Jun 2019 19:27:46 -0400
> Cc: emacs-devel@gnu.org
> 
> > The cairo build used to depend on Xft, but that is no longer the case
> > (even with lwlib-Xaw).  I overlooked this one when I made such
> > changes.  I've pushed a fix to display "no" for this case.
> 
> Thanks.  I wonder, tho: the user might be tempted to conclude that the
> xft headers were not found or something like this, so maybe it's better
> to remove the line altogether (or put something like "N/A").

The xft non-use in this case is similar to half a dozen other lines in
the same list, so if we are going to display something other than just
YES or NO, we should do that in all such lines.