Seems to be asking you to update the location of the config file:

Old:
~/.fonts.conf

New:
/home/joe/.config/fontconfig/fonts.conf

mv ~/.fonts.conf ~/fonts.conf
mkdir -p /home/joe/.config/fontconfig/
mv ~/fonts.conf /home/joe/.config/fontconfig/


Restart Libreoffice.

Thanks,
Alexander.

Sent from my Samsung Galaxy S8+

On Wed, Aug 22, 2018, 20:01 Joe Lowder <joe@actionline.com> wrote:

> Can someone please explain to me why I am seeing the
> fontconfig warning quoted below every time I run this:
>
> /usr/lib/libreoffice/program/swriter
>
> (And what change do I need to make
> to stop this from appearing?)
>
> Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 14: reading
> configurations from ~/.fonts.conf is deprecated. please move it to
> /home/joe/.config/fontconfig/fonts.conf manually
>
> Here is the content of 50-user.conf:
> lrwxrwxrwx 1 26 Aug 16  2016 50-user.conf -> ../conf.avail/50-user.conf
> t420: cat 50-user.conf
> <?xml version="1.0"?>
> <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
> <fontconfig>
>         <!--
>             Load per-user customization files where stored on XDG Base
> Directory
>             specification compliant places. it should be usually:
>               $HOME/.config/fontconfig/conf.d
>               $HOME/.config/fontconfig/fonts.conf
>         -->
>         <include ignore_missing="yes"
> prefix="xdg">fontconfig/conf.d</include>
>         <include ignore_missing="yes"
> prefix="xdg">fontconfig/fonts.conf</include>
>         <!-- the following elements will be removed in the future -->
>         <include ignore_missing="yes"
> deprecated="yes">~/.fonts.conf.d</include>
>         <include ignore_missing="yes"
> deprecated="yes">~/.fonts.conf</include>
> </fontconfig>
>
> Here are the entries at the two referenced locations:
> (1) /home/joe
> -rw-r--r-- 1  761 Dec 30  2016 .fonts.conf
>
> (2) /home/joe/.config/fontconfig
> -rw-r--r-- 1 509 Oct 17  2015 fonts.conf.old
> -rw-r--r-- 1 761 Dec 30  2016 fonts.conf
>
>
>
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