bug#67810: 29.1; fonts use synthetic bold on Linux / pgtk

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: crypto@timruffing.de,  stefankangas@gmail.com,  67810@debbugs.gnu.org
> Date: Sun, 14 Jan 2024 16:09:10 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > OK, so what is the problem with allowing those users to have the
> > variable I proposed, for use with such fonts?
> 
> Because packages using such fonts should display these icons with a face
> that isn't bold?

There are faces that Emacs imposes that are not controlled by
packages.  For example, the buffer name on the mode line is displayed
in bold, and changing that is not easy.  Why cannot we allow users to
tweak this issue by providing a simple variable?  What are the
downsides?