gtk4 complains on lack of some not-critical shared libs

[yvs]

Hi everyone,

running gtk4 extension app I got next not-critical gtk warnings:

(pingpath:4420): Gtk-WARNING **: 19:19:08.973: Locale not supported by C librar.
        Using the fallback 'C' locale.
libcups.so.2: cannot open shared object file: No such file or directory
Failed to load module: /usr/local/lib/gtk-4.0/4.0.0/printbackends/libprintbacked-cups.so
libgstplayer-1.0.so.0: cannot open shared object file: No such file or director
Failed to load module: /usr/local/lib/gtk-4.0/4.0.0/media/libmedia-gstreamer.so
...

After looking at

% ldd /tmp/tcloop/gtk4/usr/local/lib/gtk-4.0/4.0.0/**/*.so | grep 'ot found'
        libgstplayer-1.0.so.0 => not found
        libgstvideo-1.0.so.0 => not found
        libgstreamer-1.0.so.0 => not found
        libgstgl-1.0.so.0 => not found
        libcups.so.2 => not found
        libcolord.so.2 => not found

and added 'gstreamer gst-plugins-bad colord libcups' extensions
those gtk complains are gone.

Not sure if they need to be added in gtk4 deps.

p.s. arch x86_64