Question about non-xfce dependencies for 4.20

[Ken Moffat]

Hi,

I'm trying to build 4.20-rc1 packages, in the hope I can eventually
run startxfce4-wayland and begin to work out how to setup my own
(idiosyncratic) keyboard mapping. But I'm having difficulty
identifying the non-xfce dependencies.

This is on a completed (BLFS-12.2) system using startxfce4 which has
Wayland protocols etc, but I'm having a bit of difficulty
identifying exactly which non-xfce packages are needed.

I eventually got libxfce4windowing built with gtk-layer-shell (deps
of libdisplay-info, then gtk-layer-shell - those deps seemed hard to
discover) but it appears that I _need_ D-Bus menu support: I see
Arch use a git version, and ubuntu have a (newer) version pulled
from bzr, but that apparently needs some gnome package(s) to run
./autogen.sh.

First question: Is there a canonical libdbusmenu version to download
the source, and what dependencies does it require ?

Second question: It seems I have a choice of compositors -

One of the links at xfce mentioned Weston, but other links mentioned
Wayfire or Labwc. Has here been any movement towards preferring a
specific compositor ? (some of the notes might be out of date, I can
see that developers are concnetrating on getting things working).

TIA

ĸen
-- 
    When you come to a fork in the road, take it.  -- Togi Berra