Fix GDM 45 on SysV systems

[Douglas R. Reno]

Copied from blfs-dev (Joe Locash sent it in yesterday):

The build of gdm fails with:
  ../data/meson.build:169:21: ERROR: Unknown variable "systemd_dep".

The sed in the book doesn't take care of all references to systemd_dep but
with gdm-45 they've added support for elogind so the sed is unnecessary .

For elogind use -Dlogind-provider=elogind and -Dsystemdsystemunitdir=no 
-Dsystemduserunitdir=no

rm -rv /tmp/*.{service,target.d} can also be removed.

I'll try to get to this today or tomorrow. Still not sure what I've got going on today

[pierre]

I can confirm that gdm can be built with:

-Dlogind-provider=elogind
-Dsystemdsystemunitdir=no 
-Dsystemduserunitdir=no

and that nothing is installed in /usr/lib/systemd. But...

gdm does not start, there is a permission problem. Trying to diagnose.

[Xi Ruoyao]

So it's not only a build issue.

[pierre]

Replying to Xi Ruoyao:

So it's not only a build issue.

Err, yes it is. I had stupidly removed all the sed's. Obviously, the one for gdm-launch-environment is needed! Reinstated it, and now gdm starts, and launches gnome (not tried all the DE's)

[pierre]

So, Joe's fixes seem to be ok for sysv.

[Douglas R. Reno]

Fixed at c266b641dbac8354bfeba21780db2292d38bef3a