[OE-core] RFE: make the init manager an image feature (again)

[Enrico Scholz]

Ross Burton <ross.burton-ral2JQCrhuEAvxtiuMwx3w at public.gmane.org>
writes:

> the source, so enabling systemd may well lead to libsystemd-* libraries
> sneaking into your rescue image.

for socket activation and sd_notify(), only libsystemd-daemon is required
which is

-rwxr-xr-x    1 root     root         11644 Feb 25 09:27 /lib/libsystemd-daemon.so.0.0.7

~ # ldd /lib/libsystemd-daemon.so.0.*
        libdl.so.2 => /lib/libdl.so.2 (0x441e0000)
        librt.so.1 => /lib/librt.so.1 (0x441c8000)
        libc.so.6 => /lib/libc.so.6 (0x44040000)
        /lib/ld-linux.so.3 (0x44010000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x441a0000)

~ # ldd -u -r /lib/libsystemd-daemon.so.0.*
Unused direct dependencies:
        /lib/libdl.so.2


Ok, it needs more space than nothing and small things like this can sum
up easily.  But it is still a significant difference between having
libsystemd-daemon in the image or the whole systemd.


> The systemd libraries will have to be reviewed to verify that installing
> one of them doesn't pull in systemd itself.

afair, libsystemd-daemon was designed to be as light weighted as possible
and will never depend on the rest of systemd.



Enrico