[systemd-devel] [PATCH] Makefile.am: reduce linked libraries

[Kay Sievers]

On Wed, Apr 4, 2012 at 18:53, Daniel Drake <dsd at laptop.org> wrote:
> On Wed, Apr 4, 2012 at 10:36 AM, Daniel Drake <dsd at laptop.org> wrote:
>> But with selinux included, the task is more complicated. For example,
>> label.c (part of libsystemd-basic) also uses libselinux, so we need to
>> move it out somewhere else (lets say we put it in a new library:
>> libsystemd-extra). But the label_ functions are used several places
>> inside util.c itself. Things are tangled. If I were to go down this
>> path further I think we'd end up moving a huge amount of stuff to
>> libsystemd-extra.
>
> I just realised that udevd links against libselinux, so even if we fix
> selinux-timestamp I still won't be winning on that front - and I don't
> see an easy way to keep udevd out of a dracut initramfs.
>
> However, dropping the link against libcap (which also includes
> libattr) would be nice. Here is a patch to do that.
>
>
> Now that udev is included in systemd I will use this opportunity to
> moan a little about the next dependency lover that gets included in
> the initramfs: udevadm.
>
> /usr/bin/udevadm
>        linux-gate.so.1 =>  (0xb771f000)
>        libselinux.so.1 => /lib/libselinux.so.1 (0xb76b9000)
>        libblkid.so.1 => /lib/libblkid.so.1 (0xb768f000)
>        libkmod.so.2 => /lib/libkmod.so.2 (0xb7677000)
>        librt.so.1 => /lib/librt.so.1 (0xb766e000)
>        libc.so.6 => /lib/libc.so.6 (0xb74be000)
>        libdl.so.2 => /lib/libdl.so.2 (0xb74b9000)
>        /lib/ld-linux.so.2 (0x4610a000)
>        libuuid.so.1 => /lib/libuuid.so.1 (0xb74b3000)
>        liblzma.so.5 => /lib/liblzma.so.5 (0xb748a000)
>        libz.so.1 => /lib/libz.so.1 (0xb7474000)
>        libpthread.so.0 => /lib/libpthread.so.0 (0xb7459000)
>
> Don't suppose there is any obvious reduction possible here?

It should be possible: selinux, lzma, z should not be needed. I think
they just appeared in the systemd tree, and did not in the udev tree.
There will be a lot of turnaround in the systemd tree then next weeks
and udev will see some changes, so the current state just reflects a:
"it builds after the merge" nothing else really.

Blkid, uuid, kmod are linked because of the udevadm test-builtin
command. We could change that one way or the other if it really solves
a problem, which it might not.

Kay