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Re: systemd units are not installed in 4.19.0-rc2 anymore
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 15 Jul 2024 11:07:42 +0100
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- Cc: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- Delivery-date: Mon, 15 Jul 2024 10:07:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15/07/2024 9:11 am, Jan Beulich wrote:
> On 13.07.2024 15:02, Andrew Cooper wrote:
>> On 13/07/2024 3:45 am, Marek Marczykowski-Górecki wrote:
>>> Hi,
>>>
>>> Something has changed between -rc1 and -rc2 that systemd units are not
>>> installed anymore by default.
>>>
>>> Reproducer:
>>>
>>> ./configure --prefix=/usr
>>> make dist-tools
>>> ls dist/install/usr/lib/systemd/system
>>>
>>> It does work, if I pass --enable-systemd to ./configure.
>>>
>>> My guess is the actual change is earlier, specifically 6ef4fa1e7fe7
>>> "tools: (Actually) drop libsystemd as a dependency", but configure was
>>> regenerated only later. But TBH, I don't fully understand interaction
>>> between those m4 macros...
>> Between -rc1 and -rc2 was 7cc95f41669d
>>
>> That regenerated the existing configure scripts with Autoconf 2.71, vs
>> 2.69 previously.
>>
>> Glancing through again, I can't spot anything that looks relevant.
>>
>>
>> 6ef4fa1e7fe7 for systemd itself was regenerated, and I had to go out of
>> my way to get autoconf 2.69 to do it.
> Yet was it correct for that commit to wholesale drop
> AX_CHECK_SYSTEMD_ENABLE_AVAILABLE? That's, afaics, the only place where
> $systemd would have been set to y in the absence of --enable-systemd.
Hmm.
Yes it was right to drop that, because the whole purpose of the change
was to break the dependency with systemd.
Thereafter, looking for systemd in the build environment is a bogus
heuristic, and certainly one which would go wrong in XenServer's build
system where the Mock chroot strictly has only the declared dependencies.
I see two options.
1) Activate Systemd by default on Linux now (as it's basically free), or
2) Update CHANGELOG to note this behaviour
Personally I think 2 is the better option, because we don't special case
the other init systems.
~Andrew
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