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Bug#1023779: linux: deleting the kernel image package leaves back /lib/modules/<version> when a kernel package was built

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On donderdag 10 november 2022 03:42:36 CET Christoph Anton Mitterer wrote:
> On Thu, 2022-11-10 at 03:37 +0100, Christoph Anton Mitterer wrote:
> > $ ls -al 6.0.0-3-amd64/build 6.0.0-3-amd64/source
> > lrwxrwxrwx 1 calestyo calestyo 36 Nov  5 14:41 6.0.0-3-amd64/build ->
> > /usr/src/linux-headers-6.0.0-3-amd64 lrwxrwxrwx 1 calestyo calestyo 37
> > Nov  5 14:41 6.0.0-3-amd64/source ->
> > /usr/src/linux-headers-6.0.0-3-common
> The date of the symlinks is November the 5th, however I built the
> custom kernel this night.

https://tracker.debian.org/news/1381949/accepted-linux-607-1-source-into-unstable/
Shows that 6.0.0-3 was accepted into Unstable on Nov 5 ...

> So there must have been something else that created them (dkms? - at
> least not me personally)... or is there some date mangling somewhere
> for making reproducible builds?

https://tracker.debian.org/pkg/linux does say "Does not build reproducibly" 
But in the aforemention link you can also see this line:
"Date: Sat, 05 Nov 2022 14:41:22 +0100"
It _could_ be a coincidence, but I doubt it. So it looks like it's not fully
reproducible (yet), but using that date is a step towards it.

Getting (back) to the actual subject of the bug report, it seems quite likely
that you also have linux-headers-X.Y.Z installed.
And IIRC, it needs/creates those 'source' and 'build' dirs/links.

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Bug#1023779: linux: deleting the kernel image package leaves back /lib/modules/<version> when a kernel package was built Christoph Anton Mitterer <calestyo@scientia.org> - 2022-11-10 03:40 +0100
  Bug#1023779: linux: deleting the kernel image package leaves back /lib/modules/<version> when a kernel package was built Christoph Anton Mitterer <calestyo@scientia.org> - 2022-11-10 03:50 +0100
    Bug#1023779: linux: deleting the kernel image package leaves back /lib/modules/<version> when a kernel package was built Diederik de Haas <didi.debian@cknow.org> - 2022-11-10 11:10 +0100
  Bug#1023779: linux: deleting the kernel image package leaves back /lib/modules/<version> when a kernel package was built Bastian Blank <waldi@debian.org> - 2022-11-10 13:10 +0100
    Bug#1023779: linux: deleting the kernel image package leaves back /lib/modules/<version> when a kernel package was built Christoph Anton Mitterer <calestyo@scientia.org> - 2022-11-10 14:20 +0100

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